sensors Mode-S transponder

A5AFF2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N466AN · AIRBUS A-321neo · operated by AMERICAN AIRLINES INC

Hex
A5AFF2
Octal
51327762
Decimal
10,858,482
Country
US
Tail
N466AN
Type
A21N
No current signal · last broadcast 22h ago
Flights observed
12
Distinct callsigns
7
Country
US
Last broadcast
22h ago

Last known position

Most recent position reported by Mode-S A5AFF2.

Country allocation

The ICAO 24-bit address A5AFF2 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 7 distinct

Callsign Airline Flights Last seen
AAL2746 American Airlines 3 2026-04-13
AAL9827 - 2 2026-04-13
AAL2609 American Airlines 2 2026-04-13
AAL2352 - 2 2026-04-14
AAL9734 American Airlines 1 2026-04-13
AAL2408 - 1 2026-04-12
AAL1675 American Airlines 1 2026-04-13

Recent flights last 12

DateFlightRouteTakeoffLandingDuration
2026-04-14 AAL2352 - Apr 14, 07:10 UTCApr 14, 09:05 UTC1h 55m
2026-04-14 AAL2352 - Apr 14, 05:54 UTCApr 14, 09:28 UTC3h 34m
2026-04-13 AAL1675 LAX → PHX Apr 13, 22:55 UTCApr 13, 23:40 UTC45m
2026-04-13 AAL2609 GUC → DFW Apr 13, 20:28 UTCApr 13, 21:13 UTC45m
2026-04-13 AAL2609 GUC → DFW Apr 13, 18:30 UTCApr 13, 19:10 UTC40m
2026-04-13 AAL2746 MSY → PHL Apr 13, 16:15 UTCApr 13, 16:45 UTC30m
2026-04-13 AAL2746 MSY → PHL Apr 13, 15:50 UTCApr 13, 16:45 UTC55m
2026-04-13 AAL2746 MSY → PHL Apr 13, 14:12 UTCApr 13, 16:46 UTC2h 34m
2026-04-13 AAL9827 - Apr 13, 04:20 UTCApr 13, 05:00 UTC40m
2026-04-13 AAL9827 - Apr 13, 04:00 UTCApr 13, 05:03 UTC1h 3m
2026-04-13 AAL9734 PHX → DFW Apr 13, 01:50 UTCApr 13, 02:54 UTC1h 4m
2026-04-12 AAL2408 - Apr 12, 17:15 UTCApr 12, 20:15 UTC3h 0m

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 N466AN page for operator, model, and routing details .

Mode-S A5AFF2 frequently asked

What is Mode-S code A5AFF2?
A5AFF2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N466AN.
Where is Mode-S A5AFF2 registered?
Mode-S code A5AFF2 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 A5AFF2 broadcasting right now?
No active broadcast right now. Last signal was 22h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A5AFF2, octal 51327762, decimal 10,858,482.
What flights does A5AFF2 operate?
Mode-S A5AFF2 has broadcast 7 distinct callsigns, including AAL2746, AAL9827, AAL2609, AAL2352, AAL9734.