Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 AAL951 · 37,000 ft
Flights observed
232
Distinct callsigns
20
Country
US
Last broadcast
3h ago

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 - 14 2026-07-12
AAL718 - 11 2026-07-03
AAL26 - 11 2026-07-10
AAL169 - 11 2026-07-11
AAL110 American Airlines 11 2026-05-15
AAL719 - 10 2026-06-23
AAL111 American Airlines 10 2026-05-15
AAL259 American Airlines 9 2026-07-03
AAL236 - 9 2026-06-23
AAL170 - 9 2026-07-12
AAL128 American Airlines 9 2026-06-09
AAL747 American Airlines 8 2026-07-01
AAL293 - 8 2026-06-21
AAL258 - 8 2026-07-03
AAL235 - 8 2026-07-04
AAL951 - 7 2026-07-14
AAL746 American Airlines 6 2026-07-01
AAL167 - 6 2026-07-06
AAL281 American Airlines 5 2026-06-11
AAL280 American Airlines 5 2026-06-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 AAL951 - Jul 14, 01:15 UTCJul 14, 01:50 UTC35m
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
2026-07-01 AAL747 BOS → MIA Jul 1, 11:05 UTCJul 1, 19:31 UTC8h 26m
2026-07-01 AAL746 CLT → JAX Jul 1, 00:55 UTCJul 1, 08:00 UTC7h 5m
2026-06-30 AAL747 BOS → MIA Jun 30, 08:35 UTCJun 30, 16:40 UTC8h 5m
2026-06-29 AAL746 CLT → JAX Jun 29, 23:14 UTCJun 30, 06:15 UTC7h 1m
2026-06-29 AAL746 CLT → JAX Jun 29, 23:11 UTCJun 30, 06:07 UTC6h 56m
2026-06-29 AAL279 DFW → SMF Jun 29, 10:40 UTCJun 29, 17:10 UTC6h 30m
2026-06-29 AAL278 - Jun 29, 00:14 UTCJun 29, 06:14 UTC6h 0m
2026-06-29 AAL278 PHL → EDI Jun 29, 00:12 UTCJun 29, 06:11 UTC5h 59m
2026-06-28 AAL747 BOS → MIA Jun 28, 08:34 UTCJun 28, 10:15 UTC1h 40m
2026-06-28 AAL747 BOS → MIA Jun 28, 08:34 UTCJun 28, 16:54 UTC8h 20m
2026-06-28 AAL747 BOS → MIA Jun 28, 08:34 UTCJun 28, 16:39 UTC8h 5m
2026-06-27 AAL746 CLT → JAX Jun 27, 23:00 UTCJun 28, 06:11 UTC7h 11m
2026-06-27 AAL746 CLT → JAX Jun 27, 23:04 UTCJun 28, 06:10 UTC7h 5m
2026-06-27 AAL259 LIS → PHL Jun 27, 10:19 UTCJun 27, 17:29 UTC7h 10m
2026-06-27 AAL258 - Jun 27, 02:25 UTCJun 27, 08:10 UTC5h 45m
2026-06-26 AAL2667 DFW → PIT Jun 26, 19:20 UTCJun 26, 21:35 UTC2h 15m
2026-06-26 AAL2667 DFW → PIT Jun 26, 19:18 UTCJun 26, 21:35 UTC2h 17m
2026-06-26 AAL2667 DFW → PIT Jun 26, 14:55 UTCJun 26, 17:09 UTC2h 15m

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, AAL718, AAL26, AAL169, AAL110.