Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AB5257

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N829AN · BOEING 787-9 Dreamliner · operated by AMERICAN AIRLINES INC

Hex
AB5257
Octal
52651127
Decimal
11,227,735
Country
US
Tail
N829AN
Type
B789
No current signal · last broadcast Jul 26, 18:35 UTC
Flights observed
249
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 18:35 UTC

Last known position

Most recent position reported by Mode-S AB5257.

Country allocation

The ICAO 24-bit address AB5257 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
AAL293 - 15 2026-07-06
AAL292 - 15 2026-07-06
AAL168 - 15 2026-07-12
AAL719 American Airlines 13 2026-07-23
AAL718 American Airlines 13 2026-07-24
AAL259 American Airlines 13 2026-07-22
AAL236 American Airlines 13 2026-07-19
AAL235 American Airlines 13 2026-07-26
AAL111 American Airlines 12 2026-07-25
AAL950 - 11 2026-07-11
AAL258 American Airlines 10 2026-07-22
AAL110 American Airlines 10 2026-07-25
AAL167 - 9 2026-07-11
AAL26 American Airlines 8 2026-07-02
AAL951 - 7 2026-06-30
AAL279 American Airlines 6 2026-07-24
AAL278 American Airlines 6 2026-07-24
AAL203 American Airlines 6 2026-04-24
AAL170 - 6 2026-07-04
AAL169 - 6 2026-07-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL235 FCO → JFK Jul 26, 10:05 UTCJul 26, 18:25 UTC8h 20m
2026-07-25 AAL110 ORD → FCO Jul 25, 23:10 UTCJul 26, 07:35 UTC8h 26m
2026-07-25 AAL111 FCO → ORD Jul 25, 17:10 UTCJul 25, 18:15 UTC1h 5m
2026-07-25 AAL111 FCO → ORD Jul 25, 08:50 UTCJul 25, 17:05 UTC8h 15m
2026-07-25 AAL111 FCO → ORD Jul 25, 08:46 UTCJul 25, 18:10 UTC9h 24m
2026-07-24 AAL718 PHL → FCO Jul 24, 21:01 UTCJul 25, 05:14 UTC8h 13m
2026-07-24 AAL718 PHL → FCO Jul 24, 21:05 UTCJul 25, 05:10 UTC8h 5m
2026-07-24 AAL279 DFW → SMF Jul 24, 11:05 UTCJul 24, 18:10 UTC7h 5m
2026-07-24 AAL278 DFW → PHL Jul 24, 00:05 UTCJul 24, 05:50 UTC5h 45m
2026-07-23 AAL719 FCO → PHL Jul 23, 11:25 UTCJul 23, 19:55 UTC8h 30m
2026-07-23 AAL719 FCO → PHL Jul 23, 11:24 UTCJul 23, 19:59 UTC8h 35m
2026-07-22 AAL718 PHL → FCO Jul 22, 21:05 UTCJul 23, 04:55 UTC7h 50m
2026-07-22 AAL718 PHL → FCO Jul 22, 21:03 UTCJul 23, 05:00 UTC7h 57m
2026-07-22 AAL259 LIS → PHL Jul 22, 11:10 UTCJul 22, 17:20 UTC6h 10m
2026-07-22 AAL258 PHL → LIS Jul 22, 01:50 UTCJul 22, 03:20 UTC1h 30m
2026-07-21 AAL279 EDI → PHL Jul 21, 10:45 UTCJul 21, 17:35 UTC6h 50m
2026-07-20 AAL278 DFW → PHL Jul 20, 23:50 UTCJul 21, 05:45 UTC5h 55m
2026-07-20 AAL278 DFW → PHL Jul 20, 23:49 UTCJul 21, 05:51 UTC6h 2m
2026-07-20 AAL259 LIS → PHL Jul 20, 11:09 UTCJul 20, 18:09 UTC7h 0m
2026-07-20 AAL259 LIS → PHL Jul 20, 11:09 UTCJul 20, 18:05 UTC6h 56m
2026-07-20 AAL259 LIS → PHL Jul 20, 11:10 UTCJul 20, 11:55 UTC45m
2026-07-20 AAL258 PHL → LIS Jul 20, 02:40 UTCJul 20, 08:35 UTC5h 55m
2026-07-19 AAL719 PHL → PHL Jul 19, 22:15 UTCJul 19, 22:35 UTC20m
2026-07-19 AAL719 PHL → PHL Jul 19, 22:00 UTCJul 19, 22:10 UTC10m
2026-07-19 AAL719 - Jul 19, 13:05 UTCJul 19, 21:50 UTC8h 45m
2026-07-19 AAL236 JFK → FCO Jul 19, 03:13 UTCJul 19, 11:04 UTC7h 51m
2026-07-19 AAL236 JFK → FCO Jul 19, 03:15 UTCJul 19, 04:15 UTC1h 0m
2026-07-18 AAL235 - Jul 18, 18:45 UTCJul 18, 18:50 UTC5m
2026-07-18 AAL235 - Jul 18, 10:10 UTCJul 18, 11:45 UTC1h 35m
2026-07-18 AAL235 FCO → JFK Jul 18, 10:05 UTCJul 18, 18:30 UTC8h 25m
2026-07-17 AAL110 ORD → FCO Jul 17, 22:45 UTCJul 18, 01:25 UTC2h 40m
2026-07-17 AAL110 ORD → FCO Jul 17, 22:44 UTCJul 18, 07:32 UTC8h 48m
2026-07-17 AAL111 - Jul 17, 08:35 UTCJul 17, 17:44 UTC9h 10m
2026-07-17 AAL111 FCO → ORD Jul 17, 08:30 UTCJul 17, 17:53 UTC9h 23m
2026-07-16 AAL718 - Jul 16, 22:10 UTCJul 16, 23:35 UTC1h 25m
2026-07-16 AAL718 PHL → FCO Jul 16, 22:07 UTCJul 17, 06:04 UTC7h 57m
2026-07-16 AAL718 PHL → PHL Jul 16, 20:55 UTCJul 16, 21:10 UTC15m
2026-07-16 AAL259 - Jul 16, 10:20 UTCJul 16, 17:30 UTC7h 10m
2026-07-16 AAL258 PHL → LIS Jul 16, 01:25 UTCJul 16, 07:45 UTC6h 20m
2026-07-16 AAL258 PHL → LIS Jul 16, 01:21 UTCJul 16, 07:46 UTC6h 25m
2026-07-15 AAL797 - Jul 15, 19:10 UTCJul 15, 21:25 UTC2h 15m
2026-07-15 AAL797 MIA → PHL Jul 15, 19:06 UTCJul 15, 21:22 UTC2h 16m
2026-07-15 AAL796 PHL → MIA Jul 15, 14:15 UTCJul 15, 16:20 UTC2h 5m
2026-07-14 AAL755 - Jul 14, 12:20 UTCJul 14, 19:30 UTC7h 10m
2026-07-14 AAL754 PHL → CDG Jul 14, 02:20 UTCJul 14, 09:05 UTC6h 45m
2026-07-13 AAL719 - Jul 13, 10:40 UTCJul 13, 19:15 UTC8h 35m
2026-07-13 AAL236 - Jul 13, 00:05 UTCJul 13, 01:40 UTC1h 35m
2026-07-13 AAL236 JFK → FCO Jul 13, 00:01 UTCJul 13, 07:39 UTC7h 38m
2026-07-12 AAL168 HND → JFK Jul 12, 09:15 UTCJul 12, 21:35 UTC12h 20m
2026-07-11 AAL167 JFK → HND Jul 11, 14:45 UTCJul 12, 03:55 UTC13h 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 N829AN page for operator, model, and routing details .

Mode-S AB5257 frequently asked

What is Mode-S code AB5257?
AB5257 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N829AN.
Where is Mode-S AB5257 registered?
Mode-S code AB5257 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 AB5257 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 18:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB5257, octal 52651127, decimal 11,227,735.
What flights does AB5257 operate?
Mode-S AB5257 has broadcast 20 distinct callsigns, including AAL293, AAL292, AAL168, AAL719, AAL718.