Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AC9FF2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N912UY · AIRBUS A-321 · operated by AMERICAN AIRLINES INC

Hex
AC9FF2
Octal
53117762
Decimal
11,313,138
Country
US
Tail
N912UY
Type
A321
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
522
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S AC9FF2.

Country allocation

The ICAO 24-bit address AC9FF2 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
AAL2845 American Airlines 7 2026-04-13
AAL611 American Airlines 6 2026-07-25
AAL2542 - 6 2026-07-16
AAL1563 American Airlines 6 2026-04-16
AAL3074 - 5 2026-07-16
AAL2172 - 5 2026-07-19
AAL2170 - 5 2026-07-20
AAL2033 - 5 2026-04-14
AAL859 - 4 2026-06-20
AAL777 American Airlines 4 2026-06-25
AAL317 American Airlines 4 2026-07-23
AAL3031 American Airlines 4 2026-04-17
AAL3009 American Airlines 4 2026-05-14
AAL2656 American Airlines 4 2026-05-12
AAL2143 - 4 2026-06-16
AAL2130 American Airlines 4 2026-04-24
AAL2101 American Airlines 4 2026-06-06
AAL2038 - 4 2026-07-07
AAL1979 American Airlines 4 2026-05-04
AAL1960 American Airlines 4 2026-06-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL2442 ORD → FLL Jul 26, 21:15 UTCJul 26, 22:30 UTC1h 15m
2026-07-26 AAL1688 SRQ → PHL Jul 26, 16:10 UTCJul 26, 19:55 UTC3h 45m
2026-07-26 AAL1867 SMF → PHX Jul 26, 13:10 UTCJul 26, 14:45 UTC1h 35m
2026-07-26 AAL2048 ZIH → DFW Jul 26, 04:15 UTCJul 26, 05:45 UTC1h 30m
2026-07-25 AAL1073 PHL → SRQ Jul 25, 22:50 UTCJul 26, 02:35 UTC3h 45m
2026-07-25 AAL1073 PHL → SRQ Jul 25, 22:47 UTCJul 26, 02:29 UTC3h 42m
2026-07-25 AAL611 FLL → PHL Jul 25, 18:29 UTCJul 25, 20:56 UTC2h 27m
2026-07-25 AAL611 FLL → PHL Jul 25, 14:45 UTCJul 25, 20:55 UTC6h 10m
2026-07-25 AAL1462 MIA → LGA Jul 25, 11:10 UTCJul 25, 13:00 UTC1h 50m
2026-07-25 AAL1843 CLT → BOS Jul 25, 03:35 UTCJul 25, 05:15 UTC1h 40m
2026-07-25 AAL1843 CLT → BOS Jul 25, 03:32 UTCJul 25, 05:10 UTC1h 38m
2026-07-24 AAL2496 CZM → ORD Jul 24, 23:30 UTCJul 25, 01:50 UTC2h 20m
2026-07-24 AAL2496 CZM → ORD Jul 24, 20:00 UTCJul 24, 22:25 UTC2h 25m
2026-07-24 AAL2248 CUN → CLT Jul 24, 15:50 UTCJul 24, 18:20 UTC2h 30m
2026-07-24 AAL881 CLT → CUN Jul 24, 12:10 UTCJul 24, 14:25 UTC2h 15m
2026-07-24 AAL881 CLT → CUN Jul 24, 12:08 UTCJul 24, 14:22 UTC2h 14m
2026-07-24 AAL3035 TPA → MIA Jul 24, 06:20 UTCJul 24, 10:30 UTC4h 10m
2026-07-24 AAL2055 SFO → MIA Jul 24, 00:23 UTCJul 24, 04:39 UTC4h 16m
2026-07-24 AAL2055 SFO → MIA Jul 24, 00:25 UTCJul 24, 04:40 UTC4h 15m
2026-07-23 AAL792 CUN → CLT Jul 23, 20:15 UTCJul 23, 22:35 UTC2h 20m
2026-07-23 AAL886 CLT → CUN Jul 23, 16:45 UTCJul 23, 19:00 UTC2h 15m
2026-07-23 AAL317 PVD → PHL Jul 23, 12:15 UTCJul 23, 14:20 UTC2h 5m
2026-07-20 AAL2409 ORD → TPA Jul 20, 22:15 UTCJul 21, 00:20 UTC2h 4m
2026-07-20 AAL2170 - Jul 20, 19:10 UTCJul 20, 20:45 UTC1h 35m
2026-07-20 AAL2170 MSY → CLT Jul 20, 19:10 UTCJul 20, 20:40 UTC1h 30m
2026-07-20 AAL2170 - Jul 20, 16:10 UTCJul 20, 17:35 UTC1h 25m
2026-07-20 AAL1002 - Jul 20, 12:05 UTCJul 20, 13:35 UTC1h 30m
2026-07-20 AAL1002 MSN → CLT Jul 20, 12:04 UTCJul 20, 13:35 UTC1h 31m
2026-07-20 AAL1426 - Jul 20, 04:00 UTCJul 20, 05:40 UTC1h 40m
2026-07-20 AAL2100 - Jul 20, 01:25 UTCJul 20, 02:35 UTC1h 10m
2026-07-19 AAL2100 - Jul 19, 22:55 UTCJul 20, 00:05 UTC1h 10m
2026-07-19 AAL3222 - Jul 19, 20:10 UTCJul 19, 21:30 UTC1h 20m
2026-07-19 AAL3330 MKE → CLT Jul 19, 16:25 UTCJul 19, 18:10 UTC1h 45m
2026-07-19 AAL3330 MKE → CLT Jul 19, 16:22 UTCJul 19, 18:10 UTC1h 48m
2026-07-19 AAL2172 MCO → DFW Jul 19, 12:45 UTCJul 19, 14:59 UTC2h 14m
2026-07-19 AAL2172 MCO → DFW Jul 19, 12:45 UTCJul 19, 15:00 UTC2h 15m
2026-07-19 AAL364 DFW → SJC Jul 19, 01:45 UTCJul 19, 04:00 UTC2h 15m
2026-07-18 AAL2870 PHL → STL Jul 18, 22:10 UTCJul 19, 00:20 UTC2h 10m
2026-07-18 AAL2870 PHL → STL Jul 18, 18:35 UTCJul 18, 20:40 UTC2h 5m
2026-07-18 AAL2893 ATL → ORD Jul 18, 14:05 UTCJul 18, 16:40 UTC2h 35m
2026-07-18 AAL1534 ONT → DFW Jul 18, 04:40 UTCJul 18, 07:05 UTC2h 25m
2026-07-18 AAL2485 - Jul 18, 00:15 UTCJul 18, 02:50 UTC2h 36m
2026-07-18 AAL2485 SAN → DFW Jul 18, 00:13 UTCJul 18, 02:49 UTC2h 36m
2026-07-17 AAL2485 DFW → SAN Jul 17, 20:20 UTCJul 17, 22:55 UTC2h 35m
2026-07-17 AAL617 DCA → TPA Jul 17, 16:19 UTCJul 17, 18:40 UTC2h 20m
2026-07-17 AAL3250 CLT → ORD Jul 17, 08:00 UTCJul 17, 08:10 UTC10m
2026-07-17 AAL3250 CLT → ORD Jul 17, 02:58 UTCJul 17, 07:44 UTC4h 46m
2026-07-17 AAL3250 CLT → ORD Jul 17, 02:59 UTCJul 17, 08:10 UTC5h 10m
2026-07-16 AAL1803 PHX → PHL Jul 16, 20:39 UTCJul 17, 00:50 UTC4h 10m
2026-07-16 AAL1803 PHX → PHL Jul 16, 20:38 UTCJul 17, 00:44 UTC4h 6m

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 N912UY page for operator, model, and routing details .

Mode-S AC9FF2 frequently asked

What is Mode-S code AC9FF2?
AC9FF2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N912UY.
Where is Mode-S AC9FF2 registered?
Mode-S code AC9FF2 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 AC9FF2 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC9FF2, octal 53117762, decimal 11,313,138.
What flights does AC9FF2 operate?
Mode-S AC9FF2 has broadcast 20 distinct callsigns, including AAL2845, AAL611, AAL2542, AAL1563, AAL3074.