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sensors Mode-S transponder

A25039

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N2481G · CESSNA 182 Skylane · operated by BRADEN RYAN J

Hex
A25039
Octal
50450071
Decimal
10,637,369
Country
US
Tail
N2481G
Type
C182
No current signal · last broadcast 2d ago
Flights observed
41
Distinct callsigns
1
Country
US
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S A25039.

Country allocation

The ICAO 24-bit address A25039 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
N2481G - 41 2026-07-13

Recent flights last 41

DateFlightRouteTakeoffLandingDuration
2026-07-13 N2481G - Jul 13, 01:25 UTCJul 13, 01:45 UTC20m
2026-07-12 N2481G - Jul 12, 19:15 UTCJul 12, 19:45 UTC30m
2026-07-12 N2481G - Jul 12, 16:10 UTCJul 12, 17:05 UTC55m
2026-07-10 N2481G - Jul 10, 19:45 UTCJul 10, 21:10 UTC1h 25m
2026-07-10 N2481G - Jul 10, 03:00 UTCJul 10, 03:35 UTC35m
2026-07-10 N2481G - Jul 10, 00:15 UTCJul 10, 00:50 UTC35m
2026-07-06 N2481G - Jul 6, 01:45 UTCJul 6, 02:10 UTC25m
2026-07-02 N2481G - Jul 2, 21:10 UTCJul 2, 21:30 UTC20m
2026-07-02 N2481G - Jul 2, 19:45 UTCJul 2, 20:20 UTC35m
2026-06-29 N2481G - Jun 29, 01:10 UTCJun 29, 01:25 UTC15m
2026-06-21 N2481G - Jun 21, 22:04 UTCJun 21, 22:20 UTC15m
2026-06-21 N2481G - Jun 21, 18:50 UTCJun 21, 19:39 UTC50m
2026-06-21 N2481G - Jun 21, 03:55 UTCJun 21, 04:24 UTC30m
2026-06-19 N2481G - Jun 19, 18:59 UTCJun 19, 19:19 UTC20m
2026-06-15 N2481G - Jun 15, 01:45 UTCJun 15, 02:10 UTC25m
2026-06-14 N2481G - Jun 14, 21:00 UTCJun 14, 21:45 UTC45m
2026-06-13 N2481G - Jun 13, 15:50 UTCJun 13, 16:05 UTC15m
2026-06-08 N2481G - Jun 8, 01:55 UTCJun 8, 02:15 UTC20m
2026-06-07 N2481G - Jun 7, 22:00 UTCJun 7, 22:40 UTC40m
2026-06-07 N2481G - Jun 7, 18:40 UTCJun 7, 19:40 UTC1h 0m
2026-06-06 N2481G - Jun 6, 00:05 UTCJun 6, 00:15 UTC10m
2026-06-01 N2481G - Jun 1, 02:25 UTCJun 1, 02:45 UTC20m
2026-05-29 N2481G - May 29, 22:35 UTCMay 29, 23:25 UTC50m
2026-05-25 N2481G - May 25, 18:20 UTCMay 25, 18:45 UTC25m
2026-05-22 N2481G - May 22, 18:35 UTCMay 22, 18:55 UTC20m
2026-05-18 N2481G - May 18, 01:15 UTCMay 18, 01:30 UTC15m
2026-05-17 N2481G - May 17, 21:20 UTCMay 17, 21:55 UTC35m
2026-05-17 N2481G - May 17, 17:05 UTCMay 17, 17:35 UTC30m
2026-05-14 N2481G - May 14, 22:55 UTCMay 14, 23:05 UTC10m
2026-05-11 N2481G - May 11, 01:15 UTCMay 11, 01:30 UTC15m
2026-05-09 N2481G - May 9, 03:00 UTCMay 9, 03:20 UTC20m
2026-05-09 N2481G - May 9, 00:00 UTCMay 9, 00:15 UTC15m
2026-04-26 N2481G - Apr 26, 20:00 UTCApr 26, 20:15 UTC15m
2026-04-26 N2481G - Apr 26, 18:50 UTCApr 26, 19:00 UTC10m
2026-04-25 N2481G - Apr 25, 19:25 UTCApr 25, 19:35 UTC10m
2026-04-25 N2481G - Apr 25, 18:20 UTCApr 25, 18:30 UTC10m
2026-04-18 N2481G - Apr 18, 23:00 UTCApr 18, 23:25 UTC25m
2026-04-18 N2481G - Apr 18, 20:10 UTCApr 18, 20:25 UTC15m
2026-04-18 N2481G - Apr 18, 03:00 UTCApr 18, 03:20 UTC20m
2026-04-18 N2481G - Apr 18, 01:05 UTCApr 18, 01:20 UTC15m
2026-04-16 N2481G - Apr 16, 19:40 UTCApr 16, 20:00 UTC20m

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 N2481G page for operator, model, and routing details .

Mode-S A25039 frequently asked

What is Mode-S code A25039?
A25039 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N2481G.
Where is Mode-S A25039 registered?
Mode-S code A25039 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 A25039 broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A25039, octal 50450071, decimal 10,637,369.
What flights does A25039 operate?
Mode-S A25039 has broadcast 1 distinct callsign, including N2481G.