Apparatus

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sensors Mode-S transponder

A5A4C1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N463AA · AIRBUS A-321neo · operated by AMERICAN AIRLINES INC

Hex
A5A4C1
Octal
51322301
Decimal
10,855,617
Country
US
Tail
N463AA
Type
A21N
Broadcasting now · callsign AAL3022 · 32,975 ft
Flights observed
466
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:05 UTC

Current position

A5A4C1 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A5A4C1 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
AAL1354 - 9 2026-07-06
AAL675 - 8 2026-06-16
AAL3161 American Airlines 8 2026-05-11
AAL2888 - 8 2026-07-05
AAL664 American Airlines 7 2026-07-20
AAL59 American Airlines 6 2026-07-20
AAL432 - 6 2026-07-14
AAL266 American Airlines 6 2026-06-11
AAL119 American Airlines 6 2026-06-10
AAL694 - 5 2026-06-20
AAL645 - 5 2026-07-13
AAL315 - 5 2026-07-15
AAL2823 - 5 2026-07-18
AAL2608 - 5 2026-07-05
AAL2490 American Airlines 5 2026-05-20
AAL1719 American Airlines 5 2026-06-01
AAL144 - 5 2026-07-15
AAL14 - 5 2026-07-12
AAL1313 - 5 2026-07-05
AAL1240 American Airlines 5 2026-04-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL1335 MIA → DCA Jul 26, 20:40 UTCJul 26, 21:05 UTC25m
2026-07-26 AAL1335 MIA → DCA Jul 26, 19:55 UTCJul 26, 20:05 UTC10m
2026-07-26 AAL528 PHX → PHL Jul 26, 15:00 UTCJul 26, 17:15 UTC2h 15m
2026-07-26 AAL1545 PWM → DCA Jul 26, 05:05 UTCJul 26, 10:10 UTC5h 6m
2026-07-25 AAL2663 PHL → SFO Jul 25, 21:50 UTCJul 26, 03:10 UTC5h 20m
2026-07-25 AAL1528 MIA → PHL Jul 25, 15:20 UTCJul 25, 19:55 UTC4h 35m
2026-07-24 AAL713 DCA → PHX Jul 24, 11:25 UTCJul 24, 16:05 UTC4h 40m
2026-07-24 AAL1471 PHX → TPA Jul 24, 04:15 UTCJul 24, 09:20 UTC5h 5m
2026-07-23 AAL2009 SFO → PHL Jul 23, 22:30 UTCJul 24, 02:10 UTC3h 40m
2026-07-23 AAL3218 SFO → LAX Jul 23, 18:00 UTCJul 23, 20:45 UTC2h 45m
2026-07-23 AAL3218 SFO → LAX Jul 23, 17:57 UTCJul 23, 20:42 UTC2h 45m
2026-07-23 AAL713 DCA → PHX Jul 23, 11:25 UTCJul 23, 16:10 UTC4h 45m
2026-07-22 AAL2565 OAK → MIA Jul 22, 18:45 UTCJul 23, 00:05 UTC5h 20m
2026-07-22 AAL2565 OPF → SFO Jul 22, 11:45 UTCJul 22, 16:55 UTC5h 10m
2026-07-22 AAL918 LIM → MIA Jul 22, 03:25 UTCJul 22, 04:10 UTC45m
2026-07-21 AAL1307 - Jul 21, 20:20 UTCJul 22, 01:05 UTC4h 45m
2026-07-21 AAL1558 - Jul 21, 12:10 UTCJul 21, 17:00 UTC4h 50m
2026-07-21 AAL1558 LIM → MIA Jul 21, 11:53 UTCJul 21, 16:58 UTC5h 5m
2026-07-21 AAL385 BOS → DFW Jul 21, 03:45 UTCJul 21, 04:10 UTC25m
2026-07-21 AAL385 BOS → DFW Jul 21, 03:43 UTCJul 21, 08:58 UTC5h 15m
2026-07-20 AAL1562 - Jul 20, 22:35 UTCJul 21, 01:30 UTC2h 54m
2026-07-20 AAL1564 DFW → SAT Jul 20, 16:10 UTCJul 20, 20:40 UTC4h 30m
2026-07-20 AAL664 LAS → PHL Jul 20, 12:05 UTCJul 20, 13:20 UTC1h 15m
2026-07-20 AAL664 LAS → PHL Jul 20, 08:00 UTCJul 20, 08:10 UTC10m
2026-07-20 AAL59 LAX → KOA Jul 20, 01:55 UTCJul 20, 02:00 UTC5m
2026-07-19 AAL59 LAX → KOA Jul 19, 20:45 UTCJul 19, 21:15 UTC30m
2026-07-19 AAL500 - Jul 19, 15:05 UTCJul 19, 17:30 UTC2h 25m
2026-07-19 AAL3002 - Jul 19, 12:20 UTCJul 19, 13:05 UTC45m
2026-07-19 AAL2209 - Jul 19, 02:55 UTCJul 19, 03:30 UTC35m
2026-07-19 AAL2209 DFW → IAH Jul 19, 02:51 UTCJul 19, 03:30 UTC39m
2026-07-18 AAL2823 - Jul 18, 22:50 UTCJul 19, 01:15 UTC2h 25m
2026-07-18 AAL1102 - Jul 18, 20:00 UTCJul 18, 21:10 UTC1h 10m
2026-07-18 AAL1102 CUN → MIA Jul 18, 19:59 UTCJul 18, 21:10 UTC1h 11m
2026-07-18 AAL1157 - Jul 18, 17:10 UTCJul 18, 18:25 UTC1h 15m
2026-07-18 AAL1249 LGA → MIA Jul 18, 12:35 UTCJul 18, 15:30 UTC2h 55m
2026-07-18 AAL2945 - Jul 18, 03:05 UTCJul 18, 05:35 UTC2h 30m
2026-07-17 AAL3083 LGA → MCO Jul 17, 21:10 UTCJul 17, 23:39 UTC2h 30m
2026-07-17 AAL3284 - Jul 17, 17:44 UTCJul 17, 19:40 UTC1h 55m
2026-07-17 AAL2369 - Jul 17, 11:39 UTCJul 17, 14:15 UTC2h 35m
2026-07-17 AAL2369 JFK → PHX Jul 17, 11:38 UTCJul 17, 16:04 UTC4h 26m
2026-07-17 AAL1587 - Jul 17, 05:45 UTCJul 17, 10:15 UTC4h 30m
2026-07-17 AAL2466 - Jul 17, 02:59 UTCJul 17, 03:55 UTC55m
2026-07-17 AAL2466 PHX → SAN Jul 17, 00:25 UTCJul 17, 01:15 UTC50m
2026-07-16 AAL1057 BOS → PHX Jul 16, 17:21 UTCJul 16, 22:09 UTC4h 48m
2026-07-16 AAL1057 BOS → PHX Jul 16, 17:25 UTCJul 16, 22:15 UTC4h 50m
2026-07-16 AAL1416 - Jul 16, 15:14 UTCJul 16, 16:00 UTC45m
2026-07-16 AAL1416 PHL → BOS Jul 16, 15:10 UTCJul 16, 16:03 UTC53m
2026-07-16 AAL2129 MIA → PHL Jul 16, 10:59 UTCJul 16, 13:25 UTC2h 25m
2026-07-16 AAL2129 MIA → PHL Jul 16, 10:59 UTCJul 16, 13:20 UTC2h 21m
2026-07-16 AAL2823 - Jul 16, 01:30 UTCJul 16, 03:50 UTC2h 20m

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 N463AA page for operator, model, and routing details .

Mode-S A5A4C1 frequently asked

What is Mode-S code A5A4C1?
A5A4C1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N463AA.
Where is Mode-S A5A4C1 registered?
Mode-S code A5A4C1 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 A5A4C1 broadcasting right now?
Yes. Mode-S A5A4C1 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A5A4C1, octal 51322301, decimal 10,855,617.
What flights does A5A4C1 operate?
Mode-S A5A4C1 has broadcast 20 distinct callsigns, including AAL1354, AAL675, AAL3161, AAL2888, AAL664.