Apparatus

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sensors Mode-S transponder

A231AE

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N240TF · operated by AIR FLEET HOLDINGS LLC

Hex
A231AE
Octal
50430656
Decimal
10,629,550
Country
US
Tail
N240TF
Type
PA44
No current signal · last broadcast 9d ago
Flights observed
70
Distinct callsigns
1
Country
US
Last broadcast
9d ago

Last known position

Most recent position reported by Mode-S A231AE.

Country allocation

The ICAO 24-bit address A231AE 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 1 distinct

Callsign Airline Flights Last seen
TRF40 - 70 2026-06-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-11 TRF40 - Jun 11, 21:20 UTCJun 11, 22:45 UTC1h 25m
2026-06-11 TRF40 - Jun 11, 19:15 UTCJun 11, 20:50 UTC1h 35m
2026-06-11 TRF40 ADS → ADS Jun 11, 15:15 UTCJun 11, 16:25 UTC1h 10m
2026-06-10 TRF40 - Jun 10, 23:55 UTCJun 11, 03:30 UTC3h 35m
2026-06-10 TRF40 - Jun 10, 22:15 UTCJun 10, 23:00 UTC45m
2026-06-10 TRF40 - Jun 10, 18:55 UTCJun 10, 20:15 UTC1h 20m
2026-06-09 TRF40 - Jun 9, 23:35 UTCJun 10, 01:50 UTC2h 15m
2026-06-09 TRF40 - Jun 9, 19:25 UTCJun 9, 22:35 UTC3h 10m
2026-06-09 TRF40 - Jun 9, 13:15 UTCJun 9, 15:15 UTC2h 0m
2026-06-09 TRF40 - Jun 9, 10:30 UTCJun 9, 12:25 UTC1h 55m
2026-06-09 TRF40 - Jun 9, 01:50 UTCJun 9, 03:35 UTC1h 45m
2026-06-09 TRF40 - Jun 9, 00:00 UTCJun 9, 00:55 UTC55m
2026-06-08 TRF40 - Jun 8, 20:55 UTCJun 8, 22:40 UTC1h 45m
2026-06-08 TRF40 - Jun 8, 17:45 UTCJun 8, 19:55 UTC2h 10m
2026-06-07 TRF40 - Jun 7, 23:50 UTCJun 8, 01:30 UTC1h 40m
2026-06-07 TRF40 - Jun 7, 20:45 UTCJun 7, 23:00 UTC2h 15m
2026-06-06 TRF40 - Jun 6, 21:00 UTCJun 6, 23:00 UTC2h 0m
2026-06-06 TRF40 ADS → TRL Jun 6, 18:09 UTCJun 6, 20:14 UTC2h 5m
2026-06-05 TRF40 - Jun 5, 11:30 UTCJun 5, 13:05 UTC1h 35m
2026-06-05 TRF40 - Jun 5, 09:40 UTCJun 5, 10:30 UTC50m
2026-06-04 TRF40 - Jun 4, 21:00 UTCJun 4, 22:05 UTC1h 5m
2026-06-03 TRF40 ADS → ADS Jun 3, 16:40 UTCJun 3, 18:00 UTC1h 20m
2026-06-03 TRF40 - Jun 3, 13:45 UTCJun 3, 15:00 UTC1h 15m
2026-06-02 TRF40 ADS → ADS Jun 2, 17:15 UTCJun 2, 18:40 UTC1h 25m
2026-06-02 TRF40 ADS → ADS Jun 2, 14:40 UTCJun 2, 15:55 UTC1h 15m
2026-06-02 TRF40 ADS → ADS Jun 2, 12:25 UTCJun 2, 14:00 UTC1h 35m
2026-06-01 TRF40 - Jun 1, 12:25 UTCJun 1, 13:55 UTC1h 30m
2026-06-01 TRF40 ADS → ADS Jun 1, 00:25 UTCJun 1, 01:30 UTC1h 5m
2026-05-31 TRF40 - May 31, 21:35 UTCMay 31, 22:05 UTC30m
2026-05-31 TRF40 - May 31, 19:30 UTCMay 31, 20:50 UTC1h 20m
2026-05-31 TRF40 - May 31, 11:35 UTCMay 31, 15:30 UTC3h 55m
2026-05-30 TRF40 - May 30, 20:45 UTCMay 31, 00:05 UTC3h 20m
2026-05-30 TRF40 TRL → ADS May 30, 18:50 UTCMay 30, 20:05 UTC1h 15m
2026-05-30 TRF40 ADS → TRL May 30, 17:10 UTCMay 30, 18:10 UTC1h 0m
2026-05-30 TRF40 - May 30, 10:30 UTCMay 30, 14:00 UTC3h 30m
2026-05-30 TRF40 - May 30, 01:45 UTCMay 30, 03:45 UTC2h 0m
2026-05-30 TRF40 - May 30, 00:00 UTCMay 30, 00:50 UTC50m
2026-05-29 TRF40 ADS → ADS May 29, 20:30 UTCMay 29, 22:35 UTC2h 5m
2026-05-29 TRF40 - May 29, 13:10 UTCMay 29, 14:25 UTC1h 15m
2026-05-28 TRF40 - May 28, 20:50 UTCMay 28, 21:05 UTC15m
2026-05-28 TRF40 - May 28, 18:50 UTCMay 28, 19:55 UTC1h 5m
2026-05-28 TRF40 - May 28, 14:50 UTCMay 28, 16:05 UTC1h 15m
2026-05-27 TRF40 ADS → ADS May 27, 19:00 UTCMay 27, 20:20 UTC1h 20m
2026-05-26 TRF40 - May 26, 12:00 UTCMay 26, 13:40 UTC1h 40m
2026-05-08 TRF40 - May 8, 14:05 UTCMay 8, 14:25 UTC20m
2026-05-07 TRF40 - May 7, 20:05 UTCMay 7, 20:45 UTC40m
2026-05-07 TRF40 - May 7, 16:55 UTCMay 7, 17:45 UTC50m
2026-05-07 TRF40 - May 7, 12:25 UTCMay 7, 13:45 UTC1h 20m
2026-05-06 TRF40 - May 6, 18:30 UTCMay 6, 19:25 UTC55m
2026-05-05 TRF40 - May 5, 18:40 UTCMay 5, 19:30 UTC50m

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 N240TF page for operator, model, and routing details .

Mode-S A231AE frequently asked

What is Mode-S code A231AE?
A231AE is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N240TF.
Where is Mode-S A231AE registered?
Mode-S code A231AE 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 A231AE broadcasting right now?
No active broadcast right now. Last signal was 9d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A231AE, octal 50430656, decimal 10,629,550.
What flights does A231AE operate?
Mode-S A231AE has broadcast 1 distinct callsign, including TRF40.