Apparatus

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sensors Mode-S transponder

A25D10

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N251V · DE HAVILLAND DHC-2 Beaver · operated by N251V LLC

Hex
A25D10
Octal
50456420
Decimal
10,640,656
Country
US
Tail
N251V
Type
DHC2
No current signal · last broadcast 5h ago
Flights observed
117
Distinct callsigns
1
Country
US
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S A25D10.

Country allocation

The ICAO 24-bit address A25D10 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
N251V - 117 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 N251V - Jul 14, 16:35 UTCJul 14, 17:25 UTC50m
2026-07-14 N251V - Jul 14, 14:15 UTCJul 14, 15:25 UTC1h 10m
2026-07-13 N251V - Jul 13, 17:50 UTCJul 13, 19:10 UTC1h 20m
2026-07-12 N251V - Jul 12, 17:15 UTCJul 12, 18:05 UTC50m
2026-07-12 N251V - Jul 12, 14:20 UTCJul 12, 15:01 UTC40m
2026-07-11 N251V - Jul 11, 18:15 UTCJul 11, 18:30 UTC15m
2026-07-11 N251V - Jul 11, 14:20 UTCJul 11, 15:30 UTC1h 10m
2026-07-09 N251V - Jul 9, 20:25 UTCJul 9, 22:05 UTC1h 40m
2026-07-09 N251V - Jul 9, 12:35 UTCJul 9, 13:10 UTC35m
2026-07-08 N251V - Jul 8, 14:00 UTCJul 8, 15:15 UTC1h 15m
2026-07-07 N251V - Jul 7, 15:25 UTCJul 7, 16:05 UTC40m
2026-07-06 N251V - Jul 6, 19:25 UTCJul 6, 20:20 UTC55m
2026-07-06 N251V - Jul 6, 17:35 UTCJul 6, 18:00 UTC25m
2026-07-06 N251V - Jul 6, 14:55 UTCJul 6, 15:15 UTC20m
2026-07-05 N251V - Jul 5, 23:20 UTCJul 5, 23:35 UTC15m
2026-07-02 N251V - Jul 2, 15:05 UTCJul 2, 15:30 UTC25m
2026-07-01 N251V - Jul 1, 19:10 UTCJul 1, 19:55 UTC45m
2026-07-01 N251V - Jul 1, 16:35 UTCJul 1, 17:15 UTC40m
2026-06-30 N251V - Jun 30, 20:35 UTCJun 30, 21:15 UTC40m
2026-06-29 N251V - Jun 29, 14:50 UTCJun 29, 16:04 UTC1h 15m
2026-06-28 N251V - Jun 28, 18:10 UTCJun 28, 19:04 UTC55m
2026-06-28 N251V - Jun 28, 16:29 UTCJun 28, 17:19 UTC50m
2026-06-26 N251V - Jun 26, 20:15 UTCJun 26, 21:04 UTC50m
2026-06-26 N251V - Jun 26, 18:44 UTCJun 26, 19:20 UTC35m
2026-06-26 N251V - Jun 26, 16:00 UTCJun 26, 16:39 UTC40m
2026-06-26 N251V - Jun 26, 13:49 UTCJun 26, 15:05 UTC1h 15m
2026-06-21 N251V - Jun 21, 17:54 UTCJun 21, 18:04 UTC10m
2026-06-21 N251V - Jun 21, 14:34 UTCJun 21, 16:14 UTC1h 40m
2026-06-20 N251V - Jun 20, 21:30 UTCJun 20, 22:25 UTC55m
2026-06-20 N251V - Jun 20, 17:04 UTCJun 20, 17:34 UTC30m
2026-06-20 N251V - Jun 20, 14:44 UTCJun 20, 15:24 UTC40m
2026-06-19 N251V - Jun 19, 16:44 UTCJun 19, 17:39 UTC55m
2026-06-18 N251V - Jun 18, 15:05 UTCJun 18, 16:05 UTC1h 0m
2026-06-17 N251V - Jun 17, 22:15 UTCJun 17, 23:05 UTC50m
2026-06-17 N251V - Jun 17, 21:05 UTCJun 17, 21:35 UTC30m
2026-06-17 N251V - Jun 17, 18:55 UTCJun 17, 19:40 UTC45m
2026-06-17 N251V - Jun 17, 17:05 UTCJun 17, 17:35 UTC30m
2026-06-17 N251V - Jun 17, 14:25 UTCJun 17, 15:25 UTC1h 0m
2026-06-16 N251V - Jun 16, 17:59 UTCJun 16, 18:20 UTC20m
2026-06-16 N251V - Jun 16, 15:09 UTCJun 16, 15:40 UTC30m
2026-06-15 N251V - Jun 15, 14:10 UTCJun 15, 15:15 UTC1h 5m
2026-06-14 N251V - Jun 14, 17:05 UTCJun 14, 17:30 UTC25m
2026-06-14 N251V - Jun 14, 14:10 UTCJun 14, 14:50 UTC40m
2026-06-08 N251V - Jun 8, 20:50 UTCJun 8, 21:45 UTC55m
2026-06-07 N251V - Jun 7, 13:55 UTCJun 7, 14:40 UTC45m
2026-06-05 N251V - Jun 5, 19:20 UTCJun 5, 20:15 UTC55m
2026-06-05 N251V - Jun 5, 15:05 UTCJun 5, 15:30 UTC25m
2026-06-03 N251V - Jun 3, 14:35 UTCJun 3, 15:15 UTC40m
2026-06-03 N251V - Jun 3, 12:05 UTCJun 3, 12:25 UTC20m
2026-06-03 N251V - Jun 3, 00:05 UTCJun 3, 00:35 UTC30m

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 N251V page for operator, model, and routing details .

Mode-S A25D10 frequently asked

What is Mode-S code A25D10?
A25D10 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N251V.
Where is Mode-S A25D10 registered?
Mode-S code A25D10 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 A25D10 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A25D10, octal 50456420, decimal 10,640,656.
What flights does A25D10 operate?
Mode-S A25D10 has broadcast 1 distinct callsign, including N251V.