Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A6CFFC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N538UW · AIRBUS A-321 · operated by AMERICAN AIRLINES INC

Hex
A6CFFC
Octal
51547774
Decimal
10,932,220
Country
US
Tail
N538UW
Type
A321
No current signal · last broadcast Jul 26, 22:05 UTC
Flights observed
569
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:05 UTC

Last known position

Most recent position reported by Mode-S A6CFFC.

Country allocation

The ICAO 24-bit address A6CFFC 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
AAL2109 American Airlines 10 2026-07-17
AAL2501 American Airlines 7 2026-05-16
AAL2550 American Airlines 6 2026-05-29
AAL2238 - 6 2026-06-23
AAL2082 - 6 2026-07-11
AAL1150 - 6 2026-06-20
AAL3157 - 5 2026-07-16
AAL2904 - 5 2026-06-19
AAL2487 - 5 2026-07-11
AAL2334 - 5 2026-06-18
AAL2151 American Airlines 5 2026-04-17
AAL2128 - 5 2026-07-17
AAL1943 American Airlines 5 2026-05-01
AAL1635 - 5 2026-04-13
AAL1084 American Airlines 5 2026-04-25
AAL767 American Airlines 4 2026-07-23
AAL575 - 4 2026-06-20
AAL3203 - 4 2026-07-18
AAL3053 American Airlines 4 2026-07-26
AAL2832 American Airlines 4 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL2069 SLC → ORD Jul 26, 19:45 UTCJul 26, 22:00 UTC2h 15m
2026-07-26 AAL3053 DFW → RTB Jul 26, 14:50 UTCJul 26, 18:05 UTC3h 15m
2026-07-26 AAL3053 DFW → RTB Jul 26, 14:50 UTCJul 26, 18:02 UTC3h 12m
2026-07-26 AAL2928 MTY → JFK Jul 26, 12:35 UTCJul 26, 13:20 UTC45m
2026-07-26 AAL2928 MTY → JFK Jul 26, 12:31 UTCJul 26, 13:14 UTC43m
2026-07-25 AAL1905 PVD → CLT Jul 25, 23:25 UTCJul 26, 01:40 UTC2h 15m
2026-07-25 AAL2832 DFW → SFO Jul 25, 19:35 UTCJul 25, 20:50 UTC1h 15m
2026-07-25 AAL2832 DFW → SFO Jul 25, 17:15 UTCJul 25, 18:25 UTC1h 10m
2026-07-25 AAL2310 MIA → LGA Jul 25, 14:35 UTCJul 25, 15:30 UTC55m
2026-07-25 AAL2310 MIA → LGA Jul 25, 14:32 UTCJul 25, 15:37 UTC1h 5m
2026-07-25 AAL2310 MIA → LGA Jul 25, 12:35 UTCJul 25, 13:25 UTC50m
2026-07-25 AAL2310 MIA → LGA Jul 25, 12:31 UTCJul 25, 13:27 UTC56m
2026-07-25 AAL849 DFW → BOS Jul 25, 06:41 UTCJul 25, 10:25 UTC3h 44m
2026-07-25 AAL849 DFW → BOS Jul 25, 06:45 UTCJul 25, 10:20 UTC3h 35m
2026-07-24 AAL1073 PHL → SRQ Jul 24, 22:55 UTCJul 25, 02:35 UTC3h 40m
2026-07-24 AAL2030 DCA → LGA Jul 24, 17:25 UTCJul 24, 21:10 UTC3h 45m
2026-07-24 AAL2030 DCA → LGA Jul 24, 11:20 UTCJul 24, 15:15 UTC3h 55m
2026-07-24 AAL1860 CLT → MSY Jul 24, 05:00 UTCJul 24, 09:20 UTC4h 20m
2026-07-24 AAL1243 DFW → SAN Jul 24, 00:30 UTCJul 24, 02:55 UTC2h 25m
2026-07-23 AAL767 BNA → PHL Jul 23, 19:05 UTCJul 23, 22:30 UTC3h 25m
2026-07-23 AAL767 BNA → PHL Jul 23, 13:50 UTCJul 23, 17:30 UTC3h 40m
2026-07-23 AAL2605 RDU → DFW Jul 23, 09:35 UTCJul 23, 12:10 UTC2h 35m
2026-07-23 AAL542 DFW → RDU Jul 23, 03:40 UTCJul 23, 05:55 UTC2h 15m
2026-07-23 AAL542 DFW → RDU Jul 23, 03:38 UTCJul 23, 05:54 UTC2h 16m
2026-07-22 AAL402 DFW → PHL Jul 22, 22:55 UTCJul 23, 01:55 UTC3h 0m
2026-07-22 AAL402 DFW → PHL Jul 22, 17:50 UTCJul 22, 20:35 UTC2h 45m
2026-07-22 AAL2535 SAN → DFW Jul 22, 13:35 UTCJul 22, 16:05 UTC2h 30m
2026-07-22 AAL1011 DFW → SAN Jul 22, 04:06 UTCJul 22, 06:29 UTC2h 23m
2026-07-22 AAL1011 - Jul 22, 04:10 UTCJul 22, 05:25 UTC1h 15m
2026-07-21 AAL1902 ELP → DFW Jul 21, 12:20 UTCJul 21, 14:10 UTC1h 50m
2026-07-21 AAL2554 PWM → DCA Jul 21, 06:20 UTCJul 21, 10:00 UTC3h 40m
2026-07-21 AAL1430 DFW → SFO Jul 21, 01:45 UTCJul 21, 04:45 UTC3h 0m
2026-07-21 AAL1430 DFW → SFO Jul 21, 01:42 UTCJul 21, 04:45 UTC3h 3m
2026-07-20 AAL1595 - Jul 20, 20:35 UTCJul 20, 23:55 UTC3h 20m
2026-07-20 AAL1595 DFW → BOS Jul 20, 15:35 UTCJul 20, 19:00 UTC3h 25m
2026-07-20 AAL599 MCO → PHL Jul 20, 11:45 UTCJul 20, 14:00 UTC2h 15m
2026-07-20 AAL599 MCO → PHL Jul 20, 11:44 UTCJul 20, 14:00 UTC2h 16m
2026-07-20 AAL486 SNA → PHX Jul 20, 00:40 UTCJul 20, 02:40 UTC2h 0m
2026-07-19 AAL2252 BOS → CLT Jul 19, 17:35 UTCJul 19, 20:55 UTC3h 20m
2026-07-19 AAL3086 BNA → PHX Jul 19, 12:55 UTCJul 19, 15:50 UTC2h 55m
2026-07-19 AAL1370 - Jul 19, 00:10 UTCJul 19, 03:15 UTC3h 5m
2026-07-18 AAL3203 - Jul 18, 18:30 UTCJul 18, 22:55 UTC4h 25m
2026-07-18 AAL3203 - Jul 18, 18:05 UTCJul 18, 18:10 UTC5m
2026-07-18 AAL3203 - Jul 18, 17:50 UTCJul 18, 17:55 UTC5m
2026-07-18 AAL2783 PHL → AUS Jul 18, 15:25 UTCJul 18, 16:30 UTC1h 5m
2026-07-18 AAL2783 PHL → AUS Jul 18, 15:22 UTCJul 18, 16:30 UTC1h 8m
2026-07-18 AAL2783 PHL → AUS Jul 18, 13:25 UTCJul 18, 14:15 UTC50m
2026-07-18 AAL2783 PHL → AUS Jul 18, 13:05 UTCJul 18, 13:20 UTC15m
2026-07-17 AAL2109 LAX → DCA Jul 17, 23:14 UTCJul 18, 01:20 UTC2h 5m
2026-07-17 AAL2109 LAX → DCA Jul 17, 19:20 UTCJul 17, 21:25 UTC2h 5m

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 N538UW page for operator, model, and routing details .

Mode-S A6CFFC frequently asked

What is Mode-S code A6CFFC?
A6CFFC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N538UW.
Where is Mode-S A6CFFC registered?
Mode-S code A6CFFC 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 A6CFFC broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6CFFC, octal 51547774, decimal 10,932,220.
What flights does A6CFFC operate?
Mode-S A6CFFC has broadcast 20 distinct callsigns, including AAL2109, AAL2501, AAL2550, AAL2238, AAL2082.