Apparatus

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sensors Mode-S transponder

A44238

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N37365 · BOEING 737 MAX 8 · operated by UNITED AIRLINES INC

Hex
A44238
Octal
51041070
Decimal
10,764,856
Country
US
Tail
N37365
Type
B38M
Broadcasting now · callsign UAL614 · 22,000 ft
Flights observed
455
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:00 UTC

Current position

A44238 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A44238 falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 20 distinct

Callsign Airline Flights Last seen
UAL269 United Airlines 6 2026-04-26
UAL1008 United Airlines 6 2026-04-16
UAL406 - 5 2026-06-25
UAL2392 - 5 2026-07-14
UAL2384 United Airlines 5 2026-07-21
UAL2298 United Airlines 5 2026-07-21
UAL205 United Airlines 5 2026-05-23
UAL1911 United Airlines 5 2026-04-26
UAL1862 - 5 2026-07-21
UAL1753 - 5 2026-07-15
UAL1009 United Airlines 5 2026-04-16
UAL840 United Airlines 4 2026-06-22
UAL508 United Airlines 4 2026-05-27
UAL359 - 4 2026-06-21
UAL280 - 4 2026-06-19
UAL2423 United Airlines 4 2026-04-14
UAL209 United Airlines 4 2026-04-26
UAL206 - 4 2026-06-26
UAL1985 - 4 2026-07-14
UAL1975 - 4 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL1592 DEN → BOS Jul 26, 21:55 UTCJul 26, 22:00 UTC5m
2026-07-26 UAL2663 PSP → SFO Jul 26, 20:00 UTCJul 26, 20:25 UTC25m
2026-07-26 UAL1378 JAC → DEN Jul 26, 18:10 UTCJul 26, 18:25 UTC15m
2026-07-26 UAL690 SEA → SFO Jul 26, 13:05 UTCJul 26, 15:50 UTC2h 45m
2026-07-23 UAL2476 SAN → DEN Jul 23, 20:15 UTCJul 23, 22:30 UTC2h 15m
2026-07-23 UAL2246 RSW → EWR Jul 23, 15:30 UTCJul 23, 18:25 UTC2h 55m
2026-07-23 UAL2246 RSW → EWR Jul 23, 15:22 UTCJul 23, 18:15 UTC2h 53m
2026-07-22 UAL2476 - Jul 22, 20:20 UTCJul 22, 22:40 UTC2h 20m
2026-07-22 UAL2285 ORD → EWR Jul 22, 15:55 UTCJul 22, 17:55 UTC2h 0m
2026-07-21 UAL2384 ORD → SFO Jul 21, 23:50 UTCJul 22, 05:05 UTC5h 15m
2026-07-21 UAL1862 - Jul 21, 19:55 UTCJul 21, 21:35 UTC1h 40m
2026-07-21 UAL2298 SFO → PHX Jul 21, 14:05 UTCJul 21, 16:05 UTC2h 0m
2026-07-21 UAL2681 DEN → SFO Jul 21, 07:20 UTCJul 21, 12:15 UTC4h 55m
2026-07-20 UAL2384 ORD → SFO Jul 20, 23:30 UTCJul 21, 05:10 UTC5h 39m
2026-07-20 UAL1862 - Jul 20, 19:55 UTCJul 20, 21:40 UTC1h 45m
2026-07-20 UAL1862 ORD → YUL Jul 20, 19:41 UTCJul 20, 21:35 UTC1h 54m
2026-07-20 UAL2298 SFO → PHX Jul 20, 14:10 UTCJul 20, 15:55 UTC1h 45m
2026-07-20 UAL2298 SFO → PHX Jul 20, 14:06 UTCJul 20, 15:45 UTC1h 39m
2026-07-20 UAL2681 DEN → SFO Jul 20, 07:15 UTCJul 20, 11:55 UTC4h 40m
2026-07-20 UAL2799 ORD → SFO Jul 20, 00:10 UTCJul 20, 04:15 UTC4h 5m
2026-07-19 UAL1902 - Jul 19, 18:55 UTCJul 19, 22:40 UTC3h 45m
2026-07-19 UAL2818 PDX → SFO Jul 19, 14:25 UTCJul 19, 15:55 UTC1h 30m
2026-07-19 UAL2384 ORD → SFO Jul 19, 06:35 UTCJul 19, 07:45 UTC1h 10m
2026-07-19 UAL2384 ORD → SFO Jul 19, 06:33 UTCJul 19, 07:49 UTC1h 16m
2026-07-18 UAL2384 ORD → SFO Jul 18, 23:05 UTCJul 19, 04:30 UTC5h 25m
2026-07-18 UAL1862 - Jul 18, 19:30 UTCJul 18, 21:10 UTC1h 40m
2026-07-18 UAL1862 ORD → YUL Jul 18, 19:41 UTCJul 18, 21:06 UTC1h 25m
2026-07-18 UAL2298 SFO → PHX Jul 18, 14:30 UTCJul 18, 16:20 UTC1h 50m
2026-07-18 UAL2298 SFO → PHX Jul 18, 14:21 UTCJul 18, 16:13 UTC1h 52m
2026-07-18 UAL8120 YHZ → BOS Jul 18, 07:55 UTCJul 18, 12:45 UTC4h 50m
2026-07-18 UAL2482 STL → SFO Jul 18, 02:09 UTCJul 18, 05:45 UTC3h 36m
2026-07-17 UAL2090 SFO → STL Jul 17, 19:40 UTCJul 17, 23:10 UTC3h 30m
2026-07-17 UAL2090 SFO → STL Jul 17, 19:34 UTCJul 17, 23:10 UTC3h 36m
2026-07-17 UAL369 DCA → SFO Jul 17, 12:10 UTCJul 17, 16:59 UTC4h 50m
2026-07-16 UAL2386 SFO → DCA Jul 16, 21:55 UTCJul 17, 02:34 UTC4h 40m
2026-07-16 UAL2619 PHX → SFO Jul 16, 18:55 UTCJul 16, 20:29 UTC1h 35m
2026-07-16 UAL2374 - Jul 16, 15:19 UTCJul 16, 16:55 UTC1h 35m
2026-07-16 UAL1685 LIH → SFO Jul 16, 08:57 UTCJul 16, 13:27 UTC4h 30m
2026-07-16 UAL1685 LIH → SFO Jul 16, 08:57 UTCJul 16, 13:15 UTC4h 18m
2026-07-16 UAL1684 - Jul 16, 00:15 UTCJul 16, 05:10 UTC4h 55m
2026-07-15 UAL1763 - Jul 15, 21:10 UTCJul 15, 22:15 UTC1h 5m
2026-07-15 UAL1626 EWR → SAN Jul 15, 14:40 UTCJul 15, 19:20 UTC4h 40m
2026-07-15 UAL1753 - Jul 15, 11:10 UTCJul 15, 12:20 UTC1h 10m
2026-07-15 UAL1753 RDU → EWR Jul 15, 11:16 UTCJul 15, 12:21 UTC1h 5m
2026-07-14 UAL1975 EWR → RDU Jul 14, 22:40 UTCJul 14, 23:45 UTC1h 4m
2026-07-14 UAL2392 - Jul 14, 19:05 UTCJul 14, 20:00 UTC55m
2026-07-14 UAL1985 - Jul 14, 14:50 UTCJul 14, 15:20 UTC30m
2026-07-14 UAL2455 RSW → EWR Jul 14, 10:10 UTCJul 14, 12:40 UTC2h 30m
2026-07-13 UAL1845 - Jul 13, 23:25 UTCJul 14, 01:55 UTC2h 30m
2026-07-13 UAL297 - Jul 13, 11:50 UTCJul 13, 21:35 UTC9h 45m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the N37365 page for operator, model, and routing details .

Mode-S A44238 frequently asked

What is Mode-S code A44238?
A44238 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N37365.
Where is Mode-S A44238 registered?
Mode-S code A44238 is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is A44238 broadcasting right now?
Yes. Mode-S A44238 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A44238, octal 51041070, decimal 10,764,856.
What flights does A44238 operate?
Mode-S A44238 has broadcast 20 distinct callsigns, including UAL269, UAL1008, UAL406, UAL2392, UAL2384.