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sensors Mode-S transponder

A25DED

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N25121 · operated by CAREER TRACK 3 LLC

Hex
A25DED
Octal
50456755
Decimal
10,640,877
Country
US
Tail
N25121
Type
C172
Broadcasting now · callsign CXK134 · 4,325 ft
Flights observed
179
Distinct callsigns
1
Country
US
Last broadcast
27m ago

Current position

A25DED is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A25DED 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
CXK134 - 179 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 CXK134 - Jul 14, 10:55 UTCJul 14, 11:15 UTC20m
2026-07-13 CXK134 - Jul 13, 22:40 UTCJul 14, 00:05 UTC1h 25m
2026-07-13 CXK134 - Jul 13, 10:55 UTCJul 13, 11:30 UTC35m
2026-07-11 CXK134 YIP → YIP Jul 11, 22:40 UTCJul 11, 23:50 UTC1h 10m
2026-07-10 CXK134 YIP → YIP Jul 10, 18:20 UTCJul 10, 19:10 UTC50m
2026-07-10 CXK134 - Jul 10, 16:40 UTCJul 10, 17:05 UTC25m
2026-07-10 CXK134 - Jul 10, 15:40 UTCJul 10, 16:10 UTC30m
2026-07-10 CXK134 YIP → YIP Jul 10, 12:20 UTCJul 10, 12:55 UTC35m
2026-07-09 CXK134 YIP → YIP Jul 9, 11:20 UTCJul 9, 12:05 UTC45m
2026-07-09 CXK134 YIP → YIP Jul 9, 10:15 UTCJul 9, 10:40 UTC25m
2026-07-08 CXK134 - Jul 8, 21:00 UTCJul 8, 22:25 UTC1h 25m
2026-07-08 CXK134 - Jul 8, 16:40 UTCJul 8, 17:55 UTC1h 15m
2026-07-08 CXK134 YIP → YIP Jul 8, 00:15 UTCJul 8, 01:25 UTC1h 10m
2026-07-07 CXK134 - Jul 7, 22:20 UTCJul 7, 23:25 UTC1h 5m
2026-07-07 CXK134 YIP → YIP Jul 7, 19:10 UTCJul 7, 21:10 UTC2h 0m
2026-07-07 CXK134 YIP → YIP Jul 7, 14:05 UTCJul 7, 15:30 UTC1h 25m
2026-07-07 CXK134 - Jul 7, 11:30 UTCJul 7, 13:10 UTC1h 40m
2026-07-06 CXK134 YIP → YIP Jul 6, 18:20 UTCJul 6, 19:40 UTC1h 20m
2026-07-06 CXK134 - Jul 6, 13:10 UTCJul 6, 13:45 UTC35m
2026-07-06 CXK134 - Jul 6, 12:10 UTCJul 6, 12:40 UTC30m
2026-07-04 CXK134 YIP → YIP Jul 4, 16:25 UTCJul 4, 18:00 UTC1h 35m
2026-07-03 CXK134 - Jul 3, 19:40 UTCJul 3, 20:05 UTC25m
2026-07-03 CXK134 - Jul 3, 18:35 UTCJul 3, 19:10 UTC35m
2026-07-03 CXK134 - Jul 3, 16:00 UTCJul 3, 16:25 UTC25m
2026-07-03 CXK134 YIP → YIP Jul 3, 12:30 UTCJul 3, 13:55 UTC1h 25m
2026-07-02 CXK134 - Jul 2, 22:25 UTCJul 3, 00:00 UTC1h 35m
2026-07-02 CXK134 YIP → YIP Jul 2, 17:20 UTCJul 2, 17:55 UTC35m
2026-07-01 CXK134 - Jul 1, 23:55 UTCJul 2, 01:35 UTC1h 40m
2026-07-01 CXK134 YIP → YIP Jul 1, 21:00 UTCJul 1, 22:20 UTC1h 20m
2026-07-01 CXK134 - Jul 1, 16:40 UTCJul 1, 18:30 UTC1h 50m
2026-07-01 CXK134 - Jul 1, 16:00 UTCJul 1, 16:30 UTC30m
2026-07-01 CXK134 YIP → YIP Jul 1, 11:15 UTCJul 1, 13:00 UTC1h 45m
2026-07-01 CXK134 - Jul 1, 00:00 UTCJul 1, 01:50 UTC1h 50m
2026-06-30 CXK134 - Jun 30, 13:50 UTCJun 30, 15:35 UTC1h 45m
2026-06-30 CXK134 - Jun 30, 00:09 UTCJun 30, 01:50 UTC1h 41m
2026-06-29 CXK134 - Jun 29, 22:05 UTCJun 29, 23:14 UTC1h 10m
2026-06-29 CXK134 - Jun 29, 21:34 UTCJun 29, 22:00 UTC25m
2026-06-29 CXK134 - Jun 29, 18:55 UTCJun 29, 20:19 UTC1h 25m
2026-06-28 CXK134 - Jun 28, 19:04 UTCJun 28, 21:04 UTC2h 0m
2026-06-28 CXK134 - Jun 28, 16:14 UTCJun 28, 16:45 UTC30m
2026-06-28 CXK134 YIP → YIP Jun 28, 02:05 UTCJun 28, 04:10 UTC2h 5m
2026-06-27 CXK134 - Jun 27, 15:24 UTCJun 27, 16:39 UTC1h 15m
2026-06-26 CXK134 - Jun 26, 21:50 UTCJun 27, 00:05 UTC2h 15m
2026-06-25 CXK134 - Jun 25, 20:54 UTCJun 25, 22:39 UTC1h 45m
2026-06-25 CXK134 - Jun 25, 19:24 UTCJun 25, 20:14 UTC50m
2026-06-25 CXK134 - Jun 25, 17:09 UTCJun 25, 18:10 UTC1h 0m
2026-06-25 CXK134 - Jun 25, 13:59 UTCJun 25, 15:59 UTC2h 0m
2026-06-24 CXK134 - Jun 24, 18:39 UTCJun 24, 20:24 UTC1h 45m
2026-06-24 CXK134 - Jun 24, 14:00 UTCJun 24, 14:55 UTC55m
2026-06-23 CXK134 YIP → YIP Jun 23, 21:05 UTCJun 23, 22:40 UTC1h 35m

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 N25121 page for operator, model, and routing details .

Mode-S A25DED frequently asked

What is Mode-S code A25DED?
A25DED is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N25121.
Where is Mode-S A25DED registered?
Mode-S code A25DED 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 A25DED broadcasting right now?
Yes. Mode-S A25DED is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A25DED, octal 50456755, decimal 10,640,877.
What flights does A25DED operate?
Mode-S A25DED has broadcast 1 distinct callsign, including CXK134.