Apparatus

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sensors Mode-S transponder

A4AFBE

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N4005X · AIRBUS A-319 · operated by AMERICAN AIRLINES INC

Hex
A4AFBE
Octal
51127676
Decimal
10,792,894
Country
US
Tail
N4005X
Type
A319
No current signal · last broadcast Jul 26, 21:30 UTC
Flights observed
581
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:30 UTC

Last known position

Most recent position reported by Mode-S A4AFBE.

Country allocation

The ICAO 24-bit address A4AFBE 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
AAL2432 - 12 2026-07-18
AAL1973 American Airlines 12 2026-05-19
AAL2779 - 9 2026-07-11
AAL2737 American Airlines 9 2026-05-11
AAL3331 American Airlines 8 2026-07-20
AAL3246 - 8 2026-07-10
AAL3025 American Airlines 8 2026-07-25
AAL2655 American Airlines 8 2026-05-12
AAL2312 American Airlines 8 2026-07-24
AAL688 - 7 2026-07-07
AAL349 American Airlines 7 2026-05-11
AAL3065 American Airlines 7 2026-05-20
AAL2836 American Airlines 7 2026-05-12
AAL2741 - 7 2026-07-14
AAL2390 American Airlines 7 2026-05-10
AAL880 - 6 2026-07-03
AAL3129 - 6 2026-07-12
AAL2952 American Airlines 6 2026-05-10
AAL2910 American Airlines 6 2026-05-13
AAL2132 American Airlines 6 2026-05-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AAL1799 LAX → PHL Jul 26, 20:40 UTCJul 26, 21:30 UTC50m
2026-07-26 AAL1799 LAX → PHL Jul 26, 17:25 UTCJul 26, 19:00 UTC1h 35m
2026-07-26 AAL3024 ORD → SJD Jul 26, 14:00 UTCJul 26, 15:40 UTC1h 40m
2026-07-25 AAL3025 CLT → TVC Jul 25, 22:39 UTCJul 26, 00:34 UTC1h 55m
2026-07-25 AAL3025 CLT → TVC Jul 25, 22:40 UTCJul 26, 00:15 UTC1h 35m
2026-07-25 AAL305 MIA → SEA Jul 25, 18:35 UTCJul 25, 20:55 UTC2h 20m
2026-07-25 AAL305 MIA → SEA Jul 25, 18:27 UTCJul 25, 20:51 UTC2h 24m
2026-07-25 AAL1898 PHL → EYW Jul 25, 14:35 UTCJul 25, 16:55 UTC2h 20m
2026-07-25 AAL2335 ABQ → DFW Jul 25, 12:05 UTCJul 25, 12:50 UTC45m
2026-07-25 AAL2335 ABQ → DFW Jul 25, 12:03 UTCJul 25, 12:50 UTC47m
2026-07-25 AAL347 PUJ → MIA Jul 25, 00:20 UTCJul 25, 01:15 UTC55m
2026-07-24 AAL2312 DCA → LGA Jul 24, 22:15 UTCJul 24, 23:00 UTC45m
2026-07-24 AAL2312 DCA → LGA Jul 24, 22:13 UTCJul 24, 22:54 UTC41m
2026-07-24 AAL2312 DCA → LGA Jul 24, 20:30 UTCJul 24, 21:15 UTC45m
2026-07-24 AAL2403 ATL → DFW Jul 24, 18:25 UTCJul 24, 19:20 UTC55m
2026-07-24 AAL2403 ATL → DFW Jul 24, 16:20 UTCJul 24, 17:25 UTC1h 5m
2026-07-23 AAL3147 LAX → ELP Jul 23, 21:45 UTCJul 24, 00:15 UTC2h 30m
2026-07-23 AAL1814 DFW → PHL Jul 23, 18:15 UTCJul 23, 20:35 UTC2h 20m
2026-07-23 AAL1814 DFW → PHL Jul 23, 18:14 UTCJul 23, 20:49 UTC2h 35m
2026-07-23 AAL1396 AUS → DFW Jul 23, 16:05 UTCJul 23, 16:45 UTC40m
2026-07-23 AAL1396 DFW → AUS Jul 23, 14:00 UTCJul 23, 14:40 UTC40m
2026-07-23 AAL3031 CVG → DFW Jul 23, 11:05 UTCJul 23, 12:45 UTC1h 40m
2026-07-23 AAL3122 MCO → DFW Jul 23, 04:20 UTCJul 23, 05:42 UTC1h 22m
2026-07-23 AAL3122 MCO → DFW Jul 23, 04:20 UTCJul 23, 05:45 UTC1h 25m
2026-07-23 AAL883 QRO → DFW Jul 23, 00:20 UTCJul 23, 02:40 UTC2h 20m
2026-07-22 AAL1970 CVG → DFW Jul 22, 20:35 UTCJul 22, 22:50 UTC2h 15m
2026-07-22 AAL1970 CVG → DFW Jul 22, 20:34 UTCJul 22, 23:30 UTC2h 56m
2026-07-22 AAL2675 - Jul 22, 13:45 UTCJul 22, 16:40 UTC2h 55m
2026-07-22 AAL2661 PHL → SFO Jul 22, 02:30 UTCJul 22, 05:25 UTC2h 55m
2026-07-21 AAL3282 - Jul 21, 21:55 UTCJul 22, 00:15 UTC2h 20m
2026-07-21 AAL1883 PHL → MIA Jul 21, 18:20 UTCJul 21, 20:15 UTC1h 55m
2026-07-21 AAL1883 PHL → MIA Jul 21, 18:19 UTCJul 21, 20:33 UTC2h 14m
2026-07-21 AAL3024 ORD → SJD Jul 21, 14:35 UTCJul 21, 16:05 UTC1h 30m
2026-07-20 AAL3025 - Jul 20, 22:40 UTCJul 21, 00:10 UTC1h 30m
2026-07-20 AAL3025 DFW → EGE Jul 20, 22:39 UTCJul 21, 00:24 UTC1h 45m
2026-07-20 AAL2956 SFO → CLT Jul 20, 19:40 UTCJul 20, 21:25 UTC1h 45m
2026-07-20 AAL2956 SFO → CLT Jul 20, 18:59 UTCJul 20, 21:23 UTC2h 24m
2026-07-20 AAL3331 PHX → ORD Jul 20, 14:45 UTCJul 20, 17:05 UTC2h 20m
2026-07-20 AAL3331 PHX → ORD Jul 20, 14:45 UTCJul 20, 17:31 UTC2h 46m
2026-07-20 AAL1926 MSY → CLT Jul 20, 12:00 UTCJul 20, 12:50 UTC50m
2026-07-20 AAL1004 - Jul 20, 04:15 UTCJul 20, 05:00 UTC45m
2026-07-20 AAL1004 ORD → STL Jul 20, 04:14 UTCJul 20, 04:58 UTC44m
2026-07-20 AAL1951 SAN → PHX Jul 20, 01:45 UTCJul 20, 02:25 UTC40m
2026-07-20 AAL1951 SAN → PHX Jul 20, 00:20 UTCJul 20, 00:55 UTC35m
2026-07-19 AAL1974 - Jul 19, 20:35 UTCJul 19, 22:50 UTC2h 15m
2026-07-19 AAL1974 JAC → ORD Jul 19, 20:13 UTCJul 19, 22:35 UTC2h 22m
2026-07-19 AAL889 - Jul 19, 16:15 UTCJul 19, 17:55 UTC1h 40m
2026-07-19 AAL889 PHX → AUS Jul 19, 16:11 UTCJul 19, 18:35 UTC2h 24m
2026-07-19 AAL2862 - Jul 19, 13:25 UTCJul 19, 14:15 UTC50m
2026-07-19 AAL2862 ICT → DFW Jul 19, 13:24 UTCJul 19, 14:10 UTC46m

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 N4005X page for operator, model, and routing details .

Mode-S A4AFBE frequently asked

What is Mode-S code A4AFBE?
A4AFBE is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N4005X.
Where is Mode-S A4AFBE registered?
Mode-S code A4AFBE 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 A4AFBE broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4AFBE, octal 51127676, decimal 10,792,894.
What flights does A4AFBE operate?
Mode-S A4AFBE has broadcast 20 distinct callsigns, including AAL2432, AAL1973, AAL2779, AAL2737, AAL3331.