Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A9BD9A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N727AN · BOEING 777-300ER · operated by AMERICAN AIRLINES INC

Hex
A9BD9A
Octal
52336632
Decimal
11,124,122
Country
US
Tail
N727AN
Type
B77W
No current signal · last broadcast Jul 26, 19:15 UTC
Flights observed
237
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:15 UTC

Last known position

Most recent position reported by Mode-S A9BD9A.

Country allocation

The ICAO 24-bit address A9BD9A 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
AAL731 - 18 2026-07-14
AAL51 American Airlines 16 2026-07-18
AAL142 - 15 2026-07-17
AAL20 - 14 2026-07-08
AAL175 American Airlines 14 2026-07-25
AAL216 American Airlines 13 2026-07-21
AAL176 American Airlines 13 2026-07-26
AAL141 - 13 2026-07-01
AAL78 American Airlines 12 2026-07-24
AAL730 - 11 2026-07-13
AAL217 American Airlines 11 2026-07-22
AAL81 American Airlines 10 2026-07-24
AAL954 - 9 2026-07-17
AAL80 - 9 2026-06-22
AAL953 - 8 2026-07-16
AAL929 - 5 2026-07-09
AAL39 - 5 2026-07-11
AAL38 - 5 2026-07-11
AAL930 - 4 2026-07-10
AAL735 American Airlines 4 2026-05-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL176 NRT → DFW Jul 26, 08:15 UTCJul 26, 19:15 UTC11h 0m
2026-07-25 AAL175 DFW → HND Jul 25, 16:30 UTCJul 26, 05:50 UTC13h 20m
2026-07-24 AAL81 LHR → DFW Jul 24, 16:00 UTCJul 25, 01:30 UTC9h 30m
2026-07-24 AAL78 DFW → LHR Jul 24, 04:27 UTCJul 24, 13:01 UTC8h 34m
2026-07-24 AAL78 DFW → LHR Jul 24, 04:30 UTCJul 24, 13:00 UTC8h 30m
2026-07-23 AAL81 LHR → DFW Jul 23, 16:20 UTCJul 24, 01:35 UTC9h 15m
2026-07-23 AAL78 DFW → LHR Jul 23, 04:35 UTCJul 23, 13:10 UTC8h 35m
2026-07-22 AAL217 CLT → AUS Jul 22, 12:30 UTCJul 23, 00:55 UTC12h 25m
2026-07-21 AAL216 SFO → DFW Jul 21, 22:25 UTCJul 22, 02:10 UTC3h 45m
2026-07-21 AAL176 HND → DFW Jul 21, 08:10 UTCJul 21, 19:30 UTC11h 20m
2026-07-20 AAL175 DFW → HND Jul 20, 16:35 UTCJul 21, 05:15 UTC12h 39m
2026-07-19 AAL217 CLT → AUS Jul 19, 11:25 UTCJul 20, 00:10 UTC12h 45m
2026-07-18 AAL216 SFO → DFW Jul 18, 21:15 UTCJul 19, 08:25 UTC11h 10m
2026-07-18 AAL51 LHR → DFW Jul 18, 08:10 UTCJul 18, 17:05 UTC8h 55m
2026-07-17 AAL142 - Jul 17, 14:15 UTCJul 17, 15:49 UTC1h 35m
2026-07-17 AAL142 JFK → LHR Jul 17, 14:14 UTCJul 17, 20:38 UTC6h 24m
2026-07-17 AAL954 - Jul 17, 00:14 UTCJul 17, 09:55 UTC9h 40m
2026-07-16 AAL953 JFK → EZE Jul 16, 04:00 UTCJul 16, 13:40 UTC9h 40m
2026-07-15 AAL9785 - Jul 15, 06:30 UTCJul 15, 07:50 UTC1h 20m
2026-07-14 AAL731 - Jul 14, 09:05 UTCJul 14, 16:40 UTC7h 35m
2026-07-13 AAL730 - Jul 13, 22:55 UTCJul 14, 06:30 UTC7h 35m
2026-07-13 AAL731 - Jul 13, 08:50 UTCJul 13, 16:40 UTC7h 50m
2026-07-12 AAL730 - Jul 12, 22:35 UTCJul 13, 05:55 UTC7h 20m
2026-07-12 AAL731 LHR → CLT Jul 12, 10:57 UTCJul 12, 18:33 UTC7h 36m
2026-07-12 AAL731 - Jul 12, 11:01 UTCJul 12, 12:10 UTC1h 10m
2026-07-11 AAL38 - Jul 11, 23:55 UTCJul 12, 06:30 UTC6h 35m
2026-07-11 AAL38 MIA → LHR Jul 11, 23:52 UTCJul 12, 07:48 UTC7h 56m
2026-07-11 AAL39 LHR → MIA Jul 11, 11:37 UTCJul 11, 20:02 UTC8h 25m
2026-07-11 AAL39 LHR → MIA Jul 11, 11:40 UTCJul 11, 20:05 UTC8h 25m
2026-07-11 AAL38 - Jul 11, 00:05 UTCJul 11, 08:25 UTC8h 20m
2026-07-11 AAL38 MIA → LHR Jul 11, 00:02 UTCJul 11, 08:12 UTC8h 10m
2026-07-10 AAL930 - Jul 10, 00:30 UTCJul 10, 08:25 UTC7h 55m
2026-07-10 AAL930 GRU → MIA Jul 10, 00:28 UTCJul 10, 08:31 UTC8h 3m
2026-07-09 AAL929 - Jul 9, 00:55 UTCJul 9, 06:30 UTC5h 35m
2026-07-09 AAL929 MIA → GRU Jul 9, 00:51 UTCJul 9, 08:10 UTC7h 19m
2026-07-08 AAL39 - Jul 8, 11:35 UTCJul 8, 20:25 UTC8h 50m
2026-07-08 AAL20 - Jul 8, 07:35 UTCJul 8, 08:30 UTC55m
2026-07-07 AAL20 - Jul 7, 23:15 UTCJul 8, 07:30 UTC8h 15m
2026-07-07 AAL20 DFW → LHR Jul 7, 23:14 UTCJul 8, 08:08 UTC8h 54m
2026-07-07 AAL176 NRT → DFW Jul 7, 07:52 UTCJul 7, 18:50 UTC10h 58m
2026-07-07 AAL176 NRT → DFW Jul 7, 07:55 UTCJul 7, 18:50 UTC10h 55m
2026-07-06 AAL175 DFW → HND Jul 6, 16:25 UTCJul 7, 04:45 UTC12h 20m
2026-07-05 AAL217 ATH → DFW Jul 5, 11:31 UTCJul 5, 23:42 UTC12h 11m
2026-07-05 AAL217 ATH → DFW Jul 5, 11:35 UTCJul 5, 23:45 UTC12h 10m
2026-07-04 AAL216 - Jul 4, 21:25 UTCJul 5, 08:25 UTC11h 0m
2026-07-04 AAL216 DFW → ATH Jul 4, 21:22 UTCJul 5, 08:24 UTC11h 2m
2026-07-04 AAL51 LHR → DFW Jul 4, 08:35 UTCJul 4, 17:50 UTC9h 15m
2026-07-03 AAL730 - Jul 3, 22:20 UTCJul 4, 05:35 UTC7h 15m
2026-07-03 AAL731 LHR → CLT Jul 3, 08:35 UTCJul 3, 16:30 UTC7h 55m
2026-07-03 AAL731 LHR → CLT Jul 3, 08:35 UTCJul 3, 16:30 UTC7h 55m

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 N727AN page for operator, model, and routing details .

Mode-S A9BD9A frequently asked

What is Mode-S code A9BD9A?
A9BD9A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N727AN.
Where is Mode-S A9BD9A registered?
Mode-S code A9BD9A 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 A9BD9A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9BD9A, octal 52336632, decimal 11,124,122.
What flights does A9BD9A operate?
Mode-S A9BD9A has broadcast 20 distinct callsigns, including AAL731, AAL51, AAL142, AAL20, AAL175.