Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AABBC9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N791AN · BOEING 777-200 · operated by AMERICAN AIRLINES INC

Hex
AABBC9
Octal
52535711
Decimal
11,189,193
Country
US
Tail
N791AN
Type
B772
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
232
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S AABBC9.

Country allocation

The ICAO 24-bit address AABBC9 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
AAL721 - 13 2026-07-13
AAL733 - 12 2026-07-19
AAL52 - 9 2026-07-12
AAL281 American Airlines 9 2026-04-21
AAL108 - 9 2026-07-19
AAL787 American Airlines 8 2026-07-24
AAL109 American Airlines 8 2026-07-18
AAL239 American Airlines 7 2026-05-29
AAL748 American Airlines 6 2026-07-24
AAL198 American Airlines 6 2026-07-25
AAL95 American Airlines 5 2026-07-25
AAL904 American Airlines 5 2026-05-14
AAL900 - 5 2026-07-11
AAL786 - 5 2026-06-20
AAL57 American Airlines 5 2026-05-17
AAL48 American Airlines 5 2026-06-12
AAL195 - 5 2026-07-14
AAL9600 American Airlines 4 2026-05-08
AAL931 - 4 2026-06-25
AAL732 - 4 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL94 JFK → MAD Jul 26, 20:50 UTCJul 26, 22:15 UTC1h 25m
2026-07-26 AAL199 MXP → JFK Jul 26, 09:21 UTCJul 26, 17:24 UTC8h 3m
2026-07-26 AAL199 MXP → JFK Jul 26, 09:20 UTCJul 26, 17:25 UTC8h 5m
2026-07-25 AAL198 JFK → MXP Jul 25, 23:29 UTCJul 26, 06:53 UTC7h 24m
2026-07-25 AAL198 JFK → MXP Jul 25, 23:30 UTCJul 26, 01:05 UTC1h 35m
2026-07-25 AAL95 MAD → JFK Jul 25, 08:35 UTCJul 25, 15:40 UTC7h 5m
2026-07-24 AAL748 CLT → MAD Jul 24, 20:00 UTCJul 25, 03:40 UTC7h 40m
2026-07-24 AAL787 CDG → CLT Jul 24, 09:20 UTCJul 24, 17:35 UTC8h 15m
2026-07-24 AAL787 CDG → CLT Jul 24, 09:16 UTCJul 24, 17:34 UTC8h 18m
2026-07-23 AAL42 ORD → LIR Jul 23, 22:30 UTCJul 24, 04:50 UTC6h 20m
2026-07-23 AAL199 MXP → JFK Jul 23, 11:40 UTCJul 23, 19:35 UTC7h 55m
2026-07-23 AAL198 JFK → MXP Jul 23, 01:45 UTCJul 23, 09:05 UTC7h 20m
2026-07-22 AAL199 MXP → JFK Jul 22, 13:05 UTCJul 22, 21:30 UTC8h 25m
2026-07-22 AAL198 JFK → MXP Jul 22, 11:10 UTCJul 22, 11:25 UTC15m
2026-07-22 AAL198 JFK → MXP Jul 22, 03:10 UTCJul 22, 10:53 UTC7h 43m
2026-07-22 AAL198 JFK → MXP Jul 22, 03:15 UTCJul 22, 11:25 UTC8h 10m
2026-07-21 AAL333 ATH → JFK Jul 21, 23:35 UTCJul 21, 23:40 UTC5m
2026-07-21 AAL333 ATH → JFK Jul 21, 13:30 UTCJul 21, 17:40 UTC4h 10m
2026-07-21 AAL333 ATH → JFK Jul 21, 13:28 UTCJul 21, 23:20 UTC9h 52m
2026-07-20 AAL326 PHL → CHS Jul 20, 23:00 UTCJul 21, 08:50 UTC9h 50m
2026-07-19 AAL733 - Jul 19, 11:20 UTCJul 19, 19:40 UTC8h 20m
2026-07-19 AAL108 BOS → LHR Jul 19, 01:25 UTCJul 19, 07:20 UTC5h 55m
2026-07-18 AAL109 LHR → BOS Jul 18, 09:40 UTCJul 18, 16:05 UTC6h 25m
2026-07-18 AAL108 BOS → LHR Jul 18, 00:25 UTCJul 18, 06:50 UTC6h 26m
2026-07-17 AAL109 LHR → BOS Jul 17, 09:30 UTCJul 17, 16:10 UTC6h 40m
2026-07-17 AAL108 BOS → LHR Jul 17, 01:05 UTCJul 17, 07:14 UTC6h 10m
2026-07-16 AAL109 - Jul 16, 09:45 UTCJul 16, 16:19 UTC6h 35m
2026-07-16 AAL174 - Jul 16, 00:00 UTCJul 16, 07:25 UTC7h 25m
2026-07-15 AAL173 - Jul 15, 12:45 UTCJul 15, 20:20 UTC7h 35m
2026-07-15 AAL194 PHX → LHR Jul 15, 00:45 UTCJul 15, 10:35 UTC9h 50m
2026-07-14 AAL195 - Jul 14, 10:40 UTCJul 14, 11:50 UTC1h 10m
2026-07-14 AAL195 LHR → PHX Jul 14, 10:36 UTCJul 14, 20:49 UTC10h 13m
2026-07-14 AAL195 LHR → PHX Jul 14, 10:36 UTCJul 14, 20:48 UTC10h 12m
2026-07-14 AAL732 - Jul 14, 00:20 UTCJul 14, 07:50 UTC7h 30m
2026-07-14 AAL732 CLT → LHR Jul 14, 00:18 UTCJul 14, 07:38 UTC7h 20m
2026-07-13 AAL721 - Jul 13, 12:30 UTCJul 13, 22:00 UTC9h 30m
2026-07-13 AAL721 FCO → CLT Jul 13, 12:26 UTCJul 13, 21:54 UTC9h 28m
2026-07-12 AAL52 - Jul 12, 23:55 UTCJul 13, 00:20 UTC25m
2026-07-12 AAL52 MIA → FCO Jul 12, 23:53 UTCJul 13, 09:41 UTC9h 48m
2026-07-11 AAL900 - Jul 11, 23:35 UTCJul 12, 00:15 UTC40m
2026-07-11 AAL900 EZE → MIA Jul 11, 23:35 UTCJul 12, 08:05 UTC8h 30m
2026-07-11 AAL907 - Jul 11, 05:10 UTCJul 11, 05:35 UTC25m
2026-07-11 AAL907 MIA → EZE Jul 11, 05:10 UTCJul 11, 13:25 UTC8h 15m
2026-07-10 AAL488 - Jul 10, 23:05 UTCJul 11, 00:35 UTC1h 30m
2026-07-08 AAL733 - Jul 8, 11:15 UTCJul 8, 12:30 UTC1h 15m
2026-07-08 AAL733 LHR → CLT Jul 8, 11:13 UTCJul 8, 19:05 UTC7h 52m
2026-07-08 AAL733 LHR → CLT Jul 8, 11:13 UTCJul 8, 19:00 UTC7h 47m
2026-07-08 AAL108 - Jul 8, 00:30 UTCJul 8, 06:40 UTC6h 10m
2026-07-07 AAL109 - Jul 7, 09:20 UTCJul 7, 15:50 UTC6h 30m
2026-07-07 AAL109 LHR → BOS Jul 7, 09:16 UTCJul 7, 15:50 UTC6h 34m

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 N791AN page for operator, model, and routing details .

Mode-S AABBC9 frequently asked

What is Mode-S code AABBC9?
AABBC9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N791AN.
Where is Mode-S AABBC9 registered?
Mode-S code AABBC9 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 AABBC9 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AABBC9, octal 52535711, decimal 11,189,193.
What flights does AABBC9 operate?
Mode-S AABBC9 has broadcast 20 distinct callsigns, including AAL721, AAL733, AAL52, AAL281, AAL108.