Apparatus

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sensors Mode-S transponder

AD3A0D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N951TF · operated by PIPER AIRCRAFT INC

Hex
AD3A0D
Octal
53235015
Decimal
11,352,589
Country
US
Tail
N951TF
No current signal · last broadcast 1h ago
Flights observed
77
Distinct callsigns
1
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S AD3A0D.

Country allocation

The ICAO 24-bit address AD3A0D 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
TRF551 - 77 2026-05-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 TRF551 - May 30, 05:35 UTCMay 30, 08:00 UTC2h 25m
2026-05-30 TRF551 - May 30, 03:40 UTCMay 30, 04:30 UTC50m
2026-05-30 TRF551 - May 30, 00:55 UTCMay 30, 02:15 UTC1h 20m
2026-05-29 TRF551 - May 29, 21:35 UTCMay 29, 22:30 UTC55m
2026-05-20 TRF551 MSC → MSC May 20, 14:35 UTCMay 20, 15:40 UTC1h 5m
2026-05-13 TRF551 - May 13, 20:50 UTCMay 13, 21:00 UTC10m
2026-05-09 TRF551 - May 9, 21:40 UTCMay 9, 22:55 UTC1h 15m
2026-05-05 TRF551 - May 5, 16:30 UTCMay 5, 17:55 UTC1h 25m
2026-05-04 TRF551 - May 4, 22:35 UTCMay 4, 23:25 UTC50m
2026-05-04 TRF551 - May 4, 20:40 UTCMay 4, 21:55 UTC1h 15m
2026-05-04 TRF551 - May 4, 16:55 UTCMay 4, 19:50 UTC2h 56m
2026-05-04 TRF551 - May 4, 14:40 UTCMay 4, 16:10 UTC1h 30m
2026-05-04 TRF551 - May 4, 00:25 UTCMay 4, 01:40 UTC1h 15m
2026-05-03 TRF551 - May 3, 22:45 UTCMay 3, 23:50 UTC1h 5m
2026-05-03 TRF551 - May 3, 19:25 UTCMay 3, 20:40 UTC1h 15m
2026-05-03 TRF551 - May 3, 16:15 UTCMay 3, 17:50 UTC1h 35m
2026-05-02 TRF551 - May 2, 22:25 UTCMay 2, 23:30 UTC1h 5m
2026-05-02 TRF551 - May 2, 19:35 UTCMay 2, 20:30 UTC55m
2026-05-02 TRF551 - May 2, 17:50 UTCMay 2, 18:55 UTC1h 5m
2026-05-01 TRF551 - May 1, 18:40 UTCMay 1, 20:05 UTC1h 25m
2026-04-30 TRF551 - Apr 30, 20:20 UTCApr 30, 20:40 UTC20m
2026-04-30 TRF551 - Apr 30, 17:10 UTCApr 30, 19:05 UTC1h 55m
2026-04-29 TRF551 - Apr 29, 16:30 UTCApr 29, 18:00 UTC1h 30m
2026-04-28 TRF551 - Apr 28, 22:45 UTCApr 29, 00:10 UTC1h 25m
2026-04-28 TRF551 - Apr 28, 18:45 UTCApr 28, 19:55 UTC1h 10m
2026-04-28 TRF551 - Apr 28, 16:20 UTCApr 28, 17:55 UTC1h 35m
2026-04-28 TRF551 MSC → MSC Apr 28, 13:40 UTCApr 28, 14:55 UTC1h 15m
2026-04-27 TRF551 - Apr 27, 16:25 UTCApr 27, 17:45 UTC1h 20m
2026-04-26 TRF551 - Apr 26, 22:30 UTCApr 27, 00:15 UTC1h 45m
2026-04-26 TRF551 - Apr 26, 14:45 UTCApr 26, 16:55 UTC2h 10m
2026-04-26 TRF551 MSC → MSC Apr 26, 00:30 UTCApr 26, 01:55 UTC1h 25m
2026-04-25 TRF551 - Apr 25, 18:25 UTCApr 25, 19:40 UTC1h 15m
2026-04-25 TRF551 - Apr 25, 16:30 UTCApr 25, 17:40 UTC1h 10m
2026-04-24 TRF551 - Apr 24, 20:25 UTCApr 24, 21:15 UTC50m
2026-04-24 TRF551 - Apr 24, 16:45 UTCApr 24, 17:25 UTC40m
2026-04-23 TRF551 - Apr 23, 20:15 UTCApr 23, 21:45 UTC1h 30m
2026-04-23 TRF551 - Apr 23, 16:10 UTCApr 23, 17:40 UTC1h 29m
2026-04-22 TRF551 - Apr 22, 20:20 UTCApr 22, 21:10 UTC50m
2026-04-22 TRF551 - Apr 22, 17:50 UTCApr 22, 18:55 UTC1h 5m
2026-04-22 TRF551 - Apr 22, 15:30 UTCApr 22, 16:40 UTC1h 10m
2026-04-21 TRF551 - Apr 21, 16:15 UTCApr 21, 17:30 UTC1h 15m
2026-04-21 TRF551 - Apr 21, 01:30 UTCApr 21, 02:15 UTC45m
2026-04-20 TRF551 - Apr 20, 22:35 UTCApr 20, 23:50 UTC1h 15m
2026-04-20 TRF551 - Apr 20, 20:40 UTCApr 20, 21:55 UTC1h 15m
2026-04-20 TRF551 - Apr 20, 17:35 UTCApr 20, 19:00 UTC1h 25m
2026-04-20 TRF551 - Apr 20, 14:40 UTCApr 20, 15:55 UTC1h 15m
2026-04-20 TRF551 - Apr 20, 03:05 UTCApr 20, 05:40 UTC2h 35m
2026-04-19 TRF551 - Apr 19, 19:25 UTCApr 19, 20:35 UTC1h 10m
2026-04-18 TRF551 - Apr 18, 15:20 UTCApr 18, 16:15 UTC55m
2026-04-18 TRF551 - Apr 18, 05:25 UTCApr 18, 06:15 UTC50m

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 N951TF page for operator, model, and routing details .

Mode-S AD3A0D frequently asked

What is Mode-S code AD3A0D?
AD3A0D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N951TF.
Where is Mode-S AD3A0D registered?
Mode-S code AD3A0D 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 AD3A0D broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD3A0D, octal 53235015, decimal 11,352,589.
What flights does AD3A0D operate?
Mode-S AD3A0D has broadcast 1 distinct callsign, including TRF551.