flight Aircraft
N21723
BOEING 737-700
Operated by UNITED AIRLINES INC
- Tail number
- N21723
- Type
- B737
- Mode-S
- A1D63D
Not currently tracked · last seen 3h ago
- Flights observed
- 227 showing last 50
- Avg flight time
- 1h 41m
- Typical route
- MSY → ORD
- Last seen
- 3h ago
Last known area
Recent flights last 50
| Date | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|
| 2026-05-30 | SNA → EWR | May 30, 03:10 UTC | May 30, 03:40 UTC | 30m |
| 2026-05-30 | IAH → EWR | May 30, 01:20 UTC | May 30, 01:50 UTC | 30m |
| 2026-05-29 | LGA → DEN | May 29, 19:15 UTC | May 29, 19:35 UTC | 20m |
| 2026-05-29 | ORD → PUJ | May 29, 14:00 UTC | May 29, 17:30 UTC | 3h 30m |
| 2026-05-29 | MSY → ORD | May 29, 02:00 UTC | May 29, 05:40 UTC | 3h 40m |
| 2026-05-29 | MSY → ORD | May 29, 01:50 UTC | May 29, 05:43 UTC | 3h 53m |
| 2026-05-28 | EWR → RSW | May 28, 22:15 UTC | May 28, 23:35 UTC | 1h 20m |
| 2026-05-28 | MSY → EWR | May 28, 19:50 UTC | May 28, 20:55 UTC | 1h 5m |
| 2026-05-28 | BOS → EWR | May 28, 15:40 UTC | May 28, 17:30 UTC | 1h 50m |
| 2026-05-28 | SFO → ORD | May 28, 12:10 UTC | May 28, 13:55 UTC | 1h 45m |
| 2026-05-27 | DCA → ORD | May 27, 22:45 UTC | May 28, 00:35 UTC | 1h 50m |
| 2026-05-27 | DCA → ORD | May 27, 22:29 UTC | May 28, 00:12 UTC | 1h 43m |
| 2026-05-27 | LAX → IAH | May 27, 19:50 UTC | May 27, 21:20 UTC | 1h 30m |
| 2026-05-27 | DCA → ORD | May 27, 15:40 UTC | May 27, 17:00 UTC | 1h 20m |
| 2026-05-27 | SLC → DEN | May 27, 13:30 UTC | May 27, 14:35 UTC | 1h 5m |
| 2026-05-27 | IAH → SFO | May 27, 11:35 UTC | May 27, 12:10 UTC | 35m |
| 2026-05-27 | IAH → EWR | May 27, 03:29 UTC | May 27, 03:54 UTC | 25m |
| 2026-05-27 | ATL → ORD | May 27, 00:10 UTC | May 27, 01:14 UTC | 1h 5m |
| 2026-05-26 | ATL → ORD | May 26, 23:24 UTC | May 27, 01:20 UTC | 1h 56m |
| 2026-05-26 | DEN → TPA | May 26, 19:50 UTC | May 26, 21:20 UTC | 1h 30m |
| 2026-05-26 | EWR → SRQ | May 26, 15:35 UTC | May 26, 17:25 UTC | 1h 50m |
| 2026-05-26 | LAX → ORD | May 26, 12:14 UTC | May 26, 14:00 UTC | 1h 45m |
| 2026-05-25 | SFO → ICN | May 25, 23:54 UTC | May 26, 00:54 UTC | 1h 0m |
| 2026-05-25 | ORD → PIT | May 25, 21:19 UTC | May 25, 22:15 UTC | 55m |
| 2026-05-25 | IAH → SFO | May 25, 17:25 UTC | May 25, 18:55 UTC | 1h 30m |
| 2026-05-25 | YYZ → ORD | May 25, 14:45 UTC | May 25, 16:15 UTC | 1h 30m |
| 2026-05-25 | DEN → FAT | May 25, 11:15 UTC | May 25, 12:00 UTC | 45m |
| 2026-05-25 | SNA → EWR | May 25, 03:00 UTC | May 25, 03:30 UTC | 30m |
| 2026-05-24 | EWR → ATL | May 24, 23:00 UTC | May 24, 23:46 UTC | 46m |
| 2026-05-24 | EWR → ATL | May 24, 22:57 UTC | May 25, 01:08 UTC | 2h 11m |
| 2026-05-24 | IAD → PHX | May 24, 18:55 UTC | May 24, 21:50 UTC | 2h 55m |
| 2026-05-24 | BWI → LAX | May 24, 15:25 UTC | May 24, 17:10 UTC | 1h 45m |
| 2026-05-24 | LAX → EWR | May 24, 11:30 UTC | May 24, 12:40 UTC | 1h 10m |
| 2026-05-24 | DEN → EWR | May 24, 00:25 UTC | May 24, 02:05 UTC | 1h 40m |
| 2026-05-23 | ORD → LGA | May 23, 20:30 UTC | May 23, 22:30 UTC | 2h 0m |
| 2026-05-23 | ORD → EWR | May 23, 14:10 UTC | May 23, 19:05 UTC | 4h 56m |
| 2026-05-23 | ATL → EWR | May 23, 01:40 UTC | May 23, 05:30 UTC | 3h 49m |
| 2026-05-22 | EWR → RSW | May 22, 22:45 UTC | May 23, 00:05 UTC | 1h 20m |
| 2026-05-22 | MSY → EWR | May 22, 19:45 UTC | May 22, 20:55 UTC | 1h 10m |
| 2026-05-22 | ORD → PUJ | May 22, 14:05 UTC | May 22, 17:30 UTC | 3h 25m |
| 2026-05-22 | MSY → ORD | May 22, 02:20 UTC | May 22, 06:10 UTC | 3h 50m |
| 2026-05-21 | LGA → DEN | May 21, 22:40 UTC | May 22, 00:20 UTC | 1h 40m |
| 2026-05-21 | YYZ → CVG | May 21, 20:05 UTC | May 21, 21:15 UTC | 1h 10m |
| 2026-05-21 | YYZ → CVG | May 21, 19:34 UTC | May 21, 21:17 UTC | 1h 43m |
| 2026-05-21 | DEN → SFO | May 21, 16:15 UTC | May 21, 18:10 UTC | 1h 55m |
| 2026-05-21 | ORD → EWR | May 21, 13:30 UTC | May 21, 14:49 UTC | 1h 19m |
| 2026-05-21 | ORD → EWR | May 21, 13:25 UTC | May 21, 14:45 UTC | 1h 20m |
| 2026-05-21 | IAH → ANC | May 21, 00:45 UTC | May 21, 01:40 UTC | 55m |
| 2026-05-21 | IAH → ANC | May 21, 00:37 UTC | May 21, 01:25 UTC | 48m |
| 2026-05-20 | LAS → ORD | May 20, 22:30 UTC | May 20, 23:35 UTC | 1h 5m |
Specifications
| Registration | N21723 |
| Aircraft type | BOEING 737-700 (B737) |
| Operator | UNITED AIRLINES INC |
| Mode-S code | A1D63D · 50353075 (octal) |
Looking for transponder-level data? View the Mode-S A1D63D page for country allocation, callsign history, and ADS-B signal details.
N21723 frequently asked
What type of aircraft is N21723?
N21723 is a BOEING 737-700 (ICAO type code B737).
Who operates N21723?
N21723 is operated by UNITED AIRLINES INC.
What is the Mode-S transponder code for N21723?
N21723 broadcasts on Mode-S (ICAO 24-bit) address A1D63D (octal 50353075). View the transponder page.
What route does N21723 typically fly?
N21723 most frequently flies between MSY and ORD based on observed flights.
Where is N21723 right now?
N21723 is not currently being tracked; last seen 3h ago.