flight Aircraft
N21723
BOEING 737-700
Operated by UNITED AIRLINES INC
- Tail number
- N21723
- Type
- B737
- Mode-S
- A1D63D
Not currently tracked · last seen Jul 24, 22:30 UTC
- Flights observed
- 446 showing last 50
- Avg flight time
- 2h 10m
- Typical route
- IAH → QRO
- Last seen
- Jul 24, 22:30 UTC
Last known area
Recent flights last 50
| Date | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|
| 2026-07-24 | EWR → PHX | Jul 24, 20:00 UTC | Jul 24, 22:30 UTC | 2h 30m |
| 2026-07-24 | MSY → IAH | Jul 24, 16:10 UTC | Jul 24, 18:30 UTC | 2h 20m |
| 2026-07-24 | MSY → IAH | Jul 24, 16:09 UTC | Jul 24, 18:33 UTC | 2h 24m |
| 2026-07-24 | EWR → BUF | Jul 24, 13:50 UTC | Jul 24, 14:45 UTC | 55m |
| 2026-07-24 | EWR → BOS | Jul 24, 11:15 UTC | Jul 24, 11:50 UTC | 35m |
| 2026-07-24 | DEN → EWR | Jul 24, 01:05 UTC | Jul 24, 02:45 UTC | 1h 40m |
| 2026-07-23 | EWR → IAH | Jul 23, 21:35 UTC | Jul 23, 23:10 UTC | 1h 35m |
| 2026-07-23 | SFO → LAS | Jul 23, 15:05 UTC | Jul 23, 19:15 UTC | 4h 10m |
| 2026-07-23 | HNL → SFO | Jul 23, 11:40 UTC | Jul 23, 13:10 UTC | 1h 30m |
| 2026-07-22 | DEN → MCO | Jul 22, 23:15 UTC | Jul 23, 00:50 UTC | 1h 35m |
| 2026-07-22 | IAH → CLE | Jul 22, 18:25 UTC | Jul 22, 21:10 UTC | 2h 45m |
| 2026-07-22 | IAH → CLE | Jul 22, 18:15 UTC | Jul 22, 21:07 UTC | 2h 52m |
| 2026-07-22 | MSY → DEN | Jul 22, 14:15 UTC | Jul 22, 17:10 UTC | 2h 55m |
| 2026-07-22 | AUS → IAD | Jul 22, 03:10 UTC | Jul 22, 05:25 UTC | 2h 15m |
| 2026-07-22 | AUS → IAD | Jul 22, 02:40 UTC | Jul 22, 05:53 UTC | 3h 13m |
| 2026-07-21 | IAD → AUS | Jul 21, 19:20 UTC | Jul 21, 22:20 UTC | 3h 0m |
| 2026-07-21 | IAD → BOS | Jul 21, 12:15 UTC | Jul 21, 15:10 UTC | 2h 55m |
| 2026-07-21 | - | Jul 21, 00:05 UTC | Jul 21, 00:40 UTC | 35m |
| 2026-07-21 | IAH → SAT | Jul 21, 00:11 UTC | Jul 21, 00:36 UTC | 25m |
| 2026-07-20 | QRO → IAH | Jul 20, 21:10 UTC | Jul 20, 22:25 UTC | 1h 15m |
| 2026-07-20 | - | Jul 20, 17:40 UTC | Jul 20, 21:15 UTC | 3h 35m |
| 2026-07-20 | IAH → QRO | Jul 20, 17:45 UTC | Jul 20, 19:14 UTC | 1h 29m |
| 2026-07-20 | SNA → IAH | Jul 20, 12:40 UTC | Jul 20, 15:45 UTC | 3h 5m |
| 2026-07-19 | MIA → EWR | Jul 19, 23:35 UTC | Jul 20, 02:50 UTC | 3h 15m |
| 2026-07-19 | IAH → SAN | Jul 19, 19:10 UTC | Jul 19, 21:55 UTC | 2h 45m |
| 2026-07-19 | ORD → CLE | Jul 19, 15:05 UTC | Jul 19, 17:40 UTC | 2h 35m |
| 2026-07-19 | - | Jul 19, 10:25 UTC | Jul 19, 13:00 UTC | 2h 35m |
| 2026-07-19 | - | Jul 19, 01:30 UTC | Jul 19, 03:15 UTC | 1h 45m |
| 2026-07-19 | IAH → RIC | Jul 19, 01:26 UTC | Jul 19, 03:56 UTC | 2h 30m |
| 2026-07-18 | SFO → BOS | Jul 18, 20:10 UTC | Jul 18, 23:10 UTC | 3h 0m |
| 2026-07-18 | SFO → BOS | Jul 18, 20:10 UTC | Jul 18, 23:07 UTC | 2h 57m |
| 2026-07-18 | - | Jul 18, 15:25 UTC | Jul 18, 18:20 UTC | 2h 55m |
| 2026-07-18 | - | Jul 18, 13:15 UTC | Jul 18, 13:50 UTC | 35m |
| 2026-07-18 | SAT → IAH | Jul 18, 13:16 UTC | Jul 18, 13:53 UTC | 37m |
| 2026-07-18 | - | Jul 18, 00:10 UTC | Jul 18, 00:50 UTC | 40m |
| 2026-07-17 | - | Jul 17, 19:25 UTC | Jul 17, 22:10 UTC | 2h 45m |
| 2026-07-17 | - | Jul 17, 15:20 UTC | Jul 17, 17:55 UTC | 2h 35m |
| 2026-07-17 | IAH → DCA | Jul 17, 15:07 UTC | Jul 17, 17:55 UTC | 2h 48m |
| 2026-07-17 | - | Jul 17, 01:35 UTC | Jul 17, 04:25 UTC | 2h 50m |
| 2026-07-16 | - | Jul 16, 14:55 UTC | Jul 16, 17:54 UTC | 3h 0m |
| 2026-07-16 | - | Jul 16, 11:25 UTC | Jul 16, 13:20 UTC | 1h 55m |
| 2026-07-15 | - | Jul 15, 22:25 UTC | Jul 16, 00:15 UTC | 1h 50m |
| 2026-07-15 | - | Jul 15, 15:15 UTC | Jul 15, 20:30 UTC | 5h 15m |
| 2026-07-15 | - | Jul 15, 11:35 UTC | Jul 15, 13:05 UTC | 1h 30m |
| 2026-07-15 | QRO → IAH | Jul 15, 11:17 UTC | Jul 15, 13:06 UTC | 1h 49m |
| 2026-07-15 | - | Jul 15, 00:15 UTC | Jul 15, 01:20 UTC | 1h 5m |
| 2026-07-15 | IAH → QRO | Jul 15, 00:20 UTC | Jul 15, 01:43 UTC | 1h 23m |
| 2026-07-14 | - | Jul 14, 21:00 UTC | Jul 14, 22:20 UTC | 1h 20m |
| 2026-07-14 | - | Jul 14, 17:45 UTC | Jul 14, 18:50 UTC | 1h 5m |
| 2026-07-14 | IAH → QRO | Jul 14, 17:45 UTC | Jul 14, 19:15 UTC | 1h 30m |
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 IAH and QRO based on observed flights.
Where is N21723 right now?
N21723 is not currently being tracked; last seen Jul 24, 22:30 UTC.