Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 Jul 26, 18:10 UTC
Flights observed
176
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 18:10 UTC

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
AAL168 - 8 2026-07-17
AAL123 American Airlines 8 2026-04-23
AAL962 - 7 2026-07-10
AAL293 American Airlines 7 2026-07-18
AAL167 - 7 2026-07-13
AAL116 American Airlines 7 2026-04-24
AAL27 - 5 2026-07-16
AAL170 - 5 2026-07-16
AAL169 - 5 2026-07-15
AAL111 American Airlines 5 2026-07-23
AAL110 American Airlines 5 2026-07-24
AAL951 - 4 2026-07-09
AAL719 American Airlines 4 2026-07-24
AAL5 American Airlines 4 2026-06-02
AAL292 American Airlines 4 2026-07-18
AAL278 American Airlines 4 2026-07-26
AAL102 American Airlines 4 2026-06-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL279 DFW → SMF Jul 26, 11:00 UTCJul 26, 18:00 UTC7h 0m
2026-07-26 AAL279 DFW → SMF Jul 26, 10:57 UTCJul 26, 18:00 UTC7h 3m
2026-07-26 AAL278 DFW → PHL Jul 26, 00:25 UTCJul 26, 06:32 UTC6h 7m
2026-07-26 AAL278 DFW → PHL Jul 26, 00:30 UTCJul 26, 06:30 UTC6h 0m
2026-07-25 AAL755 CDG → PHL Jul 25, 12:30 UTCJul 25, 19:50 UTC7h 20m
2026-07-25 AAL755 CDG → PHL Jul 25, 12:26 UTCJul 25, 19:49 UTC7h 23m
2026-07-25 AAL754 PHL → CDG Jul 25, 02:20 UTCJul 25, 09:00 UTC6h 40m
2026-07-25 AAL754 PHL → CDG Jul 25, 02:15 UTCJul 25, 08:56 UTC6h 41m
2026-07-24 AAL719 FCO → PHL Jul 24, 12:15 UTCJul 24, 20:40 UTC8h 25m
2026-07-24 AAL110 ORD → FCO Jul 24, 07:10 UTCJul 24, 08:50 UTC1h 40m
2026-07-24 AAL110 ORD → FCO Jul 24, 00:25 UTCJul 24, 07:05 UTC6h 40m
2026-07-24 AAL110 ORD → FCO Jul 24, 00:22 UTCJul 24, 08:49 UTC8h 27m
2026-07-23 AAL111 FCO → ORD Jul 23, 10:55 UTCJul 23, 20:30 UTC9h 35m
2026-07-23 AAL111 FCO → ORD Jul 23, 10:53 UTCJul 23, 20:31 UTC9h 38m
2026-07-22 AAL110 ORD → FCO Jul 22, 23:55 UTCJul 23, 08:20 UTC8h 25m
2026-07-22 AAL111 FCO → ORD Jul 22, 12:25 UTCJul 22, 20:10 UTC7h 45m
2026-07-21 AAL718 PHL → FCO Jul 21, 23:55 UTCJul 22, 12:20 UTC12h 25m
2026-07-21 AAL259 LIS → PHL Jul 21, 10:15 UTCJul 21, 16:55 UTC6h 40m
2026-07-21 AAL259 LIS → PHL Jul 21, 10:11 UTCJul 21, 16:50 UTC6h 39m
2026-07-21 AAL258 PHL → LIS Jul 21, 01:57 UTCJul 21, 08:20 UTC6h 23m
2026-07-21 AAL258 PHL → LIS Jul 21, 02:00 UTCJul 21, 08:15 UTC6h 15m
2026-07-20 AAL719 FCO → PHL Jul 20, 14:15 UTCJul 20, 22:55 UTC8h 40m
2026-07-20 AAL236 JFK → FCO Jul 20, 03:25 UTCJul 20, 11:30 UTC8h 5m
2026-07-18 AAL293 DEL → JFK Jul 18, 18:50 UTCJul 19, 09:55 UTC15h 5m
2026-07-18 AAL293 DEL → JFK Jul 18, 18:48 UTCJul 19, 09:50 UTC15h 2m
2026-07-18 AAL292 JFK → DEL Jul 18, 01:30 UTCJul 18, 15:10 UTC13h 41m
2026-07-17 AAL168 HND → JFK Jul 17, 09:20 UTCJul 17, 21:39 UTC12h 20m
2026-07-16 AAL27 - Jul 16, 19:55 UTCJul 16, 21:10 UTC1h 15m
2026-07-16 AAL27 LAX → HND Jul 16, 19:50 UTCJul 17, 06:18 UTC10h 28m
2026-07-16 AAL170 HND → LAX Jul 16, 03:15 UTCJul 16, 12:55 UTC9h 40m
2026-07-15 AAL169 - Jul 15, 08:25 UTCJul 15, 18:35 UTC10h 10m
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

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 Jul 26, 18:10 UTC.
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, AAL168, AAL123.