flight Aircraft
N39423
BOEING 737-900
Operated by UNITED AIRLINES INC
- Tail number
- N39423
- Type
- B739
- Mode-S
- A4945F
Airborne now · flying as UAL546 at 30,025 ft
- Flights observed
- 177 showing last 50
- Avg flight time
- 2h 15m
- Typical route
- SJC → DEN
- Last seen
- 1h ago
Live position
Recent flights last 50
| Date | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|
| 2026-05-29 | LAS → IAH | May 29, 20:20 UTC | May 29, 23:25 UTC | 3h 5m |
| 2026-05-29 | LAX → SFO | May 29, 15:20 UTC | May 29, 18:05 UTC | 2h 45m |
| 2026-05-28 | EWR → LAS | May 28, 19:55 UTC | May 29, 00:25 UTC | 4h 30m |
| 2026-05-28 | EWR → SJD | May 28, 15:55 UTC | May 28, 18:25 UTC | 2h 30m |
| 2026-05-28 | BOG → EWR | May 28, 12:25 UTC | May 28, 14:15 UTC | 1h 50m |
| 2026-05-28 | ONT → SFO | May 28, 00:55 UTC | May 28, 02:55 UTC | 2h 0m |
| 2026-05-27 | MFE → IAH | May 27, 19:00 UTC | May 27, 23:10 UTC | 4h 10m |
| 2026-05-27 | FLL → EWR | May 27, 14:10 UTC | May 27, 17:20 UTC | 3h 10m |
| 2026-05-27 | JAX → EWR | May 27, 00:55 UTC | May 27, 04:50 UTC | 3h 55m |
| 2026-05-27 | JAX → EWR | May 27, 00:55 UTC | May 27, 01:44 UTC | 50m |
| 2026-05-26 | SJC → DEN | May 26, 21:14 UTC | May 26, 23:05 UTC | 1h 50m |
| 2026-05-26 | SFO → EWR | May 26, 19:25 UTC | May 26, 19:30 UTC | 5m |
| 2026-05-26 | SFO → EWR | May 26, 18:10 UTC | May 26, 19:30 UTC | 1h 20m |
| 2026-05-26 | SFO → EWR | May 26, 18:05 UTC | May 26, 19:09 UTC | 1h 4m |
| 2026-05-26 | SFO → PDX | May 26, 14:20 UTC | May 26, 16:35 UTC | 2h 15m |
| 2026-05-26 | EWR → MSY | May 26, 11:09 UTC | May 26, 12:40 UTC | 1h 30m |
| 2026-05-26 | DEN → SFO | May 26, 03:50 UTC | May 26, 05:10 UTC | 1h 20m |
| 2026-05-26 | DEN → SFO | May 26, 03:45 UTC | May 26, 05:15 UTC | 1h 30m |
| 2026-05-25 | PHX → DEN | May 25, 22:38 UTC | May 26, 00:11 UTC | 1h 33m |
| 2026-05-24 | SFO → PDX | May 24, 23:05 UTC | May 25, 02:20 UTC | 3h 15m |
| 2026-05-24 | LGA → DEN | May 24, 18:35 UTC | May 24, 21:20 UTC | 2h 45m |
| 2026-05-24 | LAX → BOS | May 24, 14:30 UTC | May 24, 17:05 UTC | 2h 35m |
| 2026-05-23 | CUN → ORD | May 23, 21:10 UTC | May 24, 00:25 UTC | 3h 15m |
| 2026-05-23 | ORD → CUN | May 23, 16:04 UTC | May 23, 19:05 UTC | 3h 1m |
| 2026-05-23 | ORD → CUN | May 23, 15:55 UTC | May 23, 19:05 UTC | 3h 10m |
| 2026-05-23 | PDX → SFO | May 23, 11:25 UTC | May 23, 13:30 UTC | 2h 5m |
| 2026-05-23 | MSN → ORD | May 23, 00:05 UTC | May 23, 02:15 UTC | 2h 10m |
| 2026-05-22 | IAH → EWR | May 22, 21:45 UTC | May 22, 21:55 UTC | 10m |
| 2026-05-22 | IAH → EWR | May 22, 21:20 UTC | May 22, 21:45 UTC | 25m |
| 2026-05-22 | IAH → EWR | May 22, 21:02 UTC | May 22, 21:30 UTC | 28m |
| 2026-05-22 | LGA → DEN | May 22, 19:30 UTC | May 22, 19:55 UTC | 25m |
| 2026-05-22 | BOS → EWR | May 22, 15:45 UTC | May 22, 17:35 UTC | 1h 50m |
| 2026-05-22 | SFO → ORD | May 22, 12:35 UTC | May 22, 14:15 UTC | 1h 40m |
| 2026-05-22 | SAN → ORD | May 22, 00:40 UTC | May 22, 04:15 UTC | 3h 35m |
| 2026-05-21 | ORD → SAN | May 21, 19:35 UTC | May 21, 23:20 UTC | 3h 45m |
| 2026-05-21 | SJC → DEN | May 21, 16:45 UTC | May 21, 17:30 UTC | 45m |
| 2026-05-21 | SJC → DEN | May 21, 15:00 UTC | May 21, 17:30 UTC | 2h 30m |
| 2026-05-21 | MFE → IAH | May 21, 11:25 UTC | May 21, 13:35 UTC | 2h 10m |
| 2026-05-20 | EWR → ATL | May 20, 23:55 UTC | May 21, 02:40 UTC | 2h 45m |
| 2026-05-20 | ORD → MSN | May 20, 18:45 UTC | May 20, 22:00 UTC | 3h 15m |
| 2026-05-20 | ORD → ALB | May 20, 14:20 UTC | May 20, 16:05 UTC | 1h 45m |
| 2026-05-20 | MEX → EWR | May 20, 04:10 UTC | May 20, 06:05 UTC | 1h 56m |
| 2026-05-20 | MEX → EWR | May 20, 03:30 UTC | May 20, 06:02 UTC | 2h 32m |
| 2026-05-19 | ORD → DCA | May 19, 22:35 UTC | May 20, 00:50 UTC | 2h 15m |
| 2026-05-19 | EWR → SFO | May 19, 20:20 UTC | May 19, 21:20 UTC | 1h 0m |
| 2026-05-19 | ITO → LAX | May 19, 01:30 UTC | May 19, 04:35 UTC | 3h 5m |
| 2026-05-18 | DEN → EWR | May 18, 20:55 UTC | May 18, 23:45 UTC | 2h 50m |
| 2026-05-18 | SFO → IAH | May 18, 13:15 UTC | May 18, 17:45 UTC | 4h 30m |
| 2026-05-18 | SFO → CUN | May 18, 06:55 UTC | May 18, 11:40 UTC | 4h 45m |
| 2026-05-18 | DTW → ORD | May 18, 03:30 UTC | May 18, 04:30 UTC | 1h 0m |
Specifications
| Registration | N39423 |
| Aircraft type | BOEING 737-900 (B739) |
| Operator | UNITED AIRLINES INC |
| Mode-S code | A4945F · 51112137 (octal) |
Looking for transponder-level data? View the Mode-S A4945F page for country allocation, callsign history, and ADS-B signal details.
N39423 frequently asked
What type of aircraft is N39423?
N39423 is a BOEING 737-900 (ICAO type code B739).
Who operates N39423?
N39423 is operated by UNITED AIRLINES INC.
What is the Mode-S transponder code for N39423?
N39423 broadcasts on Mode-S (ICAO 24-bit) address A4945F (octal 51112137). View the transponder page.
What route does N39423 typically fly?
N39423 most frequently flies between SJC and DEN based on observed flights.
Where is N39423 right now?
N39423 is currently airborne flying as UAL546. Live position is shown on the map above.