Apparatus

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sensors Mode-S transponder

AB4AE9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N827AN · BOEING 787-9 Dreamliner · operated by AMERICAN AIRLINES INC

Hex
AB4AE9
Octal
52645351
Decimal
11,225,833
Country
US
Tail
N827AN
Type
B789
Broadcasting now · callsign AAL111 · 33,475 ft
Flights observed
250
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:30 UTC

Current position

AB4AE9 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AB4AE9 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
AAL27 American Airlines 17 2026-07-25
AAL169 American Airlines 13 2026-07-24
AAL26 American Airlines 12 2026-07-23
AAL718 - 11 2026-07-03
AAL110 American Airlines 11 2026-05-15
AAL719 - 10 2026-06-23
AAL170 American Airlines 10 2026-07-25
AAL111 American Airlines 10 2026-05-15
AAL259 American Airlines 9 2026-07-03
AAL236 - 9 2026-06-23
AAL128 American Airlines 9 2026-06-09
AAL951 - 8 2026-07-14
AAL747 American Airlines 8 2026-07-01
AAL293 - 8 2026-06-21
AAL280 - 8 2026-07-18
AAL258 - 8 2026-07-03
AAL235 - 8 2026-07-04
AAL281 - 7 2026-07-17
AAL167 American Airlines 7 2026-07-22
AAL746 American Airlines 6 2026-07-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL168 PDX → CLT Jul 26, 09:10 UTCJul 26, 21:20 UTC12h 10m
2026-07-25 AAL27 LAX → HND Jul 25, 19:45 UTCJul 25, 20:45 UTC1h 0m
2026-07-25 AAL27 LAX → HND Jul 25, 19:44 UTCJul 26, 06:21 UTC10h 37m
2026-07-25 AAL170 NRT → LAX Jul 25, 03:10 UTCJul 25, 13:05 UTC9h 55m
2026-07-24 AAL169 LAX → NRT Jul 24, 08:22 UTCJul 24, 18:31 UTC10h 9m
2026-07-24 AAL169 LAX → NRT Jul 24, 08:25 UTCJul 24, 18:35 UTC10h 10m
2026-07-23 AAL26 HND → LAX Jul 23, 11:15 UTCJul 23, 21:25 UTC10h 10m
2026-07-22 AAL167 JFK → HND Jul 22, 16:10 UTCJul 23, 05:20 UTC13h 10m
2026-07-21 AAL9600 JFK → MIA Jul 21, 04:00 UTCJul 21, 16:15 UTC12h 15m
2026-07-19 AAL27 LAX → HND Jul 19, 19:40 UTCJul 20, 06:15 UTC10h 35m
2026-07-19 AAL9789 - Jul 19, 14:10 UTCJul 19, 16:30 UTC2h 20m
2026-07-18 AAL280 - Jul 18, 18:40 UTCJul 18, 21:45 UTC3h 5m
2026-07-18 AAL280 - Jul 18, 09:10 UTCJul 18, 18:35 UTC9h 25m
2026-07-18 AAL280 ICN → DFW Jul 18, 09:07 UTCJul 18, 21:41 UTC12h 34m
2026-07-17 AAL281 DFW → ICN Jul 17, 16:40 UTCJul 18, 05:30 UTC12h 51m
2026-07-17 AAL281 DFW → ICN Jul 17, 16:34 UTCJul 18, 05:31 UTC12h 57m
2026-07-15 AAL962 - Jul 15, 02:55 UTCJul 15, 12:35 UTC9h 40m
2026-07-14 AAL951 - Jul 14, 01:15 UTCJul 14, 05:30 UTC4h 15m
2026-07-14 AAL951 JFK → GRU Jul 14, 01:15 UTCJul 14, 09:49 UTC8h 34m
2026-07-13 AAL168 HND → JFK Jul 13, 10:20 UTCJul 13, 22:05 UTC11h 45m
2026-07-12 AAL27 - Jul 12, 19:50 UTCJul 12, 20:50 UTC1h 0m
2026-07-12 AAL27 LAX → HND Jul 12, 19:49 UTCJul 13, 06:23 UTC10h 34m
2026-07-12 AAL170 HND → LAX Jul 12, 03:15 UTCJul 12, 13:27 UTC10h 12m
2026-07-12 AAL170 - Jul 12, 03:15 UTCJul 12, 13:15 UTC10h 0m
2026-07-11 AAL169 - Jul 11, 08:30 UTCJul 11, 09:30 UTC1h 0m
2026-07-11 AAL169 LAX → HND Jul 11, 08:30 UTCJul 11, 19:04 UTC10h 34m
2026-07-10 AAL26 - Jul 10, 10:55 UTCJul 10, 11:35 UTC40m
2026-07-10 AAL26 HND → LAX Jul 10, 10:53 UTCJul 10, 20:54 UTC10h 1m
2026-07-09 AAL27 - Jul 9, 19:45 UTCJul 10, 06:30 UTC10h 45m
2026-07-09 AAL27 LAX → HND Jul 9, 19:42 UTCJul 10, 06:32 UTC10h 50m
2026-07-09 AAL170 HND → LAX Jul 9, 03:05 UTCJul 9, 12:25 UTC9h 20m
2026-07-08 AAL169 - Jul 8, 09:45 UTCJul 8, 20:15 UTC10h 30m
2026-07-08 AAL169 LAX → HND Jul 8, 09:43 UTCJul 8, 20:32 UTC10h 49m
2026-07-07 AAL26 HND → LAX Jul 7, 11:10 UTCJul 7, 20:47 UTC9h 37m
2026-07-07 AAL26 HND → LAX Jul 7, 11:10 UTCJul 7, 20:43 UTC9h 33m
2026-07-07 AAL26 HND → LAX Jul 7, 11:10 UTCJul 7, 20:45 UTC9h 35m
2026-07-06 AAL167 JFK → HND Jul 6, 14:55 UTCJul 7, 03:50 UTC12h 55m
2026-07-06 AAL167 JFK → HND Jul 6, 14:50 UTCJul 7, 03:53 UTC13h 3m
2026-07-06 AAL950 - Jul 6, 01:50 UTCJul 6, 10:35 UTC8h 45m
2026-07-06 AAL950 GRU → JFK Jul 6, 01:48 UTCJul 6, 10:29 UTC8h 41m
2026-07-05 AAL951 - Jul 5, 01:00 UTCJul 5, 05:25 UTC4h 25m
2026-07-05 AAL951 JFK → GRU Jul 5, 00:59 UTCJul 5, 09:47 UTC8h 48m
2026-07-04 AAL235 - Jul 4, 09:30 UTCJul 4, 10:15 UTC45m
2026-07-04 AAL235 FCO → JFK Jul 4, 09:26 UTCJul 4, 18:05 UTC8h 39m
2026-07-03 AAL718 - Jul 3, 21:15 UTCJul 4, 04:40 UTC7h 25m
2026-07-03 AAL718 PHL → FCO Jul 3, 21:12 UTCJul 4, 04:40 UTC7h 28m
2026-07-03 AAL259 LIS → PHL Jul 3, 10:20 UTCJul 3, 21:10 UTC10h 50m
2026-07-03 AAL258 - Jul 3, 01:40 UTCJul 3, 08:05 UTC6h 25m
2026-07-02 AAL797 - Jul 2, 20:40 UTCJul 2, 22:45 UTC2h 5m
2026-07-02 AAL796 - Jul 2, 14:25 UTCJul 2, 16:45 UTC2h 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 N827AN page for operator, model, and routing details .

Mode-S AB4AE9 frequently asked

What is Mode-S code AB4AE9?
AB4AE9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N827AN.
Where is Mode-S AB4AE9 registered?
Mode-S code AB4AE9 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 AB4AE9 broadcasting right now?
Yes. Mode-S AB4AE9 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB4AE9, octal 52645351, decimal 11,225,833.
What flights does AB4AE9 operate?
Mode-S AB4AE9 has broadcast 20 distinct callsigns, including AAL27, AAL169, AAL26, AAL718, AAL110.