Apparatus

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sensors Mode-S transponder

A25D2F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N251WF · operated by WIFA (WASHINGTON INTERNATIONAL FLIGHT ACADEMY) LLC

Hex
A25D2F
Octal
50456457
Decimal
10,640,687
Country
US
Tail
N251WF
Type
P28A
No current signal · last broadcast 1d ago
Flights observed
182
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A25D2F.

Country allocation

The ICAO 24-bit address A25D2F 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
N251WF - 182 2026-07-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 N251WF GAI → GAI Jul 16, 23:20 UTCJul 16, 23:59 UTC40m
2026-07-16 N251WF - Jul 16, 18:00 UTCJul 16, 18:59 UTC1h 0m
2026-07-16 N251WF GAI → GAI Jul 16, 14:25 UTCJul 16, 15:30 UTC1h 5m
2026-07-16 N251WF GAI → GAI Jul 16, 12:20 UTCJul 16, 12:55 UTC35m
2026-07-15 N251WF GAI → GAI Jul 15, 16:15 UTCJul 15, 17:45 UTC1h 30m
2026-07-15 N251WF - Jul 15, 14:00 UTCJul 15, 14:25 UTC25m
2026-07-15 N251WF GAI → GAI Jul 15, 12:00 UTCJul 15, 12:45 UTC45m
2026-07-14 N251WF - Jul 14, 19:55 UTCJul 14, 22:30 UTC2h 35m
2026-07-14 N251WF - Jul 14, 16:30 UTCJul 14, 18:50 UTC2h 20m
2026-07-14 N251WF - Jul 14, 13:55 UTCJul 14, 14:25 UTC30m
2026-07-14 N251WF - Jul 14, 11:55 UTCJul 14, 13:00 UTC1h 5m
2026-07-14 N251WF - Jul 14, 00:30 UTCJul 14, 01:20 UTC50m
2026-07-13 N251WF GAI → GAI Jul 13, 21:40 UTCJul 13, 22:40 UTC1h 0m
2026-07-13 N251WF - Jul 13, 19:10 UTCJul 13, 20:20 UTC1h 10m
2026-07-13 N251WF - Jul 13, 16:25 UTCJul 13, 17:15 UTC50m
2026-07-13 N251WF - Jul 13, 11:55 UTCJul 13, 13:05 UTC1h 10m
2026-07-12 N251WF GAI → GAI Jul 12, 19:50 UTCJul 12, 21:35 UTC1h 45m
2026-07-12 N251WF - Jul 12, 16:55 UTCJul 12, 17:15 UTC20m
2026-07-10 N251WF GAI → GAI Jul 10, 14:30 UTCJul 10, 15:10 UTC40m
2026-07-10 N251WF GAI → GAI Jul 10, 12:10 UTCJul 10, 12:50 UTC40m
2026-07-08 N251WF - Jul 8, 22:45 UTCJul 9, 00:15 UTC1h 30m
2026-07-05 N251WF GAI → GAI Jul 5, 16:40 UTCJul 5, 17:00 UTC20m
2026-07-05 N251WF - Jul 5, 12:10 UTCJul 5, 12:55 UTC45m
2026-07-04 N251WF GAI → GAI Jul 4, 16:05 UTCJul 4, 16:30 UTC25m
2026-07-04 N251WF GAI → GAI Jul 4, 12:45 UTCJul 4, 13:05 UTC20m
2026-07-04 N251WF GAI → GAI Jul 4, 12:15 UTCJul 4, 12:35 UTC20m
2026-07-03 N251WF GAI → GAI Jul 3, 17:00 UTCJul 3, 18:00 UTC1h 0m
2026-07-03 N251WF GAI → GAI Jul 3, 14:50 UTCJul 3, 15:20 UTC30m
2026-07-02 N251WF GAI → GAI Jul 2, 22:15 UTCJul 2, 23:10 UTC55m
2026-07-02 N251WF LNS → GAI Jul 2, 16:15 UTCJul 2, 17:45 UTC1h 30m
2026-07-02 N251WF GAI → LNS Jul 2, 14:50 UTCJul 2, 15:40 UTC50m
2026-07-02 N251WF GAI → GAI Jul 2, 12:05 UTCJul 2, 12:55 UTC50m
2026-07-01 N251WF - Jul 1, 22:20 UTCJul 1, 23:00 UTC40m
2026-07-01 N251WF - Jul 1, 12:50 UTCJul 1, 13:40 UTC50m
2026-06-30 N251WF GAI → GAI Jun 30, 18:25 UTCJun 30, 19:45 UTC1h 20m
2026-06-30 N251WF GAI → GAI Jun 30, 12:55 UTCJun 30, 13:50 UTC55m
2026-06-29 N251WF GAI → GAI Jun 29, 23:39 UTCJun 30, 00:25 UTC45m
2026-06-29 N251WF - Jun 29, 20:15 UTCJun 29, 21:30 UTC1h 15m
2026-06-29 N251WF GAI → GAI Jun 29, 17:10 UTCJun 29, 18:25 UTC1h 15m
2026-06-25 N251WF GAI → GAI Jun 25, 21:44 UTCJun 25, 23:14 UTC1h 30m
2026-06-25 N251WF GAI → GAI Jun 25, 18:24 UTCJun 25, 19:24 UTC1h 0m
2026-06-25 N251WF GAI → GAI Jun 25, 15:24 UTCJun 25, 16:09 UTC45m
2026-06-24 N251WF GAI → GAI Jun 24, 23:59 UTCJun 25, 00:59 UTC1h 0m
2026-06-24 N251WF - Jun 24, 21:44 UTCJun 24, 22:25 UTC40m
2026-06-24 N251WF GAI → GAI Jun 24, 18:20 UTCJun 24, 20:44 UTC2h 25m
2026-06-24 N251WF GAI → GAI Jun 24, 14:45 UTCJun 24, 15:49 UTC1h 5m
2026-06-24 N251WF - Jun 24, 12:20 UTCJun 24, 13:14 UTC55m
2026-06-23 N251WF GAI → GAI Jun 23, 23:24 UTCJun 23, 23:55 UTC30m
2026-06-19 N251WF GAI → GAI Jun 19, 18:14 UTCJun 19, 19:14 UTC1h 0m
2026-06-19 N251WF - Jun 19, 14:15 UTCJun 19, 15:24 UTC1h 10m

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 N251WF page for operator, model, and routing details .

Mode-S A25D2F frequently asked

What is Mode-S code A25D2F?
A25D2F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N251WF.
Where is Mode-S A25D2F registered?
Mode-S code A25D2F 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 A25D2F broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A25D2F, octal 50456457, decimal 10,640,687.
What flights does A25D2F operate?
Mode-S A25D2F has broadcast 1 distinct callsign, including N251WF.