Apparatus

Try JFK, AAL1290, BAW, or N225AN.

flight Aircraft

N39423

BOEING 737-900

Operated by UNITED AIRLINES INC

Tail number
N39423
Type
B739
Mode-S
A4945F
Not currently tracked · last seen 5h ago
Flights observed
367 showing last 50
Avg flight time
2h 5m
Typical route
YYZ → ORD
Last seen
5h ago

Last known area

Map centered near N39423's most recent activity.

Recent flights last 50

DateRouteTakeoffLandingDuration
2026-07-14 - Jul 14, 03:00 UTCJul 14, 04:45 UTC1h 45m
2026-07-13 - Jul 13, 22:25 UTCJul 14, 01:05 UTC2h 40m
2026-07-13 CLE → IAH Jul 13, 22:10 UTCJul 14, 00:55 UTC2h 45m
2026-07-13 - Jul 13, 15:30 UTCJul 13, 17:45 UTC2h 15m
2026-07-13 - Jul 13, 11:40 UTCJul 13, 14:00 UTC2h 20m
2026-07-13 CLE → FLL Jul 13, 11:43 UTCJul 13, 14:01 UTC2h 18m
2026-07-12 - Jul 12, 23:20 UTCJul 13, 00:05 UTC45m
2026-07-12 MSY → ORD Jul 12, 19:10 UTCJul 12, 21:05 UTC1h 55m
2026-07-12 ORD → MSY Jul 12, 15:45 UTCJul 12, 17:30 UTC1h 45m
2026-07-12 MSP → ORD Jul 12, 12:52 UTCJul 12, 13:25 UTC33m
2026-07-12 - Jul 12, 12:40 UTCJul 12, 13:30 UTC50m
2026-07-12 ORD → MSP Jul 12, 03:15 UTCJul 12, 04:10 UTC55m
2026-07-11 - Jul 11, 22:35 UTCJul 12, 00:45 UTC2h 10m
2026-07-11 - Jul 11, 18:45 UTCJul 11, 20:55 UTC2h 10m
2026-07-11 ORD → IAH Jul 11, 18:47 UTCJul 11, 20:57 UTC2h 10m
2026-07-11 - Jul 11, 16:15 UTCJul 11, 17:15 UTC1h 0m
2026-07-11 ORD → CLE Jul 11, 13:10 UTCJul 11, 13:55 UTC45m
2026-07-11 - Jul 11, 00:25 UTCJul 11, 03:45 UTC3h 20m
2026-07-11 SEA → ORD Jul 11, 00:33 UTCJul 11, 03:41 UTC3h 8m
2026-07-10 ORD → SEA Jul 10, 18:55 UTCJul 10, 22:40 UTC3h 45m
2026-07-10 YYZ → ORD Jul 10, 15:30 UTCJul 10, 17:00 UTC1h 30m
2026-07-10 - Jul 10, 12:55 UTCJul 10, 13:55 UTC1h 0m
2026-07-10 PDX → ORD Jul 10, 06:55 UTCJul 10, 10:25 UTC3h 30m
2026-07-10 ORD → PDX Jul 10, 01:32 UTCJul 10, 05:09 UTC3h 37m
2026-07-10 ORD → PDX Jul 10, 01:25 UTCJul 10, 05:10 UTC3h 45m
2026-07-09 - Jul 9, 21:30 UTCJul 9, 23:35 UTC2h 5m
2026-07-09 - Jul 9, 18:20 UTCJul 9, 19:50 UTC1h 30m
2026-07-09 - Jul 9, 14:30 UTCJul 9, 16:45 UTC2h 15m
2026-07-09 - Jul 9, 04:30 UTCJul 9, 06:20 UTC1h 50m
2026-07-08 PHX → DEN Jul 8, 23:35 UTCJul 9, 01:00 UTC1h 25m
2026-07-08 - Jul 8, 18:50 UTCJul 8, 21:55 UTC3h 5m
2026-07-08 YYZ → ORD Jul 8, 15:15 UTCJul 8, 16:40 UTC1h 25m
2026-07-08 SFO → IAD Jul 8, 12:42 UTCJul 8, 13:36 UTC54m
2026-07-08 SFO → IAD Jul 8, 12:35 UTCJul 8, 13:40 UTC1h 5m
2026-07-05 - Jul 5, 20:50 UTCJul 5, 22:30 UTC1h 40m
2026-07-05 - Jul 5, 18:45 UTCJul 5, 19:10 UTC25m
2026-07-03 - Jul 3, 21:10 UTCJul 4, 00:40 UTC3h 30m
2026-07-03 RDU → DEN Jul 3, 20:58 UTCJul 4, 00:35 UTC3h 37m
2026-07-03 DEN → RDU Jul 3, 16:10 UTCJul 3, 19:10 UTC3h 0m
2026-07-03 - Jul 3, 13:05 UTCJul 3, 14:10 UTC1h 5m
2026-07-03 - Jul 3, 02:05 UTCJul 3, 03:10 UTC1h 5m
2026-07-03 DEN → BIL Jul 3, 02:00 UTCJul 3, 03:08 UTC1h 8m
2026-07-02 - Jul 2, 21:05 UTCJul 3, 00:15 UTC3h 10m
2026-07-02 DEN → RDU Jul 2, 16:40 UTCJul 2, 19:40 UTC3h 0m
2026-07-02 SLC → DEN Jul 2, 13:30 UTCJul 2, 14:45 UTC1h 15m
2026-07-02 DEN → SLC Jul 2, 01:35 UTCJul 2, 02:35 UTC1h 0m
2026-07-01 IAD → DEN Jul 1, 20:10 UTCJul 1, 23:30 UTC3h 20m
2026-07-01 - Jul 1, 16:25 UTCJul 1, 18:30 UTC2h 5m
2026-07-01 LAX → ORD Jul 1, 01:15 UTCJul 1, 03:30 UTC2h 15m
2026-06-30 PHX → EWR Jun 30, 18:50 UTCJun 30, 23:00 UTC4h 10m

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 YYZ and ORD based on observed flights.
Where is N39423 right now?
N39423 is not currently being tracked; last seen 5h ago.