Apparatus

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sensors Mode-S transponder

AB5C12

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N831AA · BOEING 787-9 Dreamliner · operated by AMERICAN AIRLINES INC

Hex
AB5C12
Octal
52656022
Decimal
11,230,226
Country
US
Tail
N831AA
Type
B789
No current signal · last broadcast 6h ago
Flights observed
145
Distinct callsigns
20
Country
US
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S AB5C12.

Country allocation

The ICAO 24-bit address AB5C12 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
AAL127 - 23 2026-07-10
AAL128 - 19 2026-07-11
AAL963 - 9 2026-07-12
AAL123 American Airlines 8 2026-04-23
AAL962 - 7 2026-07-10
AAL168 - 7 2026-07-08
AAL167 - 7 2026-07-13
AAL116 American Airlines 7 2026-04-24
AAL293 - 5 2026-07-05
AAL951 - 4 2026-07-09
AAL5 American Airlines 4 2026-06-02
AAL170 - 4 2026-06-22
AAL169 - 4 2026-06-21
AAL102 American Airlines 4 2026-06-02
AAL950 - 3 2026-07-13
AAL292 - 3 2026-07-05
AAL27 - 3 2026-06-22
AAL9781 American Airlines 2 2026-06-04
AAL736P American Airlines 2 2026-06-28
AAL719 - 2 2026-06-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 AAL26 HND → LAX Jul 14, 11:05 UTCJul 14, 21:05 UTC10h 0m
2026-07-13 AAL167 JFK → HND Jul 13, 14:40 UTCJul 14, 03:50 UTC13h 10m
2026-07-13 AAL167 JFK → HND Jul 13, 14:36 UTCJul 14, 03:50 UTC13h 14m
2026-07-13 AAL950 - Jul 13, 01:55 UTCJul 13, 11:00 UTC9h 5m
2026-07-13 AAL950 GRU → JFK Jul 13, 01:51 UTCJul 13, 10:58 UTC9h 7m
2026-07-12 AAL963 - Jul 12, 11:35 UTCJul 12, 11:50 UTC15m
2026-07-12 AAL963 DFW → GRU Jul 12, 02:19 UTCJul 12, 11:16 UTC8h 57m
2026-07-12 AAL963 - Jul 12, 02:20 UTCJul 12, 05:25 UTC3h 5m
2026-07-11 AAL128 - Jul 11, 10:15 UTCJul 11, 12:05 UTC1h 50m
2026-07-11 AAL128 PVG → DFW Jul 11, 09:27 UTCJul 11, 22:45 UTC13h 18m
2026-07-11 AAL128 - Jul 11, 04:25 UTCJul 11, 22:50 UTC18h 25m
2026-07-10 AAL127 - Jul 10, 16:35 UTCJul 11, 12:05 UTC19h 31m
2026-07-10 AAL127 - Jul 10, 16:20 UTCJul 11, 06:20 UTC14h 0m
2026-07-10 AAL127 DFW → PVG Jul 10, 16:20 UTCJul 11, 07:14 UTC14h 54m
2026-07-10 AAL962 - Jul 10, 01:15 UTCJul 10, 11:15 UTC10h 0m
2026-07-09 AAL951 JFK → GRU Jul 9, 02:22 UTCJul 9, 11:00 UTC8h 38m
2026-07-09 AAL951 - Jul 9, 02:25 UTCJul 9, 11:00 UTC8h 35m
2026-07-08 AAL168 HND → JFK Jul 8, 08:59 UTCJul 8, 21:10 UTC12h 11m
2026-07-08 AAL168 HND → JFK Jul 8, 09:00 UTCJul 8, 21:10 UTC12h 10m
2026-07-07 AAL167 - Jul 7, 14:45 UTCJul 7, 22:45 UTC8h 0m
2026-07-07 AAL167 JFK → HND Jul 7, 14:45 UTCJul 8, 04:21 UTC13h 36m
2026-07-05 AAL293 DEL → JFK Jul 5, 18:10 UTCJul 6, 09:35 UTC15h 25m
2026-07-05 AAL292 JFK → DEL Jul 5, 02:25 UTCJul 5, 15:30 UTC13h 5m
2026-07-04 AAL168 PDX → CLT Jul 4, 09:12 UTCJul 4, 21:29 UTC12h 17m
2026-07-04 AAL168 PDX → CLT Jul 4, 09:15 UTCJul 4, 21:35 UTC12h 20m
2026-07-03 AAL167 - Jul 3, 15:00 UTCJul 4, 04:30 UTC13h 30m
2026-07-03 AAL167 JFK → HND Jul 3, 14:59 UTCJul 4, 05:17 UTC14h 18m
2026-07-02 AAL293 DEL → JFK Jul 2, 18:20 UTCJul 3, 09:45 UTC15h 25m
2026-07-02 AAL293 DEL → JFK Jul 2, 18:18 UTCJul 3, 09:40 UTC15h 22m
2026-07-02 AAL292 JFK → DEL Jul 2, 01:50 UTCJul 2, 15:05 UTC13h 15m
2026-07-01 AAL235 - Jul 1, 09:35 UTCJul 1, 17:55 UTC8h 20m
2026-07-01 AAL235 FCO → JFK Jul 1, 09:34 UTCJul 1, 17:56 UTC8h 22m
2026-06-30 AAL110 - Jun 30, 22:20 UTCJul 1, 06:45 UTC8h 25m
2026-06-30 AAL111 - Jun 30, 08:25 UTCJun 30, 17:50 UTC9h 25m
2026-06-30 AAL111 FCO → ORD Jun 30, 08:21 UTCJun 30, 17:44 UTC9h 23m
2026-06-29 AAL718 - Jun 29, 21:05 UTCJun 30, 04:35 UTC7h 31m
2026-06-29 AAL9601 - Jun 29, 10:29 UTCJun 29, 17:19 UTC6h 50m
2026-06-28 AAL736P PHL → LHR Jun 28, 00:09 UTCJun 28, 01:44 UTC1h 35m
2026-06-28 AAL736P PHL → LHR Jun 28, 00:09 UTCJun 28, 06:26 UTC6h 17m
2026-06-27 AAL279 DFW → SMF Jun 27, 11:14 UTCJun 27, 17:49 UTC6h 35m
2026-06-27 AAL278 PSQ → EDI Jun 27, 00:00 UTCJun 27, 06:09 UTC6h 10m
2026-06-26 AAL278 PHL → EDI Jun 26, 23:59 UTCJun 27, 06:04 UTC6h 5m
2026-06-26 AAL719 - Jun 26, 10:30 UTCJun 26, 19:00 UTC8h 30m
2026-06-26 AAL719 FCO → PHL Jun 26, 10:26 UTCJun 26, 18:56 UTC8h 30m
2026-06-26 AAL236 JFK → FCO Jun 26, 00:10 UTCJun 26, 07:25 UTC7h 15m
2026-06-26 AAL236 - Jun 26, 00:10 UTCJun 26, 07:30 UTC7h 20m
2026-06-24 AAL293 - Jun 24, 18:09 UTCJun 24, 22:29 UTC4h 20m
2026-06-24 AAL293 DEL → JFK Jun 24, 18:09 UTCJun 25, 09:26 UTC15h 17m
2026-06-24 AAL292 JFK → DEL Jun 24, 01:44 UTCJun 24, 14:55 UTC13h 10m
2026-06-23 AAL168 PDX → CLT Jun 23, 09:05 UTCJun 23, 21:14 UTC12h 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 N831AA page for operator, model, and routing details .

Mode-S AB5C12 frequently asked

What is Mode-S code AB5C12?
AB5C12 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N831AA.
Where is Mode-S AB5C12 registered?
Mode-S code AB5C12 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 AB5C12 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB5C12, octal 52656022, decimal 11,230,226.
What flights does AB5C12 operate?
Mode-S AB5C12 has broadcast 20 distinct callsigns, including AAL127, AAL128, AAL963, AAL123, AAL962.