Apparatus

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sensors Mode-S transponder

A2DF8F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N28421 · PIPER PA-28-140/150/160/180 · operated by CAE OXFORD AVIATION ACADEMY PHOENIX INC

Hex
A2DF8F
Octal
50557617
Decimal
10,674,063
Country
US
Tail
N28421
Type
P28A
No current signal · last broadcast 1d ago
Flights observed
11
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A2DF8F.

Country allocation

The ICAO 24-bit address A2DF8F 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
OXF3076 - 11 2026-04-13

Recent flights last 11

DateFlightRouteTakeoffLandingDuration
2026-04-13 OXF3076 - Apr 13, 20:50 UTCApr 13, 21:55 UTC1h 5m
2026-04-13 OXF3076 - Apr 13, 17:55 UTCApr 13, 19:00 UTC1h 5m
2026-04-13 OXF3076 - Apr 13, 16:15 UTCApr 13, 16:45 UTC30m
2026-04-13 OXF3076 - Apr 13, 15:50 UTCApr 13, 16:45 UTC55m
2026-04-13 OXF3076 - Apr 13, 15:40 UTCApr 13, 16:15 UTC35m
2026-04-13 OXF3076 - Apr 13, 13:55 UTCApr 13, 15:00 UTC1h 5m
2026-04-13 OXF3076 - Apr 13, 05:15 UTCApr 13, 07:30 UTC2h 15m
2026-04-13 OXF3076 - Apr 13, 04:20 UTCApr 13, 04:40 UTC20m
2026-04-13 OXF3076 - Apr 13, 03:55 UTCApr 13, 04:40 UTC45m
2026-04-13 OXF3076 - Apr 13, 02:25 UTCApr 13, 04:15 UTC1h 50m
2026-04-12 OXF3076 MSC → MSC Apr 12, 19:45 UTCApr 12, 20:15 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 N28421 page for operator, model, and routing details .

Mode-S A2DF8F frequently asked

What is Mode-S code A2DF8F?
A2DF8F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N28421.
Where is Mode-S A2DF8F registered?
Mode-S code A2DF8F 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 A2DF8F 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 A2DF8F, octal 50557617, decimal 10,674,063.
What flights does A2DF8F operate?
Mode-S A2DF8F has broadcast 1 distinct callsign, including OXF3076.