flight Aircraft
N21723
BOEING 737-700
Operated by UNITED AIRLINES INC
- Tail number
- N21723
- Type
- B737
- Mode-S
- A1D63D
Airborne now · flying as UAL343 at 33,175 ft
- Flights observed
- 16
- Avg flight time
- 1h 2m
- Typical route
- LAX → IAD
- Last seen
- 12h ago
Live position
Recent flights last 16
| Date | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|
| 2026-04-14 | - | Apr 14, 09:55 UTC | Apr 14, 11:05 UTC | 1h 10m |
| 2026-04-13 | IAD → MCO | Apr 13, 22:10 UTC | Apr 13, 23:00 UTC | 50m |
| 2026-04-13 | - | Apr 13, 19:50 UTC | Apr 13, 20:20 UTC | 30m |
| 2026-04-13 | - | Apr 13, 19:18 UTC | Apr 13, 20:24 UTC | 1h 6m |
| 2026-04-13 | - | Apr 13, 19:18 UTC | Apr 13, 20:17 UTC | 59m |
| 2026-04-13 | IAD → CLE | Apr 13, 17:03 UTC | Apr 13, 18:04 UTC | 1h 1m |
| 2026-04-13 | - | Apr 13, 14:50 UTC | Apr 13, 15:45 UTC | 55m |
| 2026-04-13 | IAD → CMH | Apr 13, 12:40 UTC | Apr 13, 13:30 UTC | 50m |
| 2026-04-13 | IAD → BOS | Apr 13, 09:59 UTC | Apr 13, 11:27 UTC | 1h 28m |
| 2026-04-13 | LAX → IAD | Apr 13, 04:20 UTC | Apr 13, 04:30 UTC | 10m |
| 2026-04-13 | LAX → IAD | Apr 13, 03:55 UTC | Apr 13, 04:30 UTC | 35m |
| 2026-04-13 | LAX → IAD | Apr 13, 03:15 UTC | Apr 13, 04:15 UTC | 1h 0m |
| 2026-04-13 | SFO → IAH | Apr 13, 00:20 UTC | Apr 13, 01:20 UTC | 1h 0m |
| 2026-04-12 | SFO → IAH | Apr 12, 23:55 UTC | Apr 13, 01:20 UTC | 1h 25m |
| 2026-04-12 | - | Apr 12, 17:58 UTC | Apr 12, 19:46 UTC | 1h 48m |
| 2026-04-12 | - | Apr 12, 18:16 UTC | Apr 12, 19:54 UTC | 1h 38m |
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 LAX and IAD based on observed flights.
Where is N21723 right now?
N21723 is currently airborne flying as UAL343. Live position is shown on the map above.