Apparatus

Try JFK, AAL1290, BAW, or N225AN.

flight Aircraft

N37440

BOEING 737 MAX 9

Operated by UNITED AIRLINES INC

Tail number
N37440
Type
B39M
Mode-S
A445A4
Airborne now · flying as UAL1640 at 33,000 ft
Flights observed
420 showing last 50
Avg flight time
3h 13m
Typical route
BOS → ORD
Last seen
1h ago

Live position

N37440 is currently airborne. Map zoomed to live position.

Recent flights last 50

DateRouteTakeoffLandingDuration
2026-07-13 ORD → FAI Jul 13, 21:45 UTCJul 14, 03:40 UTC5h 55m
2026-07-13 - Jul 13, 16:25 UTCJul 13, 18:05 UTC1h 40m
2026-07-13 - Jul 13, 12:50 UTCJul 13, 14:25 UTC1h 35m
2026-07-13 BOS → ORD Jul 13, 02:35 UTCJul 13, 04:35 UTC2h 0m
2026-07-13 BOS → ORD Jul 13, 02:35 UTCJul 13, 04:23 UTC1h 48m
2026-07-12 SFO → BOS Jul 12, 20:05 UTCJul 13, 01:20 UTC5h 15m
2026-07-12 AUS → SFO Jul 12, 14:05 UTCJul 12, 17:05 UTC3h 0m
2026-07-12 - Jul 12, 07:31 UTCJul 12, 10:35 UTC3h 5m
2026-07-12 - Jul 12, 00:50 UTCJul 12, 05:55 UTC5h 5m
2026-07-12 MIA → SFO Jul 12, 00:49 UTCJul 12, 05:54 UTC5h 5m
2026-07-11 - Jul 11, 16:15 UTCJul 11, 21:25 UTC5h 10m
2026-07-11 DEN → SFO Jul 11, 11:35 UTCJul 11, 13:40 UTC2h 5m
2026-07-11 SFO → DEN Jul 11, 04:25 UTCJul 11, 06:11 UTC1h 46m
2026-07-11 SFO → DEN Jul 11, 04:15 UTCJul 11, 06:15 UTC2h 0m
2026-07-10 - Jul 10, 21:30 UTCJul 11, 02:05 UTC4h 35m
2026-07-10 HNL → SFO Jul 10, 21:42 UTCJul 11, 02:01 UTC4h 19m
2026-07-10 - Jul 10, 14:20 UTCJul 10, 19:50 UTC5h 30m
2026-07-10 - Jul 10, 00:40 UTCJul 10, 06:35 UTC5h 55m
2026-07-09 BOS → LAX Jul 9, 23:47 UTCJul 10, 06:26 UTC6h 39m
2026-07-09 - Jul 9, 16:15 UTCJul 9, 21:10 UTC4h 55m
2026-07-09 - Jul 9, 13:10 UTCJul 9, 13:45 UTC35m
2026-07-09 - Jul 9, 03:20 UTCJul 9, 03:45 UTC25m
2026-07-08 - Jul 8, 22:20 UTCJul 9, 02:00 UTC3h 40m
2026-07-08 - Jul 8, 16:45 UTCJul 8, 19:20 UTC2h 35m
2026-07-08 ORD → MIA Jul 8, 12:33 UTCJul 8, 14:50 UTC2h 17m
2026-07-08 - Jul 8, 12:15 UTCJul 8, 14:50 UTC2h 35m
2026-07-08 BOS → ORD Jul 8, 02:20 UTCJul 8, 04:20 UTC2h 0m
2026-07-07 - Jul 7, 23:30 UTCJul 8, 00:55 UTC1h 25m
2026-07-07 - Jul 7, 19:40 UTCJul 7, 23:25 UTC3h 45m
2026-07-07 PHL → ORD Jul 7, 10:30 UTCJul 7, 15:50 UTC5h 20m
2026-07-07 - Jul 7, 02:00 UTCJul 7, 06:40 UTC4h 40m
2026-07-06 - Jul 6, 16:30 UTCJul 6, 22:10 UTC5h 40m
2026-07-06 IAD → BOS Jul 6, 13:05 UTCJul 6, 14:10 UTC1h 5m
2026-07-06 - Jul 6, 06:35 UTCJul 6, 11:20 UTC4h 45m
2026-07-06 - Jul 6, 04:15 UTCJul 6, 04:50 UTC35m
2026-07-06 - Jul 6, 00:00 UTCJul 6, 00:20 UTC20m
2026-07-05 SFO → KOA Jul 5, 22:15 UTCJul 5, 22:30 UTC15m
2026-07-05 SFO → KOA Jul 5, 17:35 UTCJul 5, 18:05 UTC30m
2026-07-05 - Jul 5, 10:55 UTCJul 5, 15:20 UTC4h 25m
2026-07-04 - Jul 4, 16:20 UTCJul 4, 19:00 UTC2h 40m
2026-07-04 SFO → DTW Jul 4, 16:17 UTCJul 4, 20:31 UTC4h 14m
2026-07-04 - Jul 4, 02:15 UTCJul 4, 06:55 UTC4h 40m
2026-07-04 SNA → SFO Jul 4, 00:15 UTCJul 4, 00:30 UTC15m
2026-07-03 SNA → SFO Jul 3, 19:30 UTCJul 3, 20:00 UTC30m
2026-07-03 - Jul 3, 11:50 UTCJul 3, 17:40 UTC5h 50m
2026-07-03 SFO → BOS Jul 3, 05:00 UTCJul 3, 10:15 UTC5h 15m
2026-07-03 - Jul 3, 00:00 UTCJul 3, 03:35 UTC3h 35m
2026-07-02 - Jul 2, 18:30 UTCJul 2, 21:45 UTC3h 15m
2026-07-02 - Jul 2, 13:05 UTCJul 2, 16:35 UTC3h 30m
2026-07-02 - Jul 2, 07:35 UTCJul 2, 10:50 UTC3h 15m

Specifications

Registration N37440
Aircraft type BOEING 737 MAX 9 (B39M)
Operator UNITED AIRLINES INC
Mode-S code A445A4 · 51042644 (octal)

Looking for transponder-level data? View the Mode-S A445A4 page for country allocation, callsign history, and ADS-B signal details.

N37440 frequently asked

What type of aircraft is N37440?
N37440 is a BOEING 737 MAX 9 (ICAO type code B39M).
Who operates N37440?
N37440 is operated by UNITED AIRLINES INC.
What is the Mode-S transponder code for N37440?
N37440 broadcasts on Mode-S (ICAO 24-bit) address A445A4 (octal 51042644). View the transponder page.
What route does N37440 typically fly?
N37440 most frequently flies between BOS and ORD based on observed flights.
Where is N37440 right now?
N37440 is currently airborne flying as UAL1640. Live position is shown on the map above.