Aircraft N21723 Data

N21723
1999 Boeing 737-724, c/n 28790
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Latest photos of N21723
Aircraft N21723, B737 United Airlines Boeing 737-724 N21723 departing 28R, at KORD, photo by MarkKalfas
MarkKalfas
@ KORD
Aircraft N21723, B737 United Airlines Boeing Boeing 737-724 N21723 UAL1113 ORD-ALB, at KORD, photo by Mark Kalfas
Mark Kalfas
@ KORD
Aircraft N21723, B737 United Airlines Boeing Boeing 737-724 N21723 UAL1113 ORD-ALB, at KORD, photo by Mark Kalfas
Mark Kalfas
@ KORD
Aircraft N21723, B737 United Airlines Boeing Boeing 737-724 N21723 UAL1113 ORD-ALB, at KORD, photo by Mark Kalfas
Mark Kalfas
@ KORD
Recent Routes
IN FLIGHT UAL1888 UA1888 United Airlines
Time Callsign FL Speed Heading Route
2026-09-30 19:36 UTC UAL1888 / UA1888 FL148 344 kt 303° DCA → ORD DCA → ORD Ronald Reagan Washington Ntl Airport
→
Chicago O'hare International Airport
2026-09-30 16:50 UTC UAL1904 / UA1904 — 7 kt 357° —
2026-09-30 13:48 UTC UAL441 / UA441 — 8 kt 307° DCA → ORD DCA → ORD Ronald Reagan Washington Ntl Airport
→
Chicago O'hare International Airport
2026-09-30 02:36 UTC UAL2160 / UA2160 FL-2 131 kt 356° DEN → DFW DEN → DFW Denver International Airport
→
Dallas-fort Worth International Airport
2026-09-29 22:04 UTC UAL2458 / UA2458 — 9 kt 191° ORD → LGA ORD → LGA Chicago O'hare International Airport
→
Laguardia Airport
2026-09-29 17:58 UTC UAL2176 / UA2176 FL360 452 kt 281° ORD → THP ORD → THP Chicago O'hare International Airport
→
Hot Springs County Airport
2026-09-29 12:18 UTC UAL2684 / UA2684 — 5 kt 188° ORD → ATL ORD → ATL Chicago O'hare International Airport
→
Hartsfield/jackson Atlanta International Airport
2026-09-29 01:46 UTC UAL1719 / UA1719 FL9 131 kt 297° —
2026-09-28 22:28 UTC UAL1851 / UA1851 — 16 kt 90° ORD → LAS ORD → LAS Chicago O'hare International Airport
→
Harry Reid International Airport
2026-09-28 19:44 UTC UAL1595 / UA1595 FL8 149 kt 29° SFO → LAS SFO → LAS San Francisco International Airport
→
Harry Reid International Airport
2026-09-28 17:28 UTC UAL2207 / UA2207 — 1 kt 231° PHL → ORD PHL → ORD Philadelphia International Airport
→
Chicago O'hare International Airport
2026-09-28 14:14 UTC UAL2856 / UA2856 — 10 kt 222° ORD → PHL ORD → PHL Chicago O'hare International Airport
→
Philadelphia International Airport
2026-09-28 05:48 UTC UAL1517 / UA1517 — 12 kt 295° DFW → ORD DFW → ORD Dallas-fort Worth International Airport
→
Chicago O'hare International Airport
2026-09-28 02:42 UTC UAL793 / UA793 — 8 kt 270° ORD → DFW ORD → DFW Chicago O'hare International Airport
→
Dallas-fort Worth International Airport
2026-09-27 22:32 UTC UAL2138 / UA2138 — 10 kt 11° ORD → SAN ORD → SAN Chicago O'hare International Airport
→
San Diego International Airport
2026-09-27 18:26 UTC UAL1297 / UA1297 FL7 137 kt 82° DEN → STL DEN → STL Denver International Airport
→
St Louis Lambert International Airport
2026-09-27 16:46 UTC UAL2792 / UA2792 — 14 kt 262° STL → ORD STL → ORD St Louis Lambert International Airport
→
Chicago O'hare International Airport
2026-09-27 02:34 UTC UAL1625 / UA1625 — 2 kt 124° AUS → ORD AUS → ORD Austin-bergstrom International Airport
→
Chicago O'hare International Airport
2026-09-27 00:24 UTC UAL2304 / UA2304 — 3 kt 98° EWR → ATL EWR → ATL Newark Liberty International Airport
→
Hartsfield/jackson Atlanta International Airport
2026-09-26 19:58 UTC UAL752 / UA752 — 6 kt 264° ORD → DCA ORD → DCA Chicago O'hare International Airport
→
Ronald Reagan Washington Ntl Airport
2026-09-26 16:10 UTC UAL1215 / UA1215 — 18 kt 90° —
2026-09-25 21:34 UTC UAL1634 / UA1634 FL4 134 kt 358° DFW → ORD DFW → ORD Dallas-fort Worth International Airport
→
Chicago O'hare International Airport
2026-09-25 14:24 UTC UAL539 / UA539 — 8 kt 270° ORD → DFW ORD → DFW Chicago O'hare International Airport
→
Dallas-fort Worth International Airport
2026-09-25 01:24 UTC UAL1009 / UA1009 FL7 129 kt 90° SBA → ORD SBA → ORD Santa Barbara Municipal Airport
→
Chicago O'hare International Airport
2026-09-24 20:32 UTC UAL1008 / UA1008 — 10 kt 132° ORD → SBA ORD → SBA Chicago O'hare International Airport
→
Santa Barbara Municipal Airport
2026-09-24 14:18 UTC UAL1955 / UA1955 — 12 kt 0° ATL → ORD ATL → ORD Hartsfield/jackson Atlanta International Airport
→
Chicago O'hare International Airport
2026-09-24 02:36 UTC UAL1020 / UA1020 — 0 kt 270° EWR → ATL EWR → ATL Newark Liberty International Airport
→
Hartsfield/jackson Atlanta International Airport
2026-09-23 22:48 UTC UAL2645 / UA2645 — 2 kt 183° —
2026-09-23 20:04 UTC UAL1673 / UA1673 FL5 131 kt 51° ORD → DFW ORD → DFW Chicago O'hare International Airport
→
Dallas-fort Worth International Airport
2026-09-23 17:18 UTC UAL2659 / UA2659 — 3 kt 186° ORD → EWR ORD → EWR Chicago O'hare International Airport
→
Newark Liberty International Airport
2026-09-23 14:38 UTC UAL1365 / UA1365 — 18 kt 45° —
2026-09-22 22:02 UTC UAL2693 / UA2693 — 10 kt 276° EWR → SEA EWR → SEA Newark Liberty International Airport
→
Seattle-tacoma International Airport
2026-09-22 17:56 UTC UAL1760 / UA1760 FL5 143 kt 327° AUS → EWR AUS → EWR Austin-bergstrom International Airport
→
Newark Liberty International Airport
2026-09-22 14:56 UTC UAL1307 / UA1307 — 1 kt 186° BOS → EWR BOS → EWR General Edward Lawrence Logan International Airport
→
Newark Liberty International Airport
2026-09-22 11:54 UTC UAL593 / UA593 — 13 kt 200° EWR → BOS EWR → BOS Newark Liberty International Airport
→
General Edward Lawrence Logan International Airport
2026-09-21 13:20 UTC UAL2053 / UA2053 — 2 kt 349° EWR → ORD EWR → ORD Newark Liberty International Airport
→
Chicago O'hare International Airport
2026-09-21 01:26 UTC UAL1559 / UA1559 — 0 kt 186° LGA → ORD LGA → ORD Laguardia Airport
→
Chicago O'hare International Airport
2026-09-20 19:18 UTC UAL8169 / UA8169 FL1 141 kt 208° —
2026-09-20 13:20 UTC UAL1683 / UA1683 FL10 135 kt 90° SJC → ORD SJC → ORD Norman Y Mineta San Jose International Airport
→
Chicago O'hare International Airport
2026-09-20 07:20 UTC UAL349 / UA349 FL8 128 kt 29° —
2026-09-20 01:48 UTC UAL654 / UA654 FL7 132 kt 91° DCA → ORD DCA → ORD Ronald Reagan Washington Ntl Airport
→
Chicago O'hare International Airport
2026-09-19 18:52 UTC UAL567 / UA567 — 18 kt 90° DFW → DEN DFW → DEN Dallas-fort Worth International Airport
→
Denver International Airport
2026-09-19 04:06 UTC UAL8231 / UA8231 FL6 136 kt 50° —
2026-09-19 02:18 UTC UAL1460 / UA1460 — 12 kt 93° BNA → IAD BNA → IAD Nashville International Airport
→
Washington Dulles International Airport
2026-09-18 23:36 UTC UAL2165 / UA2165 — 15 kt 17° —
2026-09-18 19:18 UTC UAL2026 / UA2026 FL3 134 kt 90° —
2026-09-18 16:44 UTC UAL2256 / UA2256 — 15 kt 301° —
2026-09-18 13:28 UTC UAL1345 / UA1345 FL3 130 kt 91° —
2026-09-18 04:46 UTC UAL313 / UA313 — 3 kt 225° —
2026-09-17 23:14 UTC UAL3937 / UA3937 FL3 123 kt 90° —
2026-09-16 15:40 UTC UAL2074 / UA2074 FL4 140 kt 180° —
2026-09-16 02:12 UTC UAL1678 / UA1678 FL3 144 kt 90° SFO → DCA SFO → DCA San Francisco International Airport
→
Ronald Reagan Washington Ntl Airport
2026-09-15 22:04 UTC UAL625 / UA625 — 4 kt 354° —
2026-09-15 17:44 UTC UAL2190 / UA2190 FL4 146 kt 270° —
2026-09-15 14:04 UTC UAL482 / UA482 — 3 kt 174° ORD → DCA ORD → DCA Chicago O'hare International Airport
→
Ronald Reagan Washington Ntl Airport
2026-09-14 01:06 UTC UAL785 / UA785 — 12 kt 90° ATL → ORD ATL → ORD Hartsfield/jackson Atlanta International Airport
→
Chicago O'hare International Airport
2026-09-13 21:38 UTC UAL1848 / UA1848 — 1 kt 203° EWR → ATL EWR → ATL Newark Liberty International Airport
→
Hartsfield/jackson Atlanta International Airport
2026-09-13 17:56 UTC UAL1498 / UA1498 — 3 kt 321° IAD → EWR IAD → EWR Washington Dulles International Airport
→
Newark Liberty International Airport
2026-09-13 15:48 UTC UAL1858 / UA1858 — 3 kt 200° —
2026-09-13 12:56 UTC UAL2355 / UA2355 FL8 156 kt 148° —
2026-09-13 00:42 UTC UAL1324 / UA1324 — 6 kt 321° —
2026-09-12 14:20 UTC UAL577 / UA577 — 0 kt 214° EWR → BOS EWR → BOS Newark Liberty International Airport
→
General Edward Lawrence Logan International Airport
2026-09-12 05:00 UTC UAL1637 / UA1637 — 3 kt 113° EWR → STL EWR → STL Newark Liberty International Airport
→
St Louis Lambert International Airport
2026-09-11 18:34 UTC UAL1304 / UA1304 FL362 124 kt 208° YYZ → ORD YYZ → ORD Lester B Pearson International Airport
→
Chicago O'hare International Airport
2026-09-10 18:22 UTC UAL1992 / UA1992 — 9 kt 281° —
2026-09-10 15:56 UTC UAL544 / UA544 FL8 137 kt 230° —
2026-09-08 18:16 UTC UAL1645 / UA1645 FL4 154 kt 270° —
2026-09-08 14:36 UTC UAL1833 / UA1833 FL6 138 kt 230° BOS → EWR BOS → EWR General Edward Lawrence Logan International Airport
→
Newark Liberty International Airport
2026-09-08 01:30 UTC UAL1409 / UA1409 — 0 kt 186° EWR → AUS EWR → AUS Newark Liberty International Airport
→
Austin-bergstrom International Airport
2026-09-07 22:10 UTC UAL2315 / UA2315 FL299 522 kt 205° PHL → ORD PHL → ORD Philadelphia International Airport
→
Chicago O'hare International Airport
2026-09-07 19:06 UTC UAL3891 / UA3891 — 1 kt 186° —
2026-08-30 05:36 UTC UAL3880 / UA3880 FL1 134 kt 267° —
2026-08-29 19:02 UTC UAL661 / UA661 — 5 kt 276° EWR → ORD EWR → ORD Newark Liberty International Airport
→
Chicago O'hare International Airport
2026-08-29 04:38 UTC UAL326 / UA326 FL3 134 kt 208° —
2026-08-28 23:44 UTC UAL1785 / UA1785 FL3 136 kt 270° —
2026-08-28 16:06 UTC UAL1554 / UA1554 FL7 146 kt 270° ORD → PDX ORD → PDX Chicago O'hare International Airport
→
Portland International Airport
2026-08-28 03:00 UTC UAL2770 / UA2770 — 1 kt 180° ORD → ATL ORD → ATL Chicago O'hare International Airport
→
Hartsfield/jackson Atlanta International Airport
2026-08-28 00:02 UTC UAL1738 / UA1738 — 10 kt 90° —
2026-08-27 21:00 UTC UAL1651 / UA1651 FL25 140 kt 13° —
2026-08-27 16:16 UTC UAL2032 / UA2032 — 24 kt 90° —
2026-08-27 00:28 UTC UAL378 / UA378 FL351 419 kt 278° MCO → ORD MCO → ORD Orlando International Airport
→
Chicago O'hare International Airport
2026-08-26 16:56 UTC UAL728 / UA728 — 5 kt 248° —
2026-08-26 14:22 UTC UAL1332 / UA1332 — 3 kt 323° —
2026-08-26 00:50 UTC UAL1477 / UA1477 FL10 139 kt 132° —
2026-08-25 22:28 UTC UAL2044 / UA2044 FL5 148 kt 270° —
2026-08-25 18:34 UTC UAL1383 / UA1383 FL1 129 kt 208° —
2026-08-25 12:46 UTC UAL2205 / UA2205 FL5 129 kt 270° —
2026-08-25 03:10 UTC UAL2086 / UA2086 FL8 137 kt 274° —
2026-08-24 23:40 UTC UAL1444 / UA1444 FL5 152 kt 270° —
2026-08-24 21:28 UTC UAL2738 / UA2738 — 13 kt 107° —
2026-08-24 13:34 UTC UAL1077 / UA1077 — 7 kt 338° ORD → DCA ORD → DCA Chicago O'hare International Airport
→
Ronald Reagan Washington Ntl Airport
2026-08-24 02:38 UTC UAL324 / UA324 — 16 kt 290° ATL → ORD ATL → ORD Hartsfield/jackson Atlanta International Airport
→
Chicago O'hare International Airport
2026-08-23 19:40 UTC A6Z F — 4 kt 267° —
2026-08-23 19:34 UTC UAL1548 / UA1548 — 10 kt 295° STL → DEN STL → DEN St Louis Lambert International Airport
→
Denver International Airport
2026-08-22 20:20 UTC UAL2427 / UA2427 FL9 133 kt 271° ORD → EUG ORD → EUG Chicago O'hare International Airport
→
Mahlon Sweet Fld Airport
2026-08-22 18:36 UTC UAL2751 / UA2751 FL10 143 kt 261° YUL → ORD YUL → ORD Montreal / Pierre Elliott Trudeau International Airport
→
Chicago O'hare International Airport
2026-08-21 17:16 UTC UAL728T / UA728T — 19 kt 174° —
2026-08-21 14:26 UTC UAL2465 / UA2465 — 1 kt 180° BNA → ORD BNA → ORD Nashville International Airport
→
Chicago O'hare International Airport
2026-08-21 02:44 UTC UAL335 / UA335 — 21 kt 17° ORD → BNA ORD → BNA Chicago O'hare International Airport
→
Nashville International Airport
2026-08-20 23:44 UTC UAL1842 / UA1842 — 15 kt 3° ORD → FSD ORD → FSD Chicago O'hare International Airport
→
Joe Foss Fld Airport
2026-08-20 18:58 UTC UAL1952 / UA1952 FL11 159 kt 147° —
2026-08-20 15:56 UTC UAL1181 / UA1181 — 0 kt 11° —
2026-08-20 13:30 UTC UAL2335 / UA2335 FL8 140 kt 50° —
2026-08-20 11:14 UTC UAL1252 / UA1252 — 6 kt 343° IAD → ORD IAD → ORD Washington Dulles International Airport
→
Chicago O'hare International Airport
2026-08-20 03:24 UTC UAL2131 / UA2131 — 25 kt 62° ATL → IAD ATL → IAD Hartsfield/jackson Atlanta International Airport
→
Washington Dulles International Airport
2026-08-20 01:02 UTC UAL632 / UA632 — 6 kt 270° ATL → IAD ATL → IAD Hartsfield/jackson Atlanta International Airport
→
Washington Dulles International Airport
2026-08-18 23:28 UTC UAL2081 / UA2081 — 20 kt 0° IAD → ATL IAD → ATL Washington Dulles International Airport
→
Hartsfield/jackson Atlanta International Airport
2026-08-18 20:12 UTC UAL780 / UA780 — 17 kt 90° IAD → PDX IAD → PDX Washington Dulles International Airport
→
Portland International Airport
2026-08-18 17:50 UTC UAL1709 / UA1709 FL8 134 kt 229° IAD → CLE IAD → CLE Washington Dulles International Airport
→
Cleveland-hopkins International Airport
2026-08-17 23:24 UTC UAL2454 / UA2454 — 18 kt 42° EWR → BNA EWR → BNA Newark Liberty International Airport
→
Nashville International Airport
2026-08-16 22:12 UTC UAL2682 / UA2682 FL4 153 kt 270° —
2026-08-16 20:06 UTC UAL1564 / UA1564 — 6 kt 270° IAD → DFW IAD → DFW Washington Dulles International Airport
→
Dallas-fort Worth International Airport
2026-08-16 01:20 UTC UAL2807 / UA2807 — 3 kt 186° ORD → ORF ORD → ORF Chicago O'hare International Airport
→
Norfolk International Airport
2026-08-15 13:30 UTC UAL775 / UA775 — 13 kt 23° ORD → STL ORD → STL Chicago O'hare International Airport
→
St Louis Lambert International Airport
2026-08-14 01:16 UTC UAL2652 / UA2652 FL8 148 kt 230° PHX → ORD PHX → ORD Phoenix Sky Harbor International Airport
→
Chicago O'hare International Airport
2026-08-12 01:18 UTC UAL1240 / UA1240 — 1 kt 11° DFW → IAD DFW → IAD Dallas-fort Worth International Airport
→
Washington Dulles International Airport
2026-08-11 21:12 UTC UAL1388 / UA1388 — 6 kt 270° —
2026-08-11 07:28 UTC UAL1316 / UA1316 — 8 kt 233° —
2026-08-10 22:04 UTC UAL2844 / UA2844 FL16 142 kt 132° MSY → ORD MSY → ORD Louis Armstrong New Orleans International Airport
→
Chicago O'hare International Airport
2026-08-10 18:20 UTC UAL374 / UA374 — 23 kt 90° —
2026-08-10 15:04 UTC UAL382 / UA382 — 10 kt 225° —
2026-08-10 12:14 UTC UAL3909 / UA3909 — 17 kt 197° —
2026-08-09 05:10 UTC UAL2063 / UA2063 — 21 kt 17° —
2026-08-09 03:04 UTC UAL1884 / UA1884 — 3 kt 222° BNA → ORD BNA → ORD Nashville International Airport
→
Chicago O'hare International Airport
2026-08-08 23:58 UTC UAL1928 / UA1928 — 17 kt 17° DEN → ORD DEN → ORD Denver International Airport
→
Chicago O'hare International Airport
2026-08-08 17:46 UTC UAL592 / UA592 — 13 kt 270° —
2026-08-08 13:58 UTC UAL2795 / UA2795 FL7 145 kt 147° —
2026-08-07 17:00 UTC UAL1502 / UA1502 FL8 135 kt 270° SLC → ORD SLC → ORD Salt Lake City International Airport
→
Chicago O'hare International Airport
2026-08-07 04:20 UTC UAL1710 / UA1710 — 17 kt 264° ORD → SLC ORD → SLC Chicago O'hare International Airport
→
Salt Lake City International Airport

Live location data from OpenSky Network

Airframe Info
Manufacturer Boeing
Model 737-724 Search all Boeing 737-724
Year built 1999
Construction Number (C/N) 28790
Aircraft Type Fixed wing multi engine
Number of Seats 149
Number of Engines 2
Engine Type Turbofan
Engine Manufacturer and Model CFM International CFM56-7B2
Aircraft
Registration Number N21723
Mode S (ICAO24) Code a1d63d
Certification Class Standard
Certification Issued 1999-04-23
Air Worthiness Test 1999-04-21
Last Action Taken 2025-11-03
Current Status Valid
Owner
Registration Type Corporation
Owner UNITED AIRLINES INC
Address 233 S Wacker Dr
Chicago, IL 606067147
United States
Region Great Lakes
N21723
1940 Heideman-bowlus B-3, c/n 3
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Airframe Info
Manufacturer Heideman-bowlus
Model B-3 Search all Heideman-bowlus B-3
Year built 1940
Construction Number (C/N) 3
Number of Seats 2
Aircraft
Registration Number N21723
Mode S (ICAO24) Code a1d63d
Certification Issued 1958-12-16
Current Status Deregistered
Registration Cancel Date 1967-06-29
Owner
Registration Type Individual
Address El Cajon, CA 92021
United States
Region Western-Pacific
N21723
Piper PA-31-350, c/n 318152028
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Airframe Info
Manufacturer Piper
Model PA-31-350 Search all Piper PA-31-350
Construction Number (C/N) 318152028
Number of Seats 8
Number of Engines 2
Aircraft
Registration Number N21723
Mode S (ICAO24) Code a1d63d
Certification Issued 1994-08-02
Last Action Taken 1994-08-03
Current Status Deregistered
Registration Cancel Date 1994-12-02
Owner
Registration Type Corporation
Owner SPECIAL AIR SERVICE CORP
Address Miami, FL 33176
United States