Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A0FCD4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N163AA · AIRBUS A-321 · operated by AMERICAN AIRLINES INC

Hex
A0FCD4
Octal
50176324
Decimal
10,550,484
Country
US
Tail
N163AA
Type
A321
No current signal · last broadcast Jul 26, 22:35 UTC
Flights observed
526
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:35 UTC

Last known position

Most recent position reported by Mode-S A0FCD4.

Country allocation

The ICAO 24-bit address A0FCD4 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
AAL2219 American Airlines 6 2026-04-16
AAL2103 American Airlines 5 2026-04-17
AAL1767 - 5 2026-07-16
AAL1454 - 5 2026-07-20
AAL870 - 4 2026-07-09
AAL3272 American Airlines 4 2026-04-14
AAL3086 American Airlines 4 2026-07-02
AAL2930 - 4 2026-07-11
AAL2874 - 4 2026-04-16
AAL2615 - 4 2026-07-23
AAL2306 American Airlines 4 2026-05-09
AAL1870 American Airlines 4 2026-06-05
AAL1629 American Airlines 4 2026-07-22
AAL1249 - 4 2026-04-13
AAL1199 American Airlines 4 2026-06-03
AAL777 American Airlines 3 2026-05-01
AAL599 American Airlines 3 2026-06-02
AAL503 American Airlines 3 2026-06-09
AAL420 American Airlines 3 2026-05-28
AAL391 American Airlines 3 2026-04-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL1507 DFW → CUN Jul 26, 20:00 UTCJul 26, 22:15 UTC2h 15m
2026-07-26 AAL2317 DCA → LGA Jul 26, 15:50 UTCJul 26, 18:30 UTC2h 40m
2026-07-26 AAL2766 LAX → DFW Jul 26, 00:10 UTCJul 26, 02:35 UTC2h 25m
2026-07-25 AAL2613 MSY → ORD Jul 25, 20:15 UTCJul 25, 22:25 UTC2h 10m
2026-07-25 AAL2613 MSY → ORD Jul 25, 20:14 UTCJul 25, 22:23 UTC2h 9m
2026-07-25 AAL2613 MSY → ORD Jul 25, 16:45 UTCJul 25, 18:55 UTC2h 10m
2026-07-25 AAL2029 DCA → BOS Jul 25, 13:30 UTCJul 25, 14:40 UTC1h 10m
2026-07-25 AAL841 ORD → DSM Jul 25, 01:25 UTCJul 25, 02:25 UTC1h 0m
2026-07-25 AAL841 ORD → DSM Jul 25, 01:24 UTCJul 25, 02:46 UTC1h 22m
2026-07-24 AAL1595 AUS → DFW Jul 24, 20:15 UTCJul 24, 23:40 UTC3h 25m
2026-07-24 AAL1595 AUS → DFW Jul 24, 15:35 UTCJul 24, 18:50 UTC3h 15m
2026-07-24 AAL2078 JFK → CLT Jul 24, 12:30 UTCJul 24, 13:55 UTC1h 25m
2026-07-24 AAL577 DFW → DEN Jul 24, 03:00 UTCJul 24, 05:05 UTC2h 5m
2026-07-23 AAL2456 SEA → PHL Jul 23, 22:25 UTCJul 24, 01:10 UTC2h 45m
2026-07-23 AAL2456 SEA → PHL Jul 23, 22:22 UTCJul 24, 01:07 UTC2h 45m
2026-07-23 AAL466 JFK → MIA Jul 23, 17:05 UTCJul 23, 21:20 UTC4h 15m
2026-07-23 AAL2615 - Jul 23, 14:00 UTCJul 23, 15:10 UTC1h 10m
2026-07-23 AAL2615 - Jul 23, 12:00 UTCJul 23, 13:10 UTC1h 10m
2026-07-23 AAL2237 JFK → SJD Jul 23, 05:25 UTCJul 23, 09:30 UTC4h 5m
2026-07-23 AAL2236 LGA → DCA Jul 23, 01:27 UTCJul 23, 03:50 UTC2h 23m
2026-07-23 AAL2236 LGA → DCA Jul 23, 01:30 UTCJul 23, 03:55 UTC2h 25m
2026-07-22 AAL1629 ORD → CLT Jul 22, 21:00 UTCJul 22, 23:45 UTC2h 45m
2026-07-22 AAL1629 ORD → CLT Jul 22, 17:15 UTCJul 22, 19:40 UTC2h 25m
2026-07-22 AAL484 CLT → EWR Jul 22, 12:30 UTCJul 22, 15:35 UTC3h 5m
2026-07-22 AAL1446 DFW → GEG Jul 22, 01:30 UTCJul 22, 04:45 UTC3h 15m
2026-07-21 AAL2501 EGI → DFW Jul 21, 21:50 UTCJul 21, 23:20 UTC1h 30m
2026-07-21 AAL2501 - Jul 21, 18:40 UTCJul 21, 20:05 UTC1h 25m
2026-07-21 AAL373 ORD → LIR Jul 21, 14:45 UTCJul 21, 17:20 UTC2h 35m
2026-07-21 AAL2568 DFW → SAN Jul 21, 04:15 UTCJul 21, 06:40 UTC2h 25m
2026-07-20 AAL2325 SFO → DFW Jul 20, 23:15 UTCJul 21, 02:30 UTC3h 14m
2026-07-20 AAL1687 SJU → AUS Jul 20, 17:05 UTCJul 20, 21:40 UTC4h 35m
2026-07-20 AAL2084 - Jul 20, 14:25 UTCJul 20, 15:40 UTC1h 15m
2026-07-20 AAL2084 - Jul 20, 12:00 UTCJul 20, 13:05 UTC1h 5m
2026-07-20 AAL1454 - Jul 20, 06:50 UTCJul 20, 10:40 UTC3h 50m
2026-07-20 AAL1797 - Jul 20, 02:30 UTCJul 20, 04:45 UTC2h 15m
2026-07-20 AAL1797 DFW → LAS Jul 20, 02:25 UTCJul 20, 04:36 UTC2h 11m
2026-07-19 AAL1288 PVR → DFW Jul 19, 22:40 UTCJul 20, 00:55 UTC2h 15m
2026-07-19 AAL1288 PVR → DFW Jul 19, 18:35 UTCJul 19, 20:50 UTC2h 15m
2026-07-19 AAL2305 - Jul 19, 14:00 UTCJul 19, 17:05 UTC3h 5m
2026-07-19 AAL2556 - Jul 19, 00:25 UTCJul 19, 05:05 UTC4h 40m
2026-07-19 AAL2556 CLT → SFO Jul 19, 00:21 UTCJul 19, 05:03 UTC4h 42m
2026-07-18 AAL1179 PUJ → CLT Jul 18, 18:32 UTCJul 18, 21:36 UTC3h 4m
2026-07-18 AAL1179 - Jul 18, 13:30 UTCJul 18, 21:35 UTC8h 5m
2026-07-18 AAL2670 FLL → CLT Jul 18, 11:00 UTCJul 18, 12:05 UTC1h 5m
2026-07-18 AAL1318 - Jul 18, 03:05 UTCJul 18, 04:00 UTC55m
2026-07-17 AAL2442 - Jul 17, 23:35 UTCJul 18, 01:00 UTC1h 25m
2026-07-17 AAL2442 - Jul 17, 21:05 UTCJul 17, 22:40 UTC1h 35m
2026-07-17 AAL1688 PHX → CLT Jul 17, 15:57 UTCJul 17, 19:37 UTC3h 40m
2026-07-17 AAL1688 - Jul 17, 16:00 UTCJul 17, 19:35 UTC3h 35m
2026-07-17 AAL474 DFW → PHX Jul 17, 12:25 UTCJul 17, 14:35 UTC2h 10m

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 N163AA page for operator, model, and routing details .

Mode-S A0FCD4 frequently asked

What is Mode-S code A0FCD4?
A0FCD4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N163AA.
Where is Mode-S A0FCD4 registered?
Mode-S code A0FCD4 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 A0FCD4 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A0FCD4, octal 50176324, decimal 10,550,484.
What flights does A0FCD4 operate?
Mode-S A0FCD4 has broadcast 20 distinct callsigns, including AAL2219, AAL2103, AAL1767, AAL1454, AAL870.