Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A44560

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N37422 · BOEING 737-900 · operated by UNITED AIRLINES INC

Hex
A44560
Octal
51042540
Decimal
10,765,664
Country
US
Tail
N37422
Type
B739
No current signal · last broadcast Jul 26, 20:20 UTC
Flights observed
379
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:20 UTC

Last known position

Most recent position reported by Mode-S A44560.

Country allocation

The ICAO 24-bit address A44560 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
UAL1145 United Airlines 6 2026-06-01
UAL1075 - 5 2026-07-16
UAL539 United Airlines 4 2026-05-15
UAL2431 United Airlines 4 2026-04-13
UAL2336 - 4 2026-06-18
UAL2321 - 4 2026-06-28
UAL2255 United Airlines 4 2026-05-08
UAL2160 United Airlines 4 2026-05-15
UAL210 United Airlines 4 2026-06-03
UAL1653 United Airlines 4 2026-05-26
UAL644 - 3 2026-06-18
UAL312 United Airlines 3 2026-04-29
UAL2627 United Airlines 3 2026-07-21
UAL2623 - 3 2026-04-13
UAL2337 United Airlines 3 2026-04-17
UAL2120 United Airlines 3 2026-04-17
UAL2014 United Airlines 3 2026-07-20
UAL1922 United Airlines 3 2026-04-25
UAL1916 - 3 2026-06-25
UAL1900 - 3 2026-06-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 UAL2250 IAH → SAT Jul 26, 17:10 UTCJul 26, 20:00 UTC2h 50m
2026-07-26 UAL2250 IAH → SAT Jul 26, 17:14 UTCJul 26, 20:10 UTC2h 56m
2026-07-26 UAL8125 EWR → MSY Jul 26, 12:40 UTCJul 26, 15:25 UTC2h 45m
2026-07-25 UAL1997 AUA → EWR Jul 25, 23:15 UTCJul 26, 01:05 UTC1h 50m
2026-07-25 UAL8101 SFO → RNO Jul 25, 19:50 UTCJul 25, 21:35 UTC1h 45m
2026-07-25 UAL2054 MSY → IAH Jul 25, 16:20 UTCJul 25, 18:25 UTC2h 5m
2026-07-25 UAL2054 MSY → IAH Jul 25, 16:30 UTCJul 25, 18:22 UTC1h 52m
2026-07-25 UAL1406 EWR → CHS Jul 25, 13:00 UTCJul 25, 15:15 UTC2h 15m
2026-07-25 UAL1406 EWR → CHS Jul 25, 12:48 UTCJul 25, 15:14 UTC2h 26m
2026-07-25 UAL1524 IAH → EWR Jul 25, 10:15 UTCJul 25, 10:55 UTC40m
2026-07-25 UAL2677 CLE → DEN Jul 25, 02:55 UTCJul 25, 03:35 UTC40m
2026-07-25 UAL2677 CLE → DEN Jul 25, 02:50 UTCJul 25, 03:32 UTC42m
2026-07-24 UAL444 BNA → IAD Jul 24, 20:45 UTCJul 25, 01:10 UTC4h 25m
2026-07-24 UAL2177 PDX → ORD Jul 24, 18:20 UTCJul 24, 19:30 UTC1h 10m
2026-07-24 UAL2356 BUR → SFO Jul 24, 15:30 UTCJul 24, 16:35 UTC1h 5m
2026-07-24 UAL1995 RSW → EWR Jul 24, 04:10 UTCJul 24, 05:20 UTC1h 10m
2026-07-23 UAL382 IAH → SAT Jul 23, 22:20 UTCJul 24, 01:40 UTC3h 20m
2026-07-23 UAL2498 IAH → EWR Jul 23, 16:50 UTCJul 23, 20:10 UTC3h 20m
2026-07-23 UAL487 PHX → SFO Jul 23, 10:40 UTCJul 23, 14:00 UTC3h 20m
2026-07-23 UAL487 PHX → SFO Jul 23, 10:38 UTCJul 23, 13:58 UTC3h 20m
2026-07-23 UAL2430 ORD → ALB Jul 23, 00:40 UTCJul 23, 03:25 UTC2h 45m
2026-07-22 UAL2748 GSO → EWR Jul 22, 19:50 UTCJul 22, 22:45 UTC2h 55m
2026-07-22 UAL2497 ORD → BOS Jul 22, 03:00 UTCJul 22, 05:20 UTC2h 20m
2026-07-21 UAL1761 SAN → SFO Jul 21, 02:10 UTCJul 21, 03:55 UTC1h 45m
2026-07-21 UAL2627 EWR → ORD Jul 21, 00:00 UTCJul 21, 00:10 UTC10m
2026-07-20 UAL2627 EWR → ORD Jul 20, 21:50 UTCJul 21, 00:10 UTC2h 19m
2026-07-20 UAL2627 EWR → ORD Jul 20, 21:37 UTCJul 20, 23:44 UTC2h 7m
2026-07-20 UAL2643 DEN → BOS Jul 20, 17:15 UTCJul 20, 20:25 UTC3h 10m
2026-07-20 UAL1782 BOI → DEN Jul 20, 12:50 UTCJul 20, 14:20 UTC1h 30m
2026-07-20 UAL2014 DEN → SDF Jul 20, 01:55 UTCJul 20, 03:25 UTC1h 30m
2026-07-20 UAL2014 DEN → SDF Jul 20, 01:48 UTCJul 20, 03:22 UTC1h 34m
2026-07-19 UAL2852 EWR → DEN Jul 19, 20:20 UTCJul 19, 23:45 UTC3h 25m
2026-07-19 UAL2295 EWR → MIA Jul 19, 15:50 UTCJul 19, 18:15 UTC2h 25m
2026-07-19 UAL577 IAD → DEN Jul 19, 11:50 UTCJul 19, 13:55 UTC2h 5m
2026-07-17 UAL2463 IAD → MCO Jul 17, 21:39 UTCJul 17, 23:30 UTC1h 50m
2026-07-17 UAL1421 FLL → IAD Jul 17, 16:34 UTCJul 17, 18:34 UTC2h 0m
2026-07-17 UAL1825 IAD → FLL Jul 17, 12:30 UTCJul 17, 14:24 UTC1h 55m
2026-07-17 UAL2136 BOS → IAD Jul 17, 00:10 UTCJul 17, 01:25 UTC1h 15m
2026-07-16 UAL2136 BOS → IAD Jul 16, 23:44 UTCJul 17, 01:24 UTC1h 40m
2026-07-16 UAL1957 - Jul 16, 18:00 UTCJul 16, 21:15 UTC3h 15m
2026-07-16 UAL1059 - Jul 16, 12:55 UTCJul 16, 14:45 UTC1h 50m
2026-07-16 UAL1075 - Jul 16, 07:20 UTCJul 16, 11:34 UTC4h 15m
2026-07-16 UAL1075 LAX → CUN Jul 16, 07:14 UTCJul 16, 11:30 UTC4h 16m
2026-07-16 UAL8150 - Jul 16, 04:40 UTCJul 16, 05:45 UTC1h 5m
2026-07-15 UAL2251 - Jul 15, 21:45 UTCJul 16, 01:30 UTC3h 45m
2026-07-15 UAL745 ATL → ORD Jul 15, 17:45 UTCJul 15, 19:30 UTC1h 45m
2026-07-15 UAL530 - Jul 15, 14:40 UTCJul 15, 16:05 UTC1h 25m
2026-07-15 UAL2218 - Jul 15, 11:15 UTCJul 15, 12:15 UTC1h 0m
2026-07-15 UAL1946 - Jul 15, 00:15 UTCJul 15, 01:15 UTC1h 0m
2026-07-14 UAL1748 PHX → ORD Jul 14, 18:30 UTCJul 14, 21:40 UTC3h 10m

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 N37422 page for operator, model, and routing details .

Mode-S A44560 frequently asked

What is Mode-S code A44560?
A44560 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N37422.
Where is Mode-S A44560 registered?
Mode-S code A44560 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 A44560 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A44560, octal 51042540, decimal 10,765,664.
What flights does A44560 operate?
Mode-S A44560 has broadcast 20 distinct callsigns, including UAL1145, UAL1075, UAL539, UAL2431, UAL2336.