Apparatus

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sensors Mode-S transponder

A25DF5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N25129 · operated by CAREER TRACK 3 LLC

Hex
A25DF5
Octal
50456765
Decimal
10,640,885
Country
US
Tail
N25129
Type
C172
No current signal · last broadcast 1h ago
Flights observed
172
Distinct callsigns
1
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A25DF5.

Country allocation

The ICAO 24-bit address A25DF5 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
CXK440 - 171 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CXK440 - Jul 14, 13:35 UTCJul 14, 14:55 UTC1h 20m
2026-07-14 CXK440 PWK → PWK Jul 14, 10:55 UTCJul 14, 11:50 UTC55m
2026-07-13 CXK440 PWK → PWK Jul 13, 21:35 UTCJul 13, 22:10 UTC35m
2026-07-13 CXK440 PWK → PWK Jul 13, 12:00 UTCJul 13, 13:35 UTC1h 35m
2026-07-12 CXK440 PWK → PWK Jul 12, 20:35 UTCJul 12, 22:15 UTC1h 40m
2026-07-12 CXK440 PWK → PWK Jul 12, 19:01 UTCJul 12, 19:30 UTC30m
2026-07-12 CXK440 PWK → PWK Jul 12, 16:05 UTCJul 12, 17:30 UTC1h 25m
2026-07-12 CXK440 CID → PWK Jul 12, 02:55 UTCJul 12, 05:55 UTC3h 0m
2026-07-12 CXK440 - Jul 12, 00:01 UTCJul 12, 01:35 UTC1h 35m
2026-07-11 CXK440 PWK → PWK Jul 11, 16:40 UTCJul 11, 17:05 UTC25m
2026-07-10 CXK440 - Jul 10, 19:40 UTCJul 10, 20:20 UTC40m
2026-07-10 CXK440 - Jul 10, 15:00 UTCJul 10, 17:35 UTC2h 35m
2026-07-09 CXK440 - Jul 9, 10:15 UTCJul 9, 11:25 UTC1h 10m
2026-07-05 CXK440 SUS → SUS Jul 5, 02:30 UTCJul 5, 04:15 UTC1h 45m
2026-07-04 CXK440 SUS → SUS Jul 4, 23:45 UTCJul 5, 01:20 UTC1h 35m
2026-07-03 CXK440 - Jul 3, 13:00 UTCJul 3, 14:45 UTC1h 45m
2026-07-02 CXK440 - Jul 2, 21:40 UTCJul 3, 00:05 UTC2h 25m
2026-07-01 CXK440 - Jul 1, 16:00 UTCJul 1, 16:45 UTC45m
2026-07-01 CXK440 - Jul 1, 13:30 UTCJul 1, 14:45 UTC1h 15m
2026-07-01 CXK440 DPA → DPA Jul 1, 11:45 UTCJul 1, 12:20 UTC35m
2026-07-01 CXK440 - Jul 1, 02:30 UTCJul 1, 04:35 UTC2h 5m
2026-07-01 CXK440 - Jul 1, 00:00 UTCJul 1, 01:20 UTC1h 20m
2026-06-30 CXK440 - Jun 30, 16:35 UTCJun 30, 17:55 UTC1h 20m
2026-06-30 CXK440 - Jun 30, 02:40 UTCJun 30, 04:15 UTC1h 35m
2026-06-30 CXK440 - Jun 30, 00:14 UTCJun 30, 01:55 UTC1h 41m
2026-06-29 CXK440 - Jun 29, 19:24 UTCJun 29, 20:35 UTC1h 10m
2026-06-29 CXK440 - Jun 29, 16:35 UTCJun 29, 17:55 UTC1h 20m
2026-06-29 CXK440 - Jun 29, 13:19 UTCJun 29, 14:29 UTC1h 10m
2026-06-29 CXK440 - Jun 29, 10:15 UTCJun 29, 11:35 UTC1h 20m
2026-06-27 CXK440 - Jun 27, 23:10 UTCJun 28, 00:00 UTC50m
2026-06-27 CXK440 - Jun 27, 21:59 UTCJun 27, 22:09 UTC10m
2026-06-27 CXK440 - Jun 27, 20:14 UTCJun 27, 21:10 UTC55m
2026-06-27 CXK440 - Jun 27, 16:24 UTCJun 27, 17:44 UTC1h 20m
2026-06-27 CXK440 - Jun 27, 12:55 UTCJun 27, 13:24 UTC30m
2026-06-27 CXK440 - Jun 27, 02:25 UTCJun 27, 04:15 UTC1h 50m
2026-06-26 CXK440 - Jun 26, 23:55 UTCJun 27, 01:35 UTC1h 40m
2026-06-26 CXK440 - Jun 26, 21:15 UTCJun 26, 22:55 UTC1h 40m
2026-06-26 CXK440 - Jun 26, 14:39 UTCJun 26, 16:09 UTC1h 30m
2026-06-25 CXK440 - Jun 25, 22:04 UTCJun 25, 22:14 UTC10m
2026-06-25 CXK440 - Jun 25, 19:15 UTCJun 25, 20:45 UTC1h 30m
2026-06-25 CXK440 - Jun 25, 14:09 UTCJun 25, 15:15 UTC1h 5m
2026-06-24 CXK440 - Jun 24, 03:00 UTCJun 24, 04:59 UTC2h 0m
2026-06-23 CXK440 - Jun 23, 19:24 UTCJun 23, 21:14 UTC1h 50m
2026-06-23 CXK440 - Jun 23, 01:10 UTCJun 23, 02:04 UTC55m
2026-06-22 CXK440 - Jun 22, 22:24 UTCJun 22, 23:45 UTC1h 20m
2026-06-22 CXK440 - Jun 22, 19:24 UTCJun 22, 20:49 UTC1h 25m
2026-06-22 CXK440 - Jun 22, 16:05 UTCJun 22, 17:25 UTC1h 20m
2026-06-22 CXK440 DPA → DPA Jun 22, 12:34 UTCJun 22, 13:29 UTC55m
2026-06-21 CXK440 - Jun 21, 23:40 UTCJun 22, 00:24 UTC45m
2026-06-21 CXK440 - Jun 21, 14:05 UTCJun 21, 14:59 UTC55m

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 N25129 page for operator, model, and routing details .

Mode-S A25DF5 frequently asked

What is Mode-S code A25DF5?
A25DF5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N25129.
Where is Mode-S A25DF5 registered?
Mode-S code A25DF5 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 A25DF5 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A25DF5, octal 50456765, decimal 10,640,885.
What flights does A25DF5 operate?
Mode-S A25DF5 has broadcast 1 distinct callsign, including CXK440.