Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A54AAA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N440AN · AIRBUS A-321neo · operated by BANK OF UTAH TRUSTEE

Hex
A54AAA
Octal
51245252
Decimal
10,832,554
Country
US
Tail
N440AN
Type
A21N
No current signal · last broadcast Jul 26, 12:10 UTC
Flights observed
467
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 12:10 UTC

Last known position

Most recent position reported by Mode-S A54AAA.

Country allocation

The ICAO 24-bit address A54AAA 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
AAL1299 American Airlines 11 2026-04-26
AAL2405 - 10 2026-07-17
AAL779 - 9 2026-06-27
AAL31 - 9 2026-07-02
AAL1966 American Airlines 9 2026-05-18
AAL385 American Airlines 7 2026-07-23
AAL315 American Airlines 7 2026-07-23
AAL2853 American Airlines 7 2026-05-15
AAL2831 American Airlines 7 2026-05-18
AAL1355 American Airlines 7 2026-05-30
AAL917 - 6 2026-06-13
AAL591 American Airlines 6 2026-04-16
AAL2236 American Airlines 6 2026-04-17
AAL2045 - 6 2026-07-13
AAL1558 - 6 2026-07-23
AAL778 - 5 2026-07-17
AAL3202 American Airlines 5 2026-05-09
AAL3136 American Airlines 5 2026-07-08
AAL162 - 5 2026-07-02
AAL1362 American Airlines 5 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL760 PHL → ATL Jul 26, 10:10 UTCJul 26, 12:00 UTC1h 50m
2026-07-26 AAL1881 MCO → PHL Jul 26, 02:20 UTCJul 26, 05:10 UTC2h 50m
2026-07-26 AAL1881 MCO → PHL Jul 26, 02:16 UTCJul 26, 05:06 UTC2h 50m
2026-07-25 AAL1983 MIA → PHX Jul 25, 20:15 UTCJul 26, 00:35 UTC4h 20m
2026-07-25 AAL186 CUN → PHX Jul 25, 00:25 UTCJul 25, 03:55 UTC3h 30m
2026-07-24 AAL515 PHX → CUN Jul 24, 16:15 UTCJul 24, 20:05 UTC3h 50m
2026-07-24 AAL515 PHX → CUN Jul 24, 16:10 UTCJul 24, 20:00 UTC3h 50m
2026-07-24 AAL1362 BNA → ORD Jul 24, 03:20 UTCJul 24, 04:20 UTC1h 0m
2026-07-23 AAL315 JFK → MIA Jul 23, 20:20 UTCJul 24, 00:30 UTC4h 10m
2026-07-23 AAL315 JFK → MIA Jul 23, 20:17 UTCJul 24, 00:48 UTC4h 31m
2026-07-23 AAL1558 - Jul 23, 11:55 UTCJul 23, 12:30 UTC35m
2026-07-23 AAL1558 LIM → MIA Jul 23, 11:36 UTCJul 23, 16:58 UTC5h 22m
2026-07-23 AAL385 BOS → DFW Jul 23, 04:05 UTCJul 23, 08:55 UTC4h 50m
2026-07-22 AAL1983 MIA → PHX Jul 22, 21:10 UTCJul 23, 01:25 UTC4h 15m
2026-07-22 AAL332P PHX → ORD Jul 22, 17:00 UTCJul 22, 20:00 UTC3h 0m
2026-07-21 AAL9604 SEA → ORD Jul 21, 21:40 UTCJul 22, 01:10 UTC3h 30m
2026-07-21 AAL9604 SEA → ORD Jul 21, 21:37 UTCJul 22, 01:01 UTC3h 24m
2026-07-19 AAL2009 SFO → PHL Jul 19, 22:15 UTCJul 20, 02:00 UTC3h 45m
2026-07-19 AAL3218 SFO → LAX Jul 19, 17:50 UTCJul 19, 20:35 UTC2h 45m
2026-07-17 AAL778 - Jul 17, 22:45 UTCJul 18, 03:20 UTC4h 36m
2026-07-17 AAL778 MIA → LAX Jul 17, 22:42 UTCJul 18, 03:20 UTC4h 38m
2026-07-17 AAL2405 - Jul 17, 17:09 UTCJul 17, 18:44 UTC1h 35m
2026-07-17 AAL2405 RDU → MIA Jul 17, 17:05 UTCJul 17, 18:44 UTC1h 39m
2026-07-17 AAL2405 - Jul 17, 14:20 UTCJul 17, 15:55 UTC1h 35m
2026-07-17 AAL918 - Jul 17, 06:00 UTCJul 17, 11:00 UTC5h 0m
2026-07-17 AAL918 LIM → MIA Jul 17, 05:44 UTCJul 17, 10:50 UTC5h 6m
2026-07-16 AAL1307 - Jul 16, 22:35 UTCJul 17, 00:25 UTC1h 50m
2026-07-16 AAL1307 MIA → LIM Jul 16, 22:34 UTCJul 17, 04:03 UTC5h 29m
2026-07-16 AAL1558 - Jul 16, 12:00 UTCJul 16, 16:55 UTC4h 55m
2026-07-16 AAL385 - Jul 16, 03:45 UTCJul 16, 08:30 UTC4h 45m
2026-07-16 AAL385 MIA → LIM Jul 16, 03:41 UTCJul 16, 08:45 UTC5h 4m
2026-07-15 AAL1983 - Jul 15, 20:20 UTCJul 16, 00:25 UTC4h 5m
2026-07-15 AAL2369 JFK → PHX Jul 15, 11:35 UTCJul 15, 15:45 UTC4h 10m
2026-07-14 AAL1922 - Jul 14, 22:40 UTCJul 15, 01:10 UTC2h 29m
2026-07-14 AAL2906 - Jul 14, 20:00 UTCJul 14, 20:30 UTC30m
2026-07-14 AAL2906 UVF → MIA Jul 14, 17:13 UTCJul 14, 20:25 UTC3h 12m
2026-07-14 AAL2906 - Jul 14, 12:35 UTCJul 14, 13:00 UTC25m
2026-07-14 AAL1545 SFO → MIA Jul 14, 05:10 UTCJul 14, 10:15 UTC5h 5m
2026-07-13 AAL2045 - Jul 13, 22:20 UTCJul 14, 03:15 UTC4h 55m
2026-07-13 AAL2045 PHL → PHL Jul 13, 20:45 UTCJul 13, 21:00 UTC15m
2026-07-13 AAL2045 PHL → PHL Jul 13, 19:55 UTCJul 13, 20:15 UTC20m
2026-07-13 AAL1151 - Jul 13, 14:20 UTCJul 13, 19:20 UTC5h 0m
2026-07-13 AAL58 - Jul 13, 07:50 UTCJul 13, 08:30 UTC40m
2026-07-13 AAL58 - Jul 13, 03:15 UTCJul 13, 03:25 UTC10m
2026-07-12 AAL663 PHX → KOA Jul 12, 19:20 UTCJul 13, 00:55 UTC5h 35m
2026-07-12 AAL663 - Jul 12, 19:20 UTCJul 12, 20:30 UTC1h 10m
2026-07-12 AAL2369 JFK → PHX Jul 12, 11:25 UTCJul 12, 15:55 UTC4h 30m
2026-07-12 AAL2369 JFK → PHX Jul 12, 11:25 UTCJul 12, 15:53 UTC4h 28m
2026-07-12 AAL1587 PHX → JFK Jul 12, 05:28 UTCJul 12, 09:54 UTC4h 26m
2026-07-12 AAL1587 PHX → JFK Jul 12, 05:30 UTCJul 12, 09:50 UTC4h 20m

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 N440AN page for operator, model, and routing details .

Mode-S A54AAA frequently asked

What is Mode-S code A54AAA?
A54AAA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N440AN.
Where is Mode-S A54AAA registered?
Mode-S code A54AAA 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 A54AAA broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 12:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A54AAA, octal 51245252, decimal 10,832,554.
What flights does A54AAA operate?
Mode-S A54AAA has broadcast 20 distinct callsigns, including AAL1299, AAL2405, AAL779, AAL31, AAL1966.