| 40AK | Sterling Air Park Airport | Sterling AK |
| 40AR | Lost Bridge Village Airport | Garfield AR |
| 40AZ | Boulais Ranch Airport | Maricopa AZ |
| 40C | Watervliet Muni Airport | Watervliet MI |
| 40CA | City Of Industry Civic Financial Center Heliport | City Of Industry CA |
| 40CN | Physicians Hospital Heliport | Murrieta CA |
| 40D | Three Lakes Muni Airport | Three Lakes WI |
| 40FD | Little's Heliport | Lakeland FL |
| 40FL | Adana Airfield Airport | Punta Gorda FL |
| 40G | Valle Airport | Grand Canyon AZ |
| 40GA | Smyrna Hospital Heliport | Smyrna GA |
| 40I | Red Stewart Airfield Airport | Waynesville OH |
| 40IL | Antique Aerodrome Airport | Cornell IL |
| 40IN | Cherry Hill Airport | Freetown IN |
| 40J | Perry-foley Airport | Perry FL |
| 40KS | Chanay Airport | Williamsburg KS |
| 40KY | Rooster Field Airport | Shelbyville KY |
| 40LA | Woodsland Plantation Airport | Monroe LA |
| 40LL | Kirby Medical Center Heliport | Monticello IL |
| 40ME | Tib Field Airport | Fryeburg ME |
| 40MN | Turner Field Airport | Bingham Lake MN |
| 40MO | Louise's Strip Airport | Weston MO |
| 40MT | Silver Creek Airport | Helena MT |
| 40ND | Gorder Farm Heliport | Galchutt ND |
| 40NE | Landgren Ranch Airport | Bartlett NE |
| 40NJ | Osterman Heliport | Neshanic NJ |
| 40NR | Steele Creek Heliport | Charlotte NC |
| 40NY | Entenmann's Heliport | Bay Shore NY |
| 40OH | Bucks Airport | Newbury OH |
| 40OI | M.c.r. Airport | Lodi OH |
| 40OK | Hilltop Airport | Oilton OK |
| 40OR | St Anthony's Hospital Heliport | Pendleton OR |
| 40PA | Cinram Group Inc Heliport | Olyphant PA |
| 40PN | Eagles Mere Field Airport | Eagles Mere PA |
| 40TA | Miles Field Airport | Jewett TX |
| 40TE | Sybert Farm Airport | Jarrell TX |
| 40TS | Square K Airport | West TX |
| 40U | Manila Airport | Manila UT |
| 40VA | Martinsville/henry County Memorial Hosp. Heliport | Martinsville VA |
| 40WA | Signal Peak Lookout Heliport | White Swan WA |
| 40WI | Schubert Airstrip Airport | Centerville WI |
| 40XA | Lone Star Heliport | Houston TX |
| 40XS | Breakaway Park Airport | Cedar Park TX |
| 41A | Reeves Airport | Tallassee AL |
| 41AK | Settlers Bay Airstrip Airport | Wasilla AK |
| 41AR | Ashworth Airport | Arkadelphia AR |
| 41AZ | Ak Chin Community Airfield Airport | Maricopa AZ |
| 41C | Calkins Field Airport | Wayland MI |
| 41CA | Silver Creek Ranch Airport | Forest Glen CA |
| 41CO | Flying Dog Ranch Airstrip Airport | Meeker CO |
| 41F | Floydada Muni Airport | Floydada TX |
| 41FD | Rotunda Heliport | Placida FL |
| 41FL | Southern Machine & Steel Yard Heliport | Fort Myers FL |
| 41G | University Airpark Airport | Bath MI |
| 41GA | Clayton Heliport | Jonesboro GA |
| 41ID | Black's Airfield Airport | Kuna ID |
| 41IG | Parker Field Airport | Crawfordsville IN |
| 41IN | Professional Arts Building Heliport | New Albany IN |
| 41KS | Flying Z Ranch Airport | Spring Hill KS |
| 41KY | Jewish Hospital Heliport | Louisville KY |
| 41LA | Metro Aviation Heliport | Shreveport LA |
| 41MA | Haney Heliport | Mashpee MA |
| 41MO | Textor Airport | Willard MO |
| 41MT | R & R Field Airport | Heron MT |
| 41N | Braceville Airport | Newton Falls OH |
| 41NC | Sloop Airport | Kannapolis NC |
| 41NJ | Meadowlands Hospital Medical Center Heliport | Secaucus NJ |
| 41NK | Winchell Mountain Airport | North East NY |
| 41NY | Bonebender Airport | Essex NY |
| 41OH | Sleepy Hollow Airport | New Franklin OH |
| 41OI | Mansfield General Hospital Heliport | Mansfield OH |
| 41OK | 5 Alive Heliport | Oklahoma City OK |
| 41OR | Mckenzie-willamette Medical Center Heliport | Springfield OR |
| 41PA | Deitch Airport | New Kingstown PA |
| 41PN | Decarbo Ambulance Service Heliport | New Castle PA |
| 41TA | Circle P Ranch Airport | Glen Rose TX |
| 41TE | Vamc Heliport | Kerrville TX |
| 41TN | Stonewall Airpark Airport | Milton TN |
| 41TS | Flying T Ranch Airport | Westminster TX |
| 41TX | Henington Airport | Wolfe City TX |
| 41U | Manti-ephraim Airport | Manti UT |
| 41VA | Stafford Hospital Center Heliport | Stafford VA |
| 41WA | Central Washington Hospital Heliport | Wenatchee WA |
| 41WI | Paddock Field Airport | Elkhorn WI |
| 41XA | Saber Heliport | Spring Branch TX |
| 41XS | Macho Grande Airport | Taylor TX |
| 42A | Melbourne Muni - John E Miller Field Airport | Melbourne AR |
| 42AK | Wicker Airport | Wasilla AK |
| 42AR | Baxter County Sheriffs Heliport | Mountain Home AR |
| 42B | Goodspeed Airport | East Haddam CT |
| 42C | White Cloud Airport | White Cloud MI |
| 42CA | John F Kennedy Memorial Hospital Heliport | Indio CA |
| 42CL | Costa Mesa Police Department Heliport | Costa Mesa CA |
| 42CN | Peg Field Airport | Reedley CA |
| 42CO | St Anthony's Hospital Heliport | Lakewood CO |
| 42FD | Palm Beach State College Heliport | Lake Worth FL |
| 42FL | Plantation Key Seaplane Base | Marathon FL |
| 42GA | Matthews Heliport | Marietta GA |
| 42I | Parr Airport | Zanesville OH |
| 42IA | Lakeport Farms Airport | Salix IA |
| 42II | Norm's Airpark Airport | La Porte IN |
| 42IL | Lynn Heliport | Union IL |
| 42IN | Mikelsons Heliport | Indianapolis IN |
| 42J | Keystone Airpark Airport | Keystone Heights FL |
| 42KY | Pirates Cove Airport | Benton KY |
| 42L | Naa Long Beach Port Helistop Heliport | Long Beach CA |
| 42LA | Lakewood Hospital Heliport | Morgan City LA |
| 42M | Thayer Memorial Airport | Thayer MO |
| 42MA | Worcester Medical Center Heliport | Worcester MA |
| 42MD | Herrington Field Airport | Oakland MD |
| 42MN | Kral's Personal Use Landing Field Airport | Corcoran MN |
| 42MO | Aire Parque Airport | Festus MO |
| 42MS | Och Rgnl Medical Center Heliport | Starkville MS |
| 42NC | Spring Paths Airport | Spring Hope NC |
| 42NH | Androscoggin Valley Hospital Airport | Berlin NH |
| 42NJ | Elmer Community Hospital Heliport | Elmer NJ |
| 42NY | Walter's Field Airport | East Homer NY |
| 42OH | Dunn Field Airport | Newton Falls OH |
| 42OK | Kwtv Heliport | Oklahoma City OK |
| 42OR | Shotgun Ranch Airstrip Airport | Post OR |
| 42PA | Ransome Heliport | Exton PA |
| 42PN | Allegheny General Hospital Emergency Heliport | Pittsburgh PA |
| 42SC | Chicken Coop Airport | Florence SC |
| 42TA | Rental Tools Heliport | La Porte TX |
| 42TE | Ball Airport | Victoria TX |
| 42TN | Oliver Landing Airport | Paris TN |
| 42TS | Papa Heliport | Houston TX |
| 42TX | Magee Airport | Wolfe City TX |
| 42U | Morgan County Airport | Morgan UT |
| 42V | Jones Airport | Benkelman NE |
| 42VA | Virginia Beach Airport | Virginia Beach VA |
| 42VT | Frogs End Airport | Shelburne VT |
| 42WA | Sheffels Ranch Airport | Wilbur WA |
| 42WI | Rusk County Memorial Heliport | Ladysmith WI |
| 42XS | Temple Ranch Airport | Freer TX |
| 43A | Montgomery County Airport | Star NC |
| 43AK | Kalmbach Airport | Wasilla AK |
| 43AL | Flat Rock Community Club Heliport | Flat Rock AL |
| 43AR | Haigwood Landing Strip Airport | Newport AR |
| 43AZ | Mtas 1 Heliport | Tonopah AZ |
| 43B | Deblois Flight Strip Airport | Deblois ME |
| 43CL | Dick Dale Skyranch Airport | Twentynine Palms CA |
| 43CN | Mazza Airport | Petaluma CA |
| 43D | Odessa Muni Airport | Odessa WA |
| 43FD | Cole's Seaplane Base | Kissimmee FL |
| 43FL | Fly'n R Ranch Airport | Umatilla FL |
| 43G | Belleville Airport | Belleville MI |
| 43GA | Henry Medical Center Inc Heliport | Stockbridge GA |
| 43I | Mississinewa Reservoir Landing Area Seaplane Base | Peru IN |
| 43IG | Grayland Intergalactic Airport | Grayland WA |
| 43II | Kirk Heliport | Merrillville IN |
| 43IN | Hepler Airport | St Wendel IN |
| 43IS | Igoe Heliport | Seymour IL |
| 43K | Marion Muni Airport | Marion KS |
| 43KS | Smith Airport | Manhattan KS |
| 43KY | Wlky-tv Studios Heliport | Louisville KY |
| 43L | Van Nuys County Court Heliport | Los Angeles CA |
| 43LA | Slay's Ultralight | Belcher LA |
| 43MI | West Gladstone Airport | Gladstone MI |
| 43MO | Riordan Airport | Pleasant Hill MO |
| 43NC | Bahnson Gliderport | Mocksville NC |
| 43NE | Onion Crest Airpark Airport | Riverdale NE |
| 43NR | Carolinas Medical Center Lincolnton Heliport | Lincolnton NC |
| 43OA | Anderson Airfield Airport | Bellbrook OH |
| 43OI | Windswept Airport | North Baltimore OH |
| 43OK | Biggs Skypatch Airport | Wellston OK |
| 43OR | Inspiration Airport | Bend OR |
| 43PA | Kolb Airport | Spring City PA |
| 43PN | E L Gruber Heliport | Pottstown PA |
| 43TA | Diamond Seven Ranch Airport | Morgan TX |
| 43TE | Police Headquarters Heliport | Houston TX |
| 43TN | Roseanne Airport | Morrison TN |
| 43TX | Mid-valley Dusters Inc Airport | Alamo TX |
| 43U | Mount Pleasant Airport | Mount Pleasant UT |
| 43WA | Wilson Heliport | Woodinville WA |
| 43WI | Eagle Ridge Ultralight | Colfax WI |
| 43XS | Tdcj/southern Rgnl Medical Facility Heliport | Texas City TX |
| 43Y | Northome Muni Airport | Northome MN |
| 44A | Rolle Airfield Airport | San Luis AZ |
| 44AK | West Papoose Lake Airpark Airport | Wasilla AK |
| 44AR | Air Evac Lifeteam 30 Heliport | Vilonia AR |
| 44AZ | Sandhill Ranch Airport | Page AZ |
| 44B | Charles A. Chase Jr. Memorial Field Airport | Dover/foxcroft ME |
| 44C | Beloit Airport | Beloit WI |
| 44CA | W R Byron Airport | Blythe CA |
| 44CN | Occidental Petroleum Heliport | Los Angeles CA |
| 44CO | Redlands Airport | Hotchkiss CO |
| 44FL | Martin Memorial Medical Center Heliport | Stuart FL |
| 44G | Betz Airport | Blissfield MI |
| 44GA | S&s Flying Service Airport | Pineview GA |
| 44ID | Boulder Creek Airstrip Airport | Donnelly ID |
| 44IL | Wilson Heliport | Minooka IL |
| 44KS | Vankirk Airport | Wichita KS |
| 44KY | Duff Airport | Chavies KY |
| 44L | Wilshire Area Heliport | Los Angeles CA |
| 44LA | B T & K H Ranch Airport | Dry Creek LA |
| 44LL | Carlinville Area Hospital Heliport | Carlinville IL |
| 44LS | Sheridan's Strip Airport | Ponchatoula LA |
| 44M | Tenkiller Lake Airpark Airport | Cookson OK |
| 44MD | Union Memorial Hospital Heliport | Baltimore MD |
| 44MI | Airbatco Field Airport | Mulliken MI |
| 44MO | Butch's Strip Airport | St Joseph MO |
| 44MU | Lynch Field Airport | Granby MO |
| 44N | Sky Acres Airport | Millbrook NY |
| 44NC | Broadway Airfield Airport | Landis NC |
| 44ND | Fredericks Ranch Airport | Halliday ND |
| 44NY | Tomcat Airport | Fort Plain NY |
| 44OH | Sjs Heliport | Cuyahoga Falls OH |
| 44OI | Perry Nuclear Power Plant Heliport | Painesville OH |
| 44OK | Sky High Airport | Crescent OK |
| 44OR | Compton Airport | Canby OR |
| 44PA | Pennfield Farm Airport | Spring Mills PA |
| 44PN | Sports Complex Of Honesdale Heliport | Honesdale PA |
| 44T | Hoskins Field Airport | Olympia WA |
| 44TA | Aero Crafter Inc Heliport | Princeton TX |
| 44TE | Shirley Williams Airport | Kingsland TX |
| 44TN | Stone Field Airport | Louisville TN |
| 44TS | Mc David Ranch Airport | Llano TX |
| 44TX | White Oak Airport | Fredericksburg TX |
| 44U | Salina-gunnison Airport | Salina UT |
| 44VA | Big Hill Airport | Eagle Rock VA |
| 44WA | Skyline Hospital Ems Heliport | White Salmon WA |
| 44WI | Stoiber Airport | Spencer WI |
| 44WY | Underwood Airport | Douglas WY |
| 44XS | Prudential Heliport | Bellaire TX |
| 45AA | Davidson Strip Airport | Talkeetna AK |
| 45AK | Cherokee Airport | Delta Junction AK |
| 45AR | Thunder Ridge Ranch Airport | Flippin AR |
| 45CL | Hell'er High Water Airport | Zenia CA |
| 45CN | Hermitage Airport | Groveland CA |
| 45CO | Ag-air Inc Heliport | Mead CO |
| 45FD | Baptist Medical Center/beaches Heliport | Jacksonville Beach FL |
| 45FL | Moss Meadows Airport | Live Oak FL |
| 45G | Brighton Airport | Brighton MI |
| 45IA | Great River Medical Center Heliport | West Burlington IA |
| 45ID | Fox Creek Airport | Priest River ID |
| 45II | Cummings Field Airport | Rolling Prairie IN |
| 45IL | Northwestern Lake Forest Hospital Heliport | Lake Forest IL |
| 45IN | Aerobatic Practice Airport | North Vernon IN |
| 45IS | Adventist Bolingbrook Hospital Heliport | Bolingbrook IL |
| 45K | Minneapolis City County Airport | Minneapolis KS |
| 45KS | Liebau Ranch Airport | Grenola KS |
| 45KY | Clinton County Hospital Heliport | Albany KY |
| 45L | Parker Center Heliport | Los Angeles CA |
| 45LA | Air Logistics (venice) N Heliport | Venice LA |
| 45MI | Franklin's Airport | Barbeau MI |
| 45MN | Kaml Airstrip Airport | Euclid MN |
| 45MO | Waldmeister Farm Airport | St Peters MO |
| 45MT | Pester Airport | Hingham MT |
| 45NC | Glover Airport | Seaboard NC |
| 45NH | Hayes Heliport | Raymond NH |
| 45NY | Turning Stone Resort & Casino Heliport | Verona NY |
| 45OG | Rugg Ranches Airport | Pilot Rock OR |
| 45OH | Boober Airport | New Richmond OH |
| 45OI | Plane Country Airport | Strasburg OH |
| 45OK | Belleview Landing Airport | South Coffeyville OK |
| 45OR | Benham Airport | Coquille OR |
| 45PA | Meadville Medical Center Heliport | Meadville PA |
| 45PN | Chambers Airport | Tunkhannock PA |
| 45R | Hawthorne Field Airport | Kountze/silsbee TX |
| 45S | Silver Lake F S Strip Airport | Silver Lake OR |
| 45TA | Spl Heliport | Houston TX |
| 45TE | Deussen Field Airport | Ponder TX |
| 45TN | Darnell's Landings Airport | Church Hill TN |
| 45TS | Bullhead Heliport | Llano TX |
| 45TX | West Airpark Airport | West TX |
| 45WA | Yakima Valley Memorial Hospital Heliport | Yakima WA |
| 45WI | Windsong Farm Airport | Woodville WI |
| 45WY | American Falconry Airport | Casper WY |
| 45XA | Buelah Airport | Seguin TX |
| 45XS | Ghost Apache Airport | Cotulla TX |
| 46AK | Bear Cove Farm Airport | Homer AK |
| 46AL | Sly Pig's Base Seaplane Base | Sylacauga AL |
| 46AR | Robert Chris Mc Intosh Airport | Sherwood AR |
| 46CA | Rancho Vallecito Airport | Julian CA |
| 46CL | A T & T Center Heliport | Los Angeles CA |
| 46CN | Crystal Airport | Llano CA |
| 46CO | Huerfano Ag Airport | Pueblo CO |
| 46D | Carrington Muni Airport | Carrington ND |
| 46FD | Tater Farms Strip Airport | Hastings FL |
| 46FL | Hospital Heliport | Titusville FL |
| 46GA | St Joseph's Hospital Heliport | Savannah GA |
| 46IA | Todd Field Airport | Ankeny IA |
| 46II | Porter Memorial Hospital Heliport | Valparaiso IN |
| 46IL | Mcdonough District Hospital Heliport | Macomb IL |
| 46KS | Hidden Valley Airport | Valley Center KS |
| 46KY | St Elizabeth-ft Thomas Hospital Heliport | Fort Thomas KY |
| 46LS | Venissat Airstrip Airport | Gueydan LA |
| 46MI | Cloud Nine West Airport | Webberville MI |
| 46MN | Perham Hospital Heliport | Perham MN |
| 46MS | Circle Bar Ranch Airport | Foxworth MS |
| 46N | Sky Park Airport | Red Hook NY |
| 46NC | Brown Field Airport | Marshville NC |
| 46NE | Jantzen Airport | Madrid NE |
| 46NJ | Perl Acres Airport | Clarksburg NJ |
| 46NY | Savannah Airport | Savannah NY |
| 46OH | Wetzl Airport | North Jackson OH |
| 46OR | Delamarter Heliport | Pendleton OR |
| 46PA | St Margaret Memorial Hospital Heliport | Pittsburgh PA |
| 46PN | D.r. Helicopters Heliport | Allentown PA |
| 46SC | Gaffney Airport | Gaffney SC |
| 46TA | Gould Strip Airport | Cotulla TX |
| 46TN | Pleasantville Pentacostal Church Heliport | Pleasantville TN |
| 46TS | Lavon North Airport | Dallas TX |
| 46TX | Phillips Corporation Airport | Angleton TX |
| 46U | Alpine Airport | Alpine WY |
| 46VA | Byrd Creek Airport | Caledonia VA |
| 46WA | Don Williams Private Heliport | Yakima WA |
| 46WI | Holy Family Hospital Heliport | New Richmond WI |
| 46XA | Flying A Heliport | Rhome TX |
| 46XS | Windy Hill Airport | Denton TX |
| 47AK | Highland Airport | Eagle River AK |
| 47AR | Mabry Field Ultralight | Melbourne AR |
| 47CA | Mountains Community Hospital Heliport | Lake Arrowhead CA |
| 47CL | Spears Heliport | San Fernando CA |
| 47CO | Mile Hi Airport | New Raymer CO |
| 47FD | Strayhorn Ranch Airport | Fort Myers FL |
| 47GA | Everidge Airport | Pinehurst GA |
| 47IN | Mann Airport | Merom IN |
| 47IS | Flying Z Ranch Airport | Durand IL |
| 47K | Moundridge Muni Airport | Moundridge KS |
| 47KS | Maxwell Airport | Baldwin City KS |
| 47KY | B. M. H. Heliport | Hardinsburg KY |
| 47LA | St Patrick Hospital Heliport | Lake Charles LA |
| 47M | Thornton Airport | Brownsville TN |
| 47MA | Devon Glen Heliport | Hamilton MA |
| 47MI | Kenneth Hayward Airport | Bay City MI |
| 47MN | Sons Private-commercial Airport | Norwood MN |
| 47N | Central Jersey Rgnl Airport | Manville NJ |
| 47NC | Windemere Airport | Fayetteville NC |
| 47NE | Bryan Lgh Medical Center Heliport | Lincoln NE |
| 47NJ | Metropolitan Electric Heliport | Clifton NJ |
| 47NY | Elk Creek Airport | Borden NY |
| 47OH | Chapin Airport | Norwalk OH |
| 47OI | Wadsworth-rittman Hospital Heliport | Wadsworth OH |
| 47OK | Harman Airport | Calumet OK |
| 47PA | Homan Airport | State College PA |
| 47PN | Bristol Usar Center Heliport | Bristol PA |
| 47TA | Pleasure Field Airport | Prosper TX |
| 47TE | Whites Airport | La Ward TX |
| 47TN | Cabin Pad Heliport | Paris TN |
| 47TS | Hensarling Airport | Madisonville TX |
| 47TX | Armstrong Ranch Airport | Armstrong TX |
| 47V | Curtis Muni Airport | Curtis NE |
| 47VA | Division Five Heliport | Chesapeake VA |
| 47WA | Fitz Pad 1 Heliport | Woodinville WA |
| 47WI | Oakbrook Airport | Fort Atkinson WI |
| 47XA | Luv Field Airport | Taylor TX |
| 47XS | Bartos Farm Airport | Lubbock TX |
| 47Y | Pelican Rapids Muni-lyon's Field Airport | Pelican Rapids MN |
| 48A | Cochran Airport | Cochran GA |
| 48AK | Castle Mountain Airstrip Airport | Chickaloon AK |
| 48AZ | Rimrock Airport | Rimrock AZ |
| 48CA | Huntington Beach Service Center Heliport | Westminster CA |
| 48CL | Grass Valley Service Center Heliport | Grass Valley CA |
| 48CO | Shaull Farm Airstrip Airport | Nunn CO |
| 48D | Clare Muni Airport | Clare MI |
| 48FD | Delray Community Hosp Emergency Helistop Heliport | Delray Beach FL |
| 48FL | Mc Kinnon Airpark Airport | Walnut Hill FL |
| 48G | Gavagan Fld Airport | Yale MI |
| 48GA | Fairview Park Hospital Heliport | Dublin GA |
| 48I | Braxton County Airport | Sutton WV |
| 48IN | 123 Arcom Heliport | Indianapolis IN |
| 48IS | P.j. Killian Airport | Lexington IL |
| 48K | Ness City Muni Airport | Ness City KS |
| 48KY | Westlake Regional Hospital Heliport | Columbia KY |
| 48LA | Chevron Place Heliport | New Orleans LA |
| 48LL | Rock Cut Farms Airport | Leaf River IL |
| 48LS | Our Lady Of Lourdes Rgnl Medical Center Heliport | Lafayette LA |
| 48MD | Le Champ Airport | Princess Anne MD |
| 48MI | Manju Heliport | Dorr MI |
| 48MN | Northfield Hospital Heliport | Northfield MN |
| 48MO | Lions Emergency Evac Heliport | California MO |
| 48MT | The Landing Zone Heliport | Stevensville MT |
| 48NC | Morrison Field Airport | Lexington NC |
| 48ND | Schirmeister Private Airport | Hazelton ND |
| 48NE | Valley Fire/rescue Dist & Emerg Service Heliport | Valley NE |
| 48NH | Winter Harbor Seaplane Base | Wolfeboro NH |
| 48NJ | Southern Training Center Heliport | Salem NJ |
| 48NY | Tennessee Gas Nr 2 Heliport | Hamburg NY |
| 48OH | Dechant Farms Airport | Oberlin OH |
| 48OI | Mansfield Cpc Heliport | Mansfield OH |
| 48OR | Lookingglass Airport | Roseburg OR |
| 48P | Rocky Hill Ultralight | Cresco PA |
| 48PA | Veterans Heliport | Tower City PA |
| 48PN | Wilson Heliport | Spring Grove PA |
| 48S | Harlem Airport | Harlem MT |
| 48SN | Lifeteam 20 Heliport | Wichita KS |
| 48TA | Hamlin Memorial Hospital Heliport | Hamlin TX |
| 48TE | 4m Ranch Airfield Airport | Langtry TX |
| 48TS | Fox Airport | New Braunfels TX |
| 48TX | Tri-county Aerodrome Airport | Trenton TX |
| 48U | Gtr Green River Intergalactic Spaceport Airport | Green River WY |
| 48VA | Al's Field Airport | Gore VA |
| 48VT | Cub Cove Seaplane Base | Colchester VT |
| 48WA | West Valley Airport | Yakima WA |
| 48WI | Circle A Ranch Airport | Hazelhurst WI |
| 48X | Airport Manatee Airport | Palmetto FL |
| 48XA | Spring Ranch Airport | Cisco TX |
| 48XS | Maravillas Gap Ranch Airport | Marathon TX |
| 48Y | Piney Pinecreek Border Airport | Pinecreek MN |
| 49A | Gilmer County Airport | Ellijay GA |
| 49AK | Secluded Lake Airport | Talkeetna AK |
| 49B | Sturgis Muni Airport | Sturgis SD |
| 49C | Camp Lake Airport | Camp Lake WI |
| 49CA | Texaco Platform Habitat Heliport | Carpinteria CA |
| 49CL | El Peco Ranch Airport | Madera CA |
| 49CN | Rancho Tehama Airport | Red Bluff CA |
| 49CO | Air Dusters Inc Airport | Roggen CO |
| 49F | Rankin Airport | Rankin TX |
| 49FA | North Port Fire Rescue Station 81 Heliport | North Port FL |
| 49FD | Watson Farm Airport | Quincy FL |
| 49FL | Mike's Ag Air Airport | Walnut Hill FL |
| 49G | Wend Valley Airport | Charlotte MI |
| 49GA | Southern Rgnl Medical Center Heliport | Riverdale GA |
| 49II | Reinoehl Field Airport | Lena IN |
| 49IL | Walnut Creek Airport | Somonauk IL |
| 49IN | Drake Airport | Sullivan IN |
| 49IS | Katherine Shaw Bethea Hospital Heliport | Dixon IL |
| 49K | Norwich Airport | Norwich KS |
| 49KS | N & N Airport | Manhattan KS |
| 49KY | Morning Star Heliport | Lexington KY |
| 49LA | Woman's Hospital Heliport | Baton Rouge LA |
| 49LL | Decatur Conference Center And Hotel Heliport | Decatur IL |
| 49MN | Willow Ridge Airport | Hastings MN |
| 49MO | Hermann Ii Heliport | St Louis MO |
| 49N | Lufker Airport | East Moriches NY |
| 49NC | Wilkes Rgnl Medical Center Heliport | North Wilkesboro NC |
| 49NJ | Bertino Heliport | Hammonton NJ |
| 49NY | Westmoreland Airport | Shelter Island NY |
| 49OI | Delaware Operations Heliport | Toledo OH |
| 49OK | Holdenville General Hospital Heliport | Holdenville OK |
| 49OR | Land's Inn Ranch Airport | Dayville OR |
| 49PA | Gap View Airport | Stone Church PA |
| 49PN | Geisinger Heliport | Danville PA |
| 49R | Real County Airport | Leakey TX |
| 49S | Babb Airport | Babb MT |
| 49T | Dallas Cbd Vertiport Heliport | Dallas TX |
| 49TA | Roeder Airport | Crosby TX |
| 49TE | K Star Ranch Airport | Brenham TX |
| 49TN | Sweetwater Fd Heliport | Sweetwater TN |
| 49TS | E D S Heliport | Plano TX |
| 49TX | Valley Baptist Medical Center Heliport | Harlingen TX |
| 49U | Shoshoni Muni Airport | Shoshoni WY |
| 49VA | Rappahannock General Hospital Heliport | Kilmarnnock VA |
| 49WA | Cougar Mountain Airfield Airport | Yelm WA |
| 49X | Chemehuevi Valley Airport | Chemehuevi Valley CA |
| 49XA | Omni Ranch Ultralight | Edinburg TX |
| 49XS | Mccasland Ranch Airport | Star TX |
| 4A0 | Berry Hill Airport | Stockbridge GA |
| 4A2 | Atmautluak Airport | Atmautluak AK |
| 4A3 | Lake Lucille Seaplane Base | Wasilla AK |
| 4A4 | Polk County Airport- Cornelius Moore Field Airport | Cedartown GA |
| 4A5 | Searcy County Airport | Marshall AR |
| 4A6 | Scottsboro Muni-word Field Airport | Scottsboro AL |
| 4A7 | Atlanta South Rgnl Airport | Atlanta GA |
| 4A9 | Isbell Field Airport | Fort Payne AL |
| 4AA4 | South Peninsula Hospital Heliport | Homer AK |
| 4AK | Livengood Camp Airport | Livengood AK |
| 4AK0 | Niklason Lake Seaplane Base | Wasilla AK |
| 4AK1 | Inigok Airport | Deadhorse AK |
| 4AK2 | St John Homestead Airport | Wasilla AK |
| 4AK3 | Long Lake Airport | Long Lake AK |
| 4AK5 | Mankomen Lake Airport | Mankomen Lake AK |
| 4AK6 | Wolf Lake Airport | Palmer AK |
| 4AK7 | Aleknagik Mission Strip Airport | Aleknagik AK |
| 4AK8 | Napaimute Pioneer Airfield Airport | Napaimute AK |
| 4AK9 | Tibbetts Airport | Naknek AK |
| 4AL4 | Froberg Heliport | Hartselle AL |
| 4AL5 | J5 Mike Airport | Woodville AL |
| 4AL6 | Bonner Field Airport | Summerdale AL |
| 4AL7 | Leon's Landing Airport | Flat Rock AL |
| 4AL8 | Milton Airport | Huntsville AL |
| 4AL9 | T W Spear Memorial Airport | Lapine AL |
| 4AR0 | St Mary's Rgnl Medical Center Heliport | Russellville AR |
| 4AR1 | Shurley Field Airport | Cabot AR |
| 4AR2 | Red Oak Airport | Cabot AR |
| 4AR3 | Conway Rgnl Health System Heliport | Conway AR |
| 4AR5 | Lawrence Field Gliderport | Cherry Valley AR |
| 4AR6 | Williams Ranch Airport | Caddo Gap AR |
| 4AR8 | Washington Rgnl Landing Heliport | Fayetteville AR |
| 4AZ0 | Palm Valley Tucson Airport | Tucson AZ |
| 4AZ1 | Moulder Heliport | Surprise AZ |
| 4AZ2 | Block Ranch Airport | Capitan NM |
| 4AZ3 | Tonto Ranger Station Heliport | Roosevelt AZ |
| 4AZ4 | Fort Omotse Heliport | Tombstone AZ |
| 4AZ5 | New Waddell Dam Heliport | Phoenix AZ |
| 4AZ6 | Parsons Field Airport | Kingman AZ |
| 4AZ7 | San Carlos Airport | San Carlos AZ |
| 4AZ8 | The Ultralight Strip Ultralight | Marana AZ |
| 4AZ9 | Leroy Airport | Willcox AZ |
| 4B0 | South Albany Airport | South Bethlehem NY |
| 4B1 | Duanesburg Airport | Duanesburg NY |
| 4B6 | Ticonderoga Muni Airport | Ticonderoga NY |
| 4B7 | Schroon Lake Airport | Schroon Lake NY |
| 4B8 | Robertson Field Airport | Plainville CT |
| 4B9 | Simsbury Airport | Simsbury CT |
| 4C1 | Flying U Ranch Airport | Union Mills IN |
| 4C2 | Walker/rowe Waterloo Airport | Waterloo IN |
| 4C3 | Yalesville Heliport | Yalesville CT |
| 4C4 | Gifford Field Airport | Colebrook NH |
| 4C7 | Ackley Muni Airport | Ackley IA |
| 4C8 | Albia Muni Airport | Albia IA |
| 4CA0 | Lapd Hooper Heliport | Los Angeles CA |
| 4CA1 | City National Bank Heliport | Los Angeles CA |
| 4CA2 | Funny Farm Airport | Brentwood CA |
| 4CA3 | Camp Parks Heliport | Pleasanton CA |
| 4CA4 | St Francis Medical Center Helistop Heliport | Lynwood CA |
| 4CA5 | Childrens Hospital Of Orange County Heliport | Orange CA |
| 4CA6 | Chevron Refinery Heliport | El Segundo CA |
| 4CA7 | Johnsen Airport | Chico CA |
| 4CA9 | Randy Champe-gary Howe Memorial Heliport | Los Angeles CA |
| 4CD0 | Parkview Medical Center West Heliport | Pueblo CO |
| 4CL1 | Lyon Heliport | Rancho Santa Margarita CA |
| 4CL3 | Antelope Valley Ranch Airport | Williams CA |
| 4CL5 | Mercy San Juan Hospital Heliport | Carmichael CA |
| 4CL6 | Pat Coyle Memorial Heliport | San Marcos CA |
| 4CL7 | Inyo County Sheriff Search & Rescue Heliport | Bishop CA |
| 4CL8 | Hanford Community Medical Center Helistop Heliport | Hanford CA |
| 4CL9 | Arrowhead Rgnl Medical Center Heliport | Colton CA |
| 4CN7 | Children's Hospital Of Los Angeles Ii Heliport | Los Angeles CA |
| 4CO0 | Glen-aspen Airport | Carbondale CO |
| 4CO1 | Lockheed Martin Heliport | Waterton CO |
| 4CO2 | Owl Canyon Gliderport | Wellington CO |
| 4CO3 | Griffin Field Airport | Walsh CO |
| 4CO4 | St Anthony North Heliport | Westminster CO |
| 4CO5 | Pioneers Heliport | Meeker CO |
| 4CO6 | Lutheran Medical Center Heliport | Wheat Ridge CO |
| 4CO7 | Ambrosich Field Airport | Elbert CO |
| 4CO8 | Kelgun Airport | Castle Rock CO |
| 4CO9 | Beaver Creek Heliport | Beaver Creek CO |
| 4D0 | Abrams Muni Airport | Grand Ledge MI |
| 4D1 | Three Castles Airpark Airport | Wonewoc WI |
| 4D8 | Fuller Airport | Milford IA |
| 4D9 | Alma Muni Airport | Alma NE |
| 4E7 | Ellendale Muni Airport | Ellendale ND |
| 4E8 | Richardton Airport | Richardton ND |
| 4F1 | Westport Airport | Westport OK |
| 4F2 | Panola County-sharpe Field Airport | Carthage TX |
| 4F7 | Kizer Field Airport | Prescott AR |
| 4F8 | Wilson Airport | Stephens AR |
| 4F9 | La Moure Rott Muni Airport | La Moure ND |
| 4FA3 | Tranquility Bay Strip Airport | Fort Myers FL |
| 4FD3 | The Wright Place Airport | Homestead FL |
| 4FD4 | Bay Seaplanes Seaplane Base | Panama City FL |
| 4FD5 | Grand Lagoon Seaplane Base | Panama City FL |
| 4FD6 | Pine Island Helistop Heliport | Pine Island Center FL |
| 4FD7 | Flanders Field Airport | Polk City FL |
| 4FD8 | Captiva Heliport | Sanibel FL |
| 4FD9 | Bowman's Beach Helistop Heliport | Sanibel FL |
| 4FL0 | Turkey Scratch Plantation Airport | Lamont FL |
| 4FL1 | Escape Ranch Airport | Kenansville FL |
| 4FL2 | Ko-kee Airport | Bushnell FL |
| 4FL3 | Fellsmere Airport | Fellsmere FL |
| 4FL5 | Ridge Landing Airport | Frostproof FL |
| 4FL6 | Florida Hospital Heliport | Daytona Beach FL |
| 4FL7 | Physicians Rgnl Med Ctr-collier Blvd Heliport | Naples FL |
| 4FL8 | Schwartz Farms Inc Airport | Sarasota FL |
| 4FL9 | Gore Airport | Haines City FL |
| 4G0 | Pittsburgh-monroeville Airport | Monroeville PA |
| 4G1 | Greenville Muni Airport | Greenville PA |
| 4G2 | Hamburg Inc Airport | Hamburg NY |
| 4G3 | Miller Airport | Alliance OH |
| 4G4 | Youngstown Elser Metro Airport | Youngstown OH |
| 4G5 | Monroe County Airport | Woodsfield OH |
| 4G7 | Fairmont Muni-frankman Field Airport | Fairmont WV |
| 4G8 | Columbia Airport | Columbia Station OH |
| 4GA1 | Thacker Field Airport | Concord GA |
| 4GA2 | Medical College Of Georgia Heliport | Augusta GA |
| 4GA3 | Memorial Hospital Heliport | Bainbridge GA |
| 4GA4 | R.m. Harris Airport | Eton GA |
| 4GA5 | Peterson Field Airport | Plains GA |
| 4GA6 | Chattahoochee Air Park Airport | Douglasville GA |
| 4GA7 | Kitchens Field Airport | Griffin GA |
| 4GA8 | Andrews Airport | Arlington GA |
| 4GA9 | Ebeneezer Airport | Cumming GA |
| 4GE1 | Viola Farm Airport | Attapulgus GA |
| 4GE3 | Whitehall Airport | Montrose GA |
| 4H1 | Schaumburg Muni Helistop Heliport | Chicago/schaumburg IL |
| 4I0 | Mingo County Airport | Williamson WV |
| 4I3 | Knox County Airport | Mount Vernon OH |
| 4I7 | Putnam County Airport | Greencastle IN |
| 4I9 | Morrow County Airport | Mount Gilead OH |
| 4IA0 | Greater Community Hospital Heliport | Creston IA |
| 4IA1 | Ellsworth Muni Hospital Heliport | Iowa Falls IA |
| 4IA2 | Walker Field Airport | West Liberty IA |
| 4IA3 | Floyd County Memorial Hospital Heliport | Charles City IA |
| 4IA4 | Mccoy Airport | Danville IA |
| 4IA5 | Wright Medical Center Heliport | Clarion IA |
| 4IA7 | Witcombe Field Airport | Cedar Falls IA |
| 4IA8 | Weiss Airport | Williamsburg IA |
| 4II0 | De Ford Airport | Delphi IN |
| 4II2 | Hangar Fly Ultralight Fly Club Ultralight | Lawrence IN |
| 4II3 | Oleo Airport | Fillmore IN |
| 4II4 | Chesak Airport | North Judson IN |
| 4II5 | Escc Heliport | Hammond IN |
| 4II8 | Willis Airport | Greenfield IN |
| 4II9 | Shultz /private/ Airport | Brookston IN |
| 4IL0 | Litchfield West Side Emergency Services Heliport | Litchfield IL |
| 4IL2 | Wayne Ziller Jr Airport | Fairbury IL |
| 4IL3 | Thrifty Acres Airport | Stillman Valley (byron) IL |
| 4IL4 | Kuebler Rla Airport | St Elmo IL |
| 4IL5 | Frank's Flying Service Airport | Morrison IL |
| 4IL6 | St. Mary's Good Samaritan Heliport | Mt. Vernon IL |
| 4IL7 | Brussels Heliport | Brussels IL |
| 4IL8 | Rendleman Airport | Murphysboro IL |
| 4IL9 | Unzicker Airport | Benson IL |
| 4IN0 | Blackford Community Hospital Heliport | Hartford City IN |
| 4IN3 | East Clear Heliport | Clear Lake IN |
| 4IN4 | Wilson Airport | Wallace IN |
| 4IN5 | Ball Field Airport | Bourbon IN |
| 4IN6 | Dragons Den Heliport | Danvillle IN |
| 4IN7 | Riley Fld Airport | Attica IN |
| 4IN8 | Culp Farms Airport | Rensselaer IN |
| 4IN9 | Wawasee Airport | Syracuse IN |
| 4IS0 | Joan Graves Edwards Heliport | Anna IL |
| 4IS1 | Plain Crazy Airport | Carthage IL |
| 4IS2 | Memorial Hospital Heliport | Chester IL |
| 4IS3 | University Of Chicago Hospitals Heliport | Chicago IL |
| 4IS4 | Harrisburg Medical Center Heliport | Harrisburg IL |
| 4IS5 | Smith Rla Airport | Hecker IL |
| 4IS6 | Hattan Farms Airport | Minonk IL |
| 4IS7 | Litchfield Rla Airport | Seymour IL |
| 4IS8 | Leigh Farm Airport | Sparland IL |
| 4IS9 | Weidner Airport | Bunker Hill IL |
| 4J1 | Brantley County Airport | Nahunta GA |
| 4J2 | Berrien Co Airport | Nashville GA |
| 4J5 | Quitman Brooks County Airport | Quitman GA |
| 4J6 | St Marys Airport | St Marys GA |
| 4J8 | Treutlen County Airport | Soperton GA |
| 4K0 | Pedro Bay Airport | Pedro Bay AK |
| 4K3 | Lexington Muni Airport | Lexington MO |
| 4K5 | Ouzinkie Airport | Ouzinkie AK |
| 4K6 | Bloomfield Muni Airport | Bloomfield IA |
| 4KA | Tununak Airport | Tununak AK |
| 4KS | Walz Airport | Kiowa KS |
| 4KS1 | Amar Farms Airport | Wellsville KS |
| 4KS2 | Ingels Aerodrome Airport | De Soto KS |
| 4KS5 | Maize Airport | Wichita/maize/ KS |
| 4KS6 | Thomsen Field Airport | Hartford KS |
| 4KS7 | Butler Airpark Airport | Rose Hill KS |
| 4KS8 | Bursch Private Airport | Bird City KS |
| 4KY0 | J & C Antique Airfield Airport | Hardin KY |
| 4KY1 | Creek Side Landing Airport | Glasgow KY |
| 4KY2 | Manchester Memorial Hospital Heliport | Manchester KY |
| 4KY3 | West Heliport | Burlington KY |
| 4KY4 | Moseley Field Airport | Calhoun KY |
| 4KY5 | Weavers Run Airport | West Point KY |
| 4KY6 | Jennie Stuart Medical Center Heliport | Hopkinsville KY |
| 4KY7 | Mueller Farm Airport | Verona KY |
| 4KY8 | Shady Acres Airport | Shepherdsville KY |
| 4KY9 | King's Daughters Medical Center Heliport | Ashland KY |
| 4LA0 | Port Sulphur Seaplane Base | Port Sulphur LA |
| 4LA1 | Chevron Fourchon Heliport | Leeville LA |
| 4LA2 | Green Hill Compressors Heliport | Leeville LA |
| 4LA3 | Jackson Airport | Jackson LA |
| 4LA4 | Chevron Usa Inc Heliport | Leeville LA |
| 4LA5 | La Haye Center Heliport | Lafayette LA |
| 4LA6 | Little Lake Heliport | Lafitte LA |
| 4LA7 | West Jefferson Medical Center Heliport | Marrero LA |
| 4LA8 | Overton Private Airport | Clinton LA |
| 4LA9 | Blouin Flightpark Ultralight | Raceland LA |
| 4LL0 | Ranken Airport | Steward IL |
| 4LL1 | Staton Airport | Steward IL |
| 4LL4 | Enjoy Field Ultralight | Chebanse IL |
| 4LL7 | Willadae Farms Airport | Sycamore IL |
| 4LL8 | Colonial Acres Airport | Sycamore IL |
| 4LL9 | Alan B. Janssen Airport | Morrisonville IL |
| 4M0 | Lake Ann Airway Estates Airport | Traverse City MI |
| 4M1 | Carroll County Airport | Berryville AR |
| 4M2 | Booneville Muni Airport | Booneville AR |
| 4M3 | Carlisle Muni Airport | Carlisle AR |
| 4M4 | Shady Lawn Field Airport | Bannister MI |
| 4M5 | Dermott Muni Airport | Dermott AR |
| 4M7 | Russellville-logan County Airport | Russellville KY |
| 4M8 | Clarendon Muni Airport | Clarendon AR |
| 4M9 | Corning Muni Airport | Corning AR |
| 4MA0 | Burke Heliport | Sherborn MA |
| 4MA1 | Bangs Heliport | Wareham MA |
| 4MA3 | Millbury Savings/west Heliport | Millbury MA |
| 4MA4 | J K L Heliport | New Bedford MA |
| 4MA6 | Pleasant Beach Heliport | Cohasset MA |
| 4MA7 | Ahearn Heliport | Ludlow MA |
| 4MA8 | Pg Heliport | Quincy MA |
| 4MD | Pier 7 Heliport | Baltimore MD |
| 4MD0 | Mears Creek Airfield Airport | Lusby MD |
| 4MD1 | Bunting's Field Airport | Berlin MD |
| 4MD2 | Ward's Airport | Oakland MD |
| 4MD3 | Carey Field Airport | Bishopville MD |
| 4MD4 | Clements Airport | Clements MD |
| 4MD6 | Moxley's Airport | Dublin MD |
| 4MD7 | Catoctin Crosswind Airport | Thurmont MD |
| 4MD8 | Ijamsville Airport | Frederick MD |
| 4MD9 | St John Airport | Owings Mills MD |
| 4ME4 | Lovewell Pond Seaplane Base | Fryeburg ME |
| 4MI0 | Kriewall Strip Airport | Romeo MI |
| 4MI1 | Air Rahe Airport | Petersburg MI |
| 4MI4 | Whitcomb Field Airport | Schoolcraft MI |
| 4MI5 | Bps Heliport | Ruby MI |
| 4MI6 | Benedick Airport | Three Oaks MI |
| 4MI7 | Witbeck Aerodrone Airport | Farwell MI |
| 4MI8 | Darrell's Landing Airport | Croswell MI |
| 4MI9 | Bixby Hospital Heliport | Adrian MI |
| 4MN2 | Coot Landing Airport | Barnsville MN |
| 4MN3 | Lexington Heliport | Ham Lake MN |
| 4MN4 | Mulder Field Inc Airport | Ivanhoe MN |
| 4MN5 | Kapaun-wilson Field Airport | Graceville MN |
| 4MN7 | Burk Airport | Amboy MN |
| 4MN8 | Myers Field Airport | Pequot Lakes MN |
| 4MN9 | Huntersville Field Airport | Menahga MN |
| 4MO1 | Wehrman Airport | Montgomery City MO |
| 4MO2 | Newcomb Hereford Ranch Airport | Lancaster MO |
| 4MO3 | Schneider Field Airport | La Plata MO |
| 4MO4 | Liberty Landing Airport | Liberty MO |
| 4MO6 | Mark Twain Air Park Airport | Louisiana MO |
| 4MO7 | Crop Care Airport | Mound City MO |
| 4MO8 | Martens Airport | Atherton MO |
| 4MO9 | Friends Field Airport | Lone Jack MO |
| 4MS0 | Payne Airport | Pelahatchie MS |
| 4MS1 | Robinsonville Heliport | Robinsonville MS |
| 4MS2 | Dogwood Acres Airport | Raymond MS |
| 4MS3 | Jeter Field Airport | Sladen MS |
| 4MS4 | Spearman Field Airport | Shannon MS |
| 4MS5 | Bird Nest Airport | Lucedale MS |
| 4MS6 | University Of Mississippi Medical Center Heliport | Jackson MS |
| 4MS8 | Casino Center Heliport | Tunica MS |
| 4MS9 | Providence Airpark Airport | Canton MS |
| 4MT1 | Kreikemeier Airport | Belgrade MT |
| 4MT8 | Brier Patch Airport | Stevensville MT |
| 4N0 | Newman's Airport | Kalamazoo MI |
| 4N1 | Greenwood Lake Airport | West Milford NJ |
| 4N2 | Middlesex Valley Airport | Middlesex NY |
| 4N4 | Lidgerwood Muni Airport | Lidgerwood ND |
| 4N7 | Greene Airport | Greene NY |
| 4NA0 | Lindvig Airstrip Airport | Williston ND |
| 4NA1 | Ring Rock Ranch Airport | Williston ND |
| 4NA3 | Peterson Airstrip Airport | Antler ND |
| 4NA5 | Berg Strip Airport | Berthold ND |
| 4NA6 | Nicks Landing Airport | Grenora ND |
| 4NC0 | Boyd's Hawks Creek Airport | Mocksville NC |
| 4NC1 | Futuristics Heliport | Milton NC |
| 4NC2 | Bay Creek Airport | Bayboro NC |
| 4NC3 | Windsor Farms Airport | Linden NC |
| 4NC4 | Lowe's Mooresville Heliport | Mooresville NC |
| 4NC5 | Triple M Airport | Cape Carteret NC |
| 4NC6 | Cane Creek Airport | Fletcher NC |
| 4NC7 | Peacock Airport | Garner NC |
| 4NC8 | Buffalo Creek Airport | Concord NC |
| 4NC9 | Lz Carroll Airport | Gold Hill NC |
| 4ND1 | Knutson Airport | Thompson ND |
| 4ND4 | Pfau Pvt Airport | Upham ND |
| 4ND8 | Sanden Airport | Wyndmere ND |
| 4NE0 | Regier Brothers Airport | Madrid NE |
| 4NE1 | Mc Millan Ranch Airport | Milburn NE |
| 4NE3 | Simon Heliport | North Platte NE |
| 4NE8 | Malone M-bar Ranch Airport | Palisade NE |
| 4NE9 | Holzfaster's Airport | Paxton NE |
| 4NJ0 | Windward Farms Airport | Rosemont NJ |
| 4NJ1 | Somerset Medical Center Heliport | Somerville NJ |
| 4NJ3 | Seabrook Heliport | Salem NJ |
| 4NJ4 | Pse & G Trenton Distribution Helistop Heliport | Lawrenceville NJ |
| 4NJ5 | Raritan Center Heliport | Sayreville NJ |
| 4NJ6 | Vineland Veterans Home Heliport | Vineland NJ |
| 4NJ8 | Peters Airport | Somerville NJ |
| 4NK0 | Wca Hospital Heliport | Jamestown NY |
| 4NK2 | Tracy Field Airport | Greenwich NY |
| 4NK3 | Evans Airways Airport | Evans NY |
| 4NK4 | Woodford Airfield Airport | Fabius NY |
| 4NK5 | Harvs Airport | Macedon NY |
| 4NK6 | Ag-alley Airport | Marion NY |
| 4NK7 | Lightning Tree Farm Heliport | Millbrook NY |
| 4NK8 | Longwell Airport | Amsterdam NY |
| 4NK9 | Corporate Park Of Staten Island Heliport | Staten Island NY |
| 4NY0 | Mountain View Airpark Airport | Beekmantown NY |
| 4NY1 | Orange Poultry Farm Airport | Chester NY |
| 4NY2 | Edo Seaplane Base | College Point NY |
| 4NY3 | Greenville Mountain Heliport | Port Jervis NY |
| 4NY4 | Cross' Farm Airport | Delmar NY |
| 4NY5 | Bistrians Heliport | East Hampton NY |
| 4NY6 | Station 237 Heliport | Clifton Springs NY |
| 4NY7 | South Cairo Airport | South Cairo NY |
| 4NY8 | Harris Hill Gliderport | Elmira NY |
| 4NY9 | Belmont Park Heliport | Elmont NY |
| 4O1 | Snyder Airport | Snyder OK |
| 4O4 | Mc Curtain County Rgnl Airport | Idabel OK |
| 4O5 | Cherokee Muni Airport | Cherokee OK |
| 4O6 | Cherokee Seaplane Base | Afton OK |
| 4O7 | Decker Field Airport | Meno OK |
| 4OA1 | Fairfield Medical Center Heliport | Lancaster OH |
| 4OA8 | Bowman Airport | Piqua OH |
| 4OH0 | Black Heliport | Tipp City OH |
| 4OH1 | Sky Haven Airport | Madison OH |
| 4OH2 | Bethesda Hospital Helistop Heliport | Zanesville OH |
| 4OH3 | Bieber Field Airport | North Lima OH |
| 4OH4 | Millertime Airport | Orient OH |
| 4OH6 | Wingfoot Lake Airship Operations Balloonport | Akron Suffield OH |
| 4OH7 | Holzer Heliport | Gallipolis OH |
| 4OH8 | Huffman Farm Airport | Archbold OH |
| 4OH9 | Bellevue Hospital Heliport | Bellevue OH |
| 4OI0 | Flower Hospital Heliport | Sylvania OH |
| 4OI1 | Petro Heliport | Zanesville OH |
| 4OI3 | Horizons Heliport | Cincinnati OH |
| 4OI7 | R & M Aviation Airport | Avon OH |
| 4OI8 | Brocker Field Airport | Canfield OH |
| 4OI9 | Baisden Airport | Coalton OH |
| 4OK3 | St Francis Hospital Heliport | Tulsa OK |
| 4OK4 | Low Pass Airport | Tuttle OK |
| 4OK5 | Newman Farm Airport | Velma OK |
| 4OK9 | Hsi Heliport | Cushing OK |
| 4OR0 | Springbrook Airport | Rogue River OR |
| 4OR1 | Mcnary Arng Fld Heliport | Salem OR |
| 4OR3 | Lambert Field Airport | Albany OR |
| 4OR4 | Schrock Airport | Corvallis OR |
| 4OR5 | Fly 'n' W Airport | Salem OR |
| 4OR6 | Stargazer Field Airport | Sandy OR |
| 4OR7 | Lusardi Field Airport | Salem OR |
| 4OR8 | Wagoner Airport | Salem OR |
| 4P2 | Old Portage Heliport | Akron OH |
| 4P3 | Flandreau Muni Airport | Flandreau SD |
| 4P5 | Franks Seaplane Base | Lac Du Flambeau WI |
| 4PA0 | Flicksville Heliport | Flicksville PA |
| 4PA1 | Sauers-haven Airport | New Berlin PA |
| 4PA2 | Warner-lambert Heliport | Lititz PA |
| 4PA4 | Lock Haven Hospital Heliport | Lock Haven PA |
| 4PA5 | Ponderosa Airport | Lock Haven PA |
| 4PA6 | Hiawatha Airport | Starlight PA |
| 4PA8 | Russo Airstrip Airport | Pipersville PA |
| 4PA9 | Macungie Mack Heliport | Macungie PA |
| 4PN0 | Flying M Ranch Airport | Grove City PA |
| 4PN3 | Gallatin Fuel Heliport | Masontown PA |
| 4PN4 | Muddy Run Heliport | Holtwood PA |
| 4PN5 | Brigham Heliport | Erwinna PA |
| 4PN6 | Williams Grove Heliport | Mechanicsburg PA |
| 4PN7 | Merritt Field Airport | Eagles Mere PA |
| 4PN8 | C.j.k. Airport | Tunkhannock PA |
| 4PS3 | Paraport Ultralight | Warren PA |
| 4PS4 | Mountain Top Airport | Chadds Ford PA |
| 4PS5 | Muddy Creek Airport | Carmicheal PA |
| 4PS7 | Cohen Airport | Oxford PA |
| 4PS8 | Coatesville Heliport | Coatesville PA |
| 4PS9 | Ferrante Heliport | Vandergrift PA |
| 4R1 | I H Bass Jr Memorial Airport | Lumberton MS |
| 4R3 | Jackson Muni Airport | Jackson AL |
| 4R5 | Major Gilbert Field Airport | La Pointe WI |
| 4R6 | Milnor Muni Airport | Milnor ND |
| 4R7 | Eunice Airport | Eunice LA |
| 4R9 | Dauphin Island Airport | Dauphin Island AL |
| 4S1 | Gold Beach Muni Airport | Gold Beach OR |
| 4S2 | Ken Jernstedt Airfield Airport | Hood River OR |
| 4S4 | Skyport Airport | Cornelius OR |
| 4S5 | St Thomas Muni Airport | St Thomas ND |
| 4S6 | Tieton State Airport | Rimrock WA |
| 4S7 | Malin Airport | Malin OR |
| 4S9 | Mulino State Airport | Portland-mulino OR |
| 4SC4 | Davis Field Ultralight | Liberty SC |
| 4SC7 | Wexford Landing Airport | Aiken SC |
| 4SD4 | Dan's Airport | Rapid City SD |
| 4T2 | Kenneth Copeland Airport | Fort Worth TX |
| 4T7 | Little C Ranch Heliport | Hico TX |
| 4TA0 | Prairie Aire Field Airport | Damon TX |
| 4TA1 | Warschun Ranch Airport | Denton TX |
| 4TA3 | Costello Island, Inc Airport | Graham TX |
| 4TA4 | Pea Patch Airport | Hempstead TX |
| 4TA5 | Lucky G Airport | Holliday TX |
| 4TA6 | Comanche Caves Ranch Airport | Hunt TX |
| 4TA7 | Oak Ridge Heliport | Ingleside TX |
| 4TA8 | Perry Ranch Airport | Ozona TX |
| 4TA9 | Swinging Door Heliport | Richmond TX |
| 4TE2 | Lewis Private Airport | Del Rio TX |
| 4TE3 | Finley Ranch Airport | Claude TX |
| 4TE4 | Taurus Mesa Airport | Alpine TX |
| 4TE5 | Dell City Heliport | Dell City TX |
| 4TE7 | Devil's River Ranch Airport | Del Rio TX |
| 4TE8 | Ben Bruce Memorial Airpark Airport | Evadale TX |
| 4TE9 | Squirrel Creek Ranch Airport | D'hanis TX |
| 4TN0 | Melton Field Airport | Blaine TN |
| 4TN2 | Buck Creek Ranch Airport | Crossville TN |
| 4TN3 | Hawks Nest Airport | Moscow TN |
| 4TN4 | Cotton Field Airport | Eads TN |
| 4TN7 | Bmh-h Heliport | Huntingdon TN |
| 4TN8 | Rgnl Hospital Of Jackson Heliport | Jackson TN |
| 4TN9 | Southfork Airport | Jackson TN |
| 4TS0 | First City Financial Center Heliport | Houston TX |
| 4TS1 | Pin Oak Stables Heliport | Houston TX |
| 4TS2 | Wilshire Place Heliport | Houston TX |
| 4TS3 | Palestine Regional Medical Center Heliport | Palestine TX |
| 4TS4 | Palm Petroleum Corporation Heliport | Houston TX |
| 4TS5 | Goebel Field Airport | Mountain Home TX |
| 4TS6 | State Police Heliport | Jersey Village TX |
| 4TS7 | Allison Ranch Airport | Fort Stockton TX |
| 4TS8 | Glasscock Field Airport | D'hanis TX |
| 4TS9 | Ossiport Heliport | Austin TX |
| 4TX0 | Slack Airport | Mont Belvieu TX |
| 4TX1 | Abilene Rgnl Medical Center Heliport | Abilene TX |
| 4TX2 | Stage Coach Hills Airport | Keller TX |
| 4TX3 | Forest Hill Airport | Petty TX |
| 4TX4 | Birk Airport | Kennedale TX |
| 4TX5 | Hancock Airport | Kerens TX |
| 4TX6 | Kilgore Airport | Kilgore TX |
| 4TX7 | Oliver Airport | Knox City TX |
| 4TX8 | Addington Field Airport | Krum TX |
| 4U4 | Hebbelman Airport | Chinook MT |
| 4U6 | Circle Town County Airport | Circle MT |
| 4U7 | West Fork Lodge Airport | Conner MT |
| 4U9 | Dell Flight Strip Airport | Dell MT |
| 4V0 | Rangely Airport | Rangely CO |
| 4V1 | Spanish Peaks Airfield Airport | Walsenburg CO |
| 4V4 | Northwood Muni-vince Field Airport | Northwood ND |
| 4V6 | Hay Springs Muni Airport | Hay Springs NE |
| 4V8 | Deerfield Valley Rgnl Airport | West Dover VT |
| 4V9 | Antelope County Airport | Neligh NE |
| 4VA1 | Davis Field Airport | Martinsville VA |
| 4VA2 | Potomac Hospital Helistop Heliport | Woodbridge VA |
| 4VA3 | Flying W Airport | Richmond VA |
| 4VA4 | Hepner Airport | Woodstock VA |
| 4VA5 | Starr Airport | Arrington VA |
| 4VA6 | Taylor Airport | Atlantic VA |
| 4VA7 | United Coal Heliport | Grundy VA |
| 4VA8 | Christian's Airport | Richmond VA |
| 4VA9 | Pleasantdale Field Airport | Rixeyville VA |
| 4VG2 | Cool Water Airport | Ashland VA |
| 4W0 | Bandera State Airport | Bandera WA |
| 4W4 | Whitfield Farms Airport | Hurdle Mills NC |
| 4W7 | Hurdle Field Airport | Mebane NC |
| 4W8 | Elma Muni Airport | Elma WA |
| 4W9 | Pink Hill Airport | Pink Hill NC |
| 4WA0 | B & G Farms Airport | Royal City WA |
| 4WA1 | Brown's Cape Horn Airport | Skamania WA |
| 4WA2 | Cricket Field Airport | Little Rock WA |
| 4WA3 | St John's Medical Center Heliport | Longview WA |
| 4WA4 | Windsock Airport | Lopez WA |
| 4WA6 | Hille-kimp Airstrip Airport | Kahlotus WA |
| 4WA7 | Mark Reed Hospital Heliport | Mc Cleary WA |
| 4WA8 | Riverside Airport | Deming WA |
| 4WA9 | Port Orchard Airport | Port Orchard WA |
| 4WI0 | Wissota Airport | Chippewa Falls WI |
| 4WI1 | Bancroft East Airport | Rio WI |
| 4WI2 | Island View Airport | Crandon WI |
| 4WI3 | Neveln Field Airport | Crivitz WI |
| 4WI4 | Turner Airport | Tomahawk WI |
| 4WI5 | Carlson Airport | Eau Claire WI |
| 4WI6 | Feldmann Field Ultralight | Sheboygan Falls WI |
| 4WI8 | Carhart Farms Airport | Galesville WI |
| 4WN2 | Swensen Airport | Vesper WI |
| 4WN3 | Lakewood Airpark Airport | Lakewood WI |
| 4WN4 | River Ridge Aero Estates Airport | Holcombe WI |
| 4WN5 | Romeo Airstrip Airport | Balsam Lake WI |
| 4WN6 | Bay Area Medical Center Heliport | Marinette WI |
| 4WN7 | County Rescue Services Heliport | Green Bay WI |
| 4WN8 | Lynn Louise Heliport | Dousman WI |
| 4WN9 | Digger Dougs Airport | Salem WI |
| 4WV4 | Heaven's Landing Airport | Medley WV |
| 4X4 | Wessington Springs Airport | Wessington Springs SD |
| 4XA2 | Card Airfield Airport | Kenedy TX |
| 4XA3 | Owen Field Airport | Clyde TX |
| 4XA4 | Apache Pass Airport | Rockdale TX |
| 4XA5 | 4-shipp Airport | Burkburnett TX |
| 4XA6 | Medical Center Of Southeast Texas Heliport | Port Arthur TX |
| 4XA7 | Baylor Health Center At Irving Coppell Heliport | Irving TX |
| 4XA8 | Winkler County Memorial Hospital Heliport | Kermit TX |
| 4XS0 | Pfeffer & Son Farms Airport | Waller TX |
| 4XS1 | Coyote Field Airport | Corsicana TX |
| 4XS2 | Teate Field Airport | Paradise TX |
| 4XS3 | Columbia Lakes Heliport | West Columbia TX |
| 4XS4 | Baylor Medical Center At Carrollton Heliport | Carrollton TX |
| 4XS5 | Scrappin Valley Airport | Wiergate TX |
| 4XS6 | H Young Ranch Airport | Willow City TX |
| 4XS8 | Winn Ranch Airport | Wimberley TX |
| 4XS9 | Garnett Ranch Airport | Wimberley TX |
| 4Y1 | Raether Airport | Howell MI |
| 4Y4 | Lakes Of The North Airport | Gaylord MI |
| 4Y8 | Para Field Airport | Yale MI |
| 4Y9 | Eagles Landing Airport | Harrietta MI |
| 4Z5 | Horsfeld Airport | Horsfeld AK |
| 4Z7 | Hyder Seaplane Base | Hyder AK |
| 4Z9 | Jakolof Bay Airport | Jakolof Bay AK |
