Apparatus

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sensors Mode-S transponder

A4B722

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N4025M · operated by AIR TRACTOR INC

Hex
A4B722
Octal
51133442
Decimal
10,794,786
Country
US
Tail
N4025M
No current signal · last broadcast Jul 25, 23:10 UTC
Flights observed
26
Distinct callsigns
1
Country
US
Last broadcast
Jul 25, 23:10 UTC

Last known position

Most recent position reported by Mode-S A4B722.

Country allocation

The ICAO 24-bit address A4B722 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
N4025M - 26 2026-07-25

Recent flights last 26

DateFlightRouteTakeoffLandingDuration
2026-07-25 N4025M - Jul 25, 22:20 UTCJul 25, 23:10 UTC50m
2026-07-25 N4025M - Jul 25, 17:50 UTCJul 25, 20:20 UTC2h 30m
2026-07-23 N4025M - Jul 23, 21:40 UTCJul 23, 22:45 UTC1h 5m
2026-07-22 N4025M - Jul 22, 13:55 UTCJul 22, 15:30 UTC1h 35m
2026-07-22 N4025M - Jul 22, 12:05 UTCJul 22, 13:05 UTC1h 0m
2026-07-18 N4025M - Jul 18, 22:20 UTCJul 18, 22:30 UTC10m
2026-07-18 N4025M - Jul 18, 13:30 UTCJul 18, 13:55 UTC25m
2026-07-16 N4025M - Jul 16, 13:54 UTCJul 16, 14:05 UTC10m
2026-07-13 N4025M - Jul 13, 17:15 UTCJul 13, 18:35 UTC1h 20m
2026-07-13 N4025M - Jul 13, 16:05 UTCJul 13, 16:40 UTC35m
2026-07-13 N4025M - Jul 13, 15:20 UTCJul 13, 15:30 UTC10m
2026-07-13 N4025M - Jul 13, 13:05 UTCJul 13, 14:40 UTC1h 35m
2026-07-12 N4025M - Jul 12, 21:50 UTCJul 12, 22:15 UTC25m
2026-07-12 N4025M - Jul 12, 12:01 UTCJul 12, 13:30 UTC1h 30m
2026-07-10 N4025M - Jul 10, 22:20 UTCJul 10, 23:55 UTC1h 35m
2026-07-10 N4025M - Jul 10, 19:45 UTCJul 10, 19:55 UTC10m
2026-07-07 N4025M - Jul 7, 21:20 UTCJul 7, 21:30 UTC10m
2026-07-07 N4025M - Jul 7, 19:10 UTCJul 7, 19:25 UTC15m
2026-07-07 N4025M - Jul 7, 16:55 UTCJul 7, 17:10 UTC15m
2026-07-06 N4025M - Jul 6, 22:20 UTCJul 6, 23:00 UTC40m
2026-07-06 N4025M - Jul 6, 21:25 UTCJul 6, 21:45 UTC20m
2026-07-06 N4025M - Jul 6, 19:20 UTCJul 6, 19:30 UTC10m
2026-06-18 N4025M - Jun 18, 12:15 UTCJun 18, 12:45 UTC30m
2026-05-23 N4025M - May 23, 21:40 UTCMay 23, 22:00 UTC20m
2026-04-23 N4025M - Apr 23, 21:50 UTCApr 23, 22:10 UTC20m
2026-04-23 N4025M - Apr 23, 15:10 UTCApr 23, 15:20 UTC10m

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 N4025M page for operator, model, and routing details .

Mode-S A4B722 frequently asked

What is Mode-S code A4B722?
A4B722 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N4025M.
Where is Mode-S A4B722 registered?
Mode-S code A4B722 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 A4B722 broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 23:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4B722, octal 51133442, decimal 10,794,786.
What flights does A4B722 operate?
Mode-S A4B722 has broadcast 1 distinct callsign, including N4025M.