Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A0B550

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N145AN · AIRBUS A-321 · operated by AMERICAN AIRLINES INC

Hex
A0B550
Octal
50132520
Decimal
10,532,176
Country
US
Tail
N145AN
Type
A321
No current signal · last broadcast Jul 26, 22:00 UTC
Flights observed
495
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:00 UTC

Last known position

Most recent position reported by Mode-S A0B550.

Country allocation

The ICAO 24-bit address A0B550 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
AAL2832 American Airlines 9 2026-07-23
AAL514 - 7 2026-07-15
AAL402 - 7 2026-06-21
AAL3320 American Airlines 7 2026-07-23
AAL1847 - 6 2026-07-15
AAL605 American Airlines 5 2026-04-17
AAL2286 - 5 2026-07-06
AAL1919 - 5 2026-07-14
AAL903 American Airlines 4 2026-06-16
AAL727 American Airlines 4 2026-05-20
AAL662 - 4 2026-07-17
AAL599 - 4 2026-07-08
AAL364 - 4 2026-07-08
AAL2852 American Airlines 4 2026-05-03
AAL2219 American Airlines 4 2026-06-03
AAL2166 American Airlines 4 2026-05-10
AAL2090 American Airlines 4 2026-04-20
AAL2081 American Airlines 4 2026-07-19
AAL1451 American Airlines 4 2026-04-17
AAL1055 American Airlines 4 2026-06-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL2676 EWR → PHX Jul 26, 14:00 UTCJul 26, 22:00 UTC8h 0m
2026-07-26 AAL1896 MCO → CLT Jul 26, 09:25 UTCJul 26, 10:35 UTC1h 10m
2026-07-26 AAL1879 CLT → MCO Jul 26, 04:15 UTCJul 26, 05:20 UTC1h 5m
2026-07-26 AAL2100 MCI → DFW Jul 26, 01:40 UTCJul 26, 02:55 UTC1h 15m
2026-07-25 AAL2100 MCI → DFW Jul 25, 23:00 UTCJul 26, 00:05 UTC1h 5m
2026-07-25 AAL1877 CLT → PVD Jul 25, 19:30 UTCJul 25, 21:25 UTC1h 55m
2026-07-25 AAL1877 CLT → PVD Jul 25, 16:25 UTCJul 25, 17:50 UTC1h 25m
2026-07-25 AAL1229 CLE → DFW Jul 25, 00:20 UTCJul 25, 02:20 UTC2h 0m
2026-07-24 AAL2613 MSY → ORD Jul 24, 20:30 UTCJul 24, 22:40 UTC2h 10m
2026-07-24 AAL2613 MSY → ORD Jul 24, 16:50 UTCJul 24, 19:00 UTC2h 10m
2026-07-24 AAL1090 TUL → DFW Jul 24, 13:40 UTCJul 24, 15:05 UTC1h 25m
2026-07-23 AAL1736 DFW → MSN Jul 23, 23:30 UTCJul 24, 02:35 UTC3h 5m
2026-07-23 AAL2832 DFW → SFO Jul 23, 19:35 UTCJul 23, 20:50 UTC1h 15m
2026-07-23 AAL2832 DFW → SFO Jul 23, 17:05 UTCJul 23, 18:20 UTC1h 15m
2026-07-23 AAL3320 PWM → PHL Jul 23, 14:20 UTCJul 23, 15:30 UTC1h 10m
2026-07-23 AAL3320 PWM → PHL Jul 23, 12:05 UTCJul 23, 13:15 UTC1h 10m
2026-07-23 AAL1454 - Jul 23, 05:45 UTCJul 23, 09:30 UTC3h 45m
2026-07-23 AAL1454 LAS → CLT Jul 23, 05:44 UTCJul 23, 09:31 UTC3h 47m
2026-07-22 AAL596 LAX → PHL Jul 22, 23:55 UTCJul 23, 03:55 UTC4h 0m
2026-07-22 AAL2784 DCA → ORD Jul 22, 21:05 UTCJul 22, 22:25 UTC1h 20m
2026-07-22 AAL2772 JFK → AUS Jul 22, 16:05 UTCJul 22, 19:55 UTC3h 50m
2026-07-22 AAL2027 DCA → LGA Jul 22, 13:25 UTCJul 22, 14:25 UTC1h 0m
2026-07-22 AAL2027 DCA → LGA Jul 22, 13:24 UTCJul 22, 14:20 UTC56m
2026-07-22 AAL613 DFW → EWR Jul 22, 03:39 UTCJul 22, 07:29 UTC3h 50m
2026-07-22 AAL613 DFW → EWR Jul 22, 03:40 UTCJul 22, 05:25 UTC1h 45m
2026-07-21 AAL619 - Jul 21, 13:50 UTCJul 21, 23:50 UTC10h 0m
2026-07-20 AAL215 - Jul 20, 20:50 UTCJul 21, 00:30 UTC3h 40m
2026-07-20 AAL492 - Jul 20, 16:30 UTCJul 20, 19:25 UTC2h 55m
2026-07-20 AAL938 MCO → ORD Jul 20, 12:05 UTCJul 20, 14:30 UTC2h 25m
2026-07-19 AAL2974 DFW → MCO Jul 19, 22:35 UTCJul 20, 00:50 UTC2h 15m
2026-07-19 AAL2974 DFW → MCO Jul 19, 22:35 UTCJul 20, 00:50 UTC2h 15m
2026-07-19 AAL2081 SMF → DFW Jul 19, 18:40 UTCJul 19, 20:55 UTC2h 15m
2026-07-19 AAL2081 SMF → DFW Jul 19, 15:15 UTCJul 19, 17:30 UTC2h 15m
2026-07-19 AAL1214 SLC → DFW Jul 19, 11:15 UTCJul 19, 13:25 UTC2h 10m
2026-07-19 AAL2993 - Jul 19, 04:00 UTCJul 19, 06:10 UTC2h 10m
2026-07-19 AAL2993 DFW → SLC Jul 19, 03:59 UTCJul 19, 06:10 UTC2h 11m
2026-07-18 AAL2041 - Jul 18, 23:25 UTCJul 19, 02:15 UTC2h 50m
2026-07-18 AAL3240 - Jul 18, 16:05 UTCJul 18, 21:45 UTC5h 40m
2026-07-18 AAL2558 - Jul 18, 11:15 UTCJul 18, 13:45 UTC2h 30m
2026-07-18 AAL2558 FLL → DFW Jul 18, 11:11 UTCJul 18, 13:44 UTC2h 33m
2026-07-18 AAL321 - Jul 18, 01:34 UTCJul 18, 03:05 UTC1h 31m
2026-07-17 AAL2832 - Jul 17, 22:45 UTCJul 18, 00:00 UTC1h 15m
2026-07-17 AAL2832 - Jul 17, 20:29 UTCJul 17, 21:15 UTC45m
2026-07-17 AAL2832 - Jul 17, 18:40 UTCJul 17, 19:05 UTC25m
2026-07-17 AAL2832 - Jul 17, 17:05 UTCJul 17, 19:05 UTC2h 0m
2026-07-17 AAL2832 CLT → TPA Jul 17, 17:01 UTCJul 17, 18:22 UTC1h 21m
2026-07-17 AAL573 - Jul 17, 12:55 UTCJul 17, 15:40 UTC2h 45m
2026-07-17 AAL662 - Jul 17, 04:39 UTCJul 17, 06:00 UTC1h 20m
2026-07-17 AAL662 DFW → DEN Jul 17, 04:39 UTCJul 17, 06:17 UTC1h 38m
2026-07-17 AAL1322 - Jul 17, 01:15 UTCJul 17, 02:50 UTC1h 35m

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 N145AN page for operator, model, and routing details .

Mode-S A0B550 frequently asked

What is Mode-S code A0B550?
A0B550 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N145AN.
Where is Mode-S A0B550 registered?
Mode-S code A0B550 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 A0B550 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0B550, octal 50132520, decimal 10,532,176.
What flights does A0B550 operate?
Mode-S A0B550 has broadcast 20 distinct callsigns, including AAL2832, AAL514, AAL402, AAL3320, AAL1847.