Apparatus

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sensors Mode-S transponder

A9725A

ICAO 24-bit transponder address · allocated to United States

Hex
A9725A
Octal
52271132
Decimal
11,104,858
Country
US
No current signal · last broadcast 1d ago
Flights observed
66
Distinct callsigns
2
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A9725A.

Country allocation

The ICAO 24-bit address A9725A 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 2 distinct

Callsign Airline Flights Last seen
VAR708 - 57 2026-07-16
N708AV - 9 2026-05-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 VAR708 - Jul 16, 20:15 UTCJul 16, 20:19 UTC5m
2026-07-16 VAR708 GYR → GYR Jul 16, 18:40 UTCJul 16, 20:09 UTC1h 30m
2026-07-16 VAR708 GYR → GYR Jul 16, 15:40 UTCJul 16, 17:20 UTC1h 40m
2026-07-16 VAR708 - Jul 16, 13:49 UTCJul 16, 14:15 UTC25m
2026-07-14 VAR708 - Jul 14, 14:05 UTCJul 14, 15:10 UTC1h 5m
2026-07-12 VAR708 - Jul 12, 03:30 UTCJul 12, 05:15 UTC1h 45m
2026-07-12 VAR708 - Jul 12, 01:35 UTCJul 12, 02:50 UTC1h 15m
2026-07-11 VAR708 GYR → GYR Jul 11, 21:35 UTCJul 11, 23:15 UTC1h 40m
2026-07-08 VAR708 - Jul 8, 22:50 UTCJul 8, 22:55 UTC5m
2026-07-08 VAR708 GYR → GYR Jul 8, 22:10 UTCJul 8, 22:45 UTC35m
2026-07-08 VAR708 GYR → GYR Jul 8, 19:25 UTCJul 8, 20:20 UTC55m
2026-07-08 VAR708 GYR → GYR Jul 8, 15:45 UTCJul 8, 17:20 UTC1h 35m
2026-07-08 VAR708 GYR → GYR Jul 8, 12:45 UTCJul 8, 14:25 UTC1h 40m
2026-07-08 VAR708 GYR → GYR Jul 8, 00:30 UTCJul 8, 01:05 UTC35m
2026-07-07 VAR708 GYR → GYR Jul 7, 21:30 UTCJul 7, 23:20 UTC1h 50m
2026-07-05 VAR708 GYR → GYR Jul 5, 22:20 UTCJul 6, 00:05 UTC1h 45m
2026-07-05 VAR708 GYR → GYR Jul 5, 19:10 UTCJul 5, 21:05 UTC1h 55m
2026-07-05 VAR708 GYR → GYR Jul 5, 04:20 UTCJul 5, 04:30 UTC10m
2026-07-05 VAR708 - Jul 5, 04:05 UTCJul 5, 04:10 UTC5m
2026-07-05 VAR708 GYR → GYR Jul 5, 03:55 UTCJul 5, 04:00 UTC5m
2026-07-04 VAR708 GYR → GYR Jul 4, 00:35 UTCJul 4, 02:15 UTC1h 40m
2026-07-03 VAR708 GYR → GYR Jul 3, 21:45 UTCJul 3, 23:20 UTC1h 35m
2026-07-03 VAR708 GYR → GYR Jul 3, 17:10 UTCJul 3, 18:45 UTC1h 35m
2026-07-03 VAR708 GYR → GYR Jul 3, 12:35 UTCJul 3, 14:30 UTC1h 55m
2026-07-02 VAR708 - Jul 2, 22:05 UTCJul 2, 23:20 UTC1h 15m
2026-07-02 VAR708 GYR → GYR Jul 2, 21:55 UTCJul 2, 22:00 UTC5m
2026-07-02 VAR708 GYR → GYR Jul 2, 15:10 UTCJul 2, 15:55 UTC45m
2026-07-01 VAR708 GYR → GYR Jul 1, 21:45 UTCJul 1, 23:55 UTC2h 10m
2026-07-01 VAR708 GYR → GYR Jul 1, 18:35 UTCJul 1, 20:20 UTC1h 45m
2026-07-01 VAR708 GYR → GYR Jul 1, 15:30 UTCJul 1, 16:15 UTC45m
2026-07-01 VAR708 GYR → GYR Jul 1, 12:45 UTCJul 1, 14:25 UTC1h 40m
2026-06-29 VAR708 GYR → GYR Jun 29, 16:00 UTCJun 29, 17:45 UTC1h 45m
2026-06-29 VAR708 GYR → GYR Jun 29, 12:39 UTCJun 29, 14:04 UTC1h 25m
2026-06-29 VAR708 - Jun 29, 04:09 UTCJun 29, 04:55 UTC45m
2026-06-28 VAR708 GYR → GYR Jun 28, 23:09 UTCJun 29, 01:10 UTC2h 0m
2026-06-27 VAR708 - Jun 27, 01:39 UTCJun 27, 03:09 UTC1h 30m
2026-06-25 VAR708 - Jun 25, 17:05 UTCJun 25, 18:59 UTC1h 55m
2026-06-25 VAR708 GYR → GYR Jun 25, 16:55 UTCJun 25, 16:59 UTC5m
2026-06-25 VAR708 GYR → GYR Jun 25, 12:40 UTCJun 25, 15:10 UTC2h 30m
2026-06-24 VAR708 GYR → GYR Jun 24, 21:14 UTCJun 24, 23:00 UTC1h 45m
2026-06-21 VAR708 - Jun 21, 19:14 UTCJun 21, 21:49 UTC2h 35m
2026-06-19 VAR708 GYR → GYR Jun 19, 15:59 UTCJun 19, 18:49 UTC2h 50m
2026-06-13 VAR708 - Jun 13, 06:50 UTCJun 13, 09:15 UTC2h 25m
2026-06-13 VAR708 - Jun 13, 03:30 UTCJun 13, 05:55 UTC2h 24m
2026-06-13 VAR708 - Jun 13, 01:00 UTCJun 13, 02:30 UTC1h 30m
2026-06-10 VAR708 - Jun 10, 22:35 UTCJun 10, 23:35 UTC1h 0m
2026-06-10 VAR708 GYR → HII Jun 10, 21:20 UTCJun 10, 22:30 UTC1h 10m
2026-06-09 VAR708 GYR → GYR Jun 9, 02:15 UTCJun 9, 03:15 UTC1h 0m
2026-06-07 VAR708 GYR → GYR Jun 7, 00:25 UTCJun 7, 01:20 UTC55m
2026-06-06 VAR708 - Jun 6, 00:30 UTCJun 6, 00:35 UTC5m

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.

Mode-S A9725A frequently asked

What is Mode-S code A9725A?
A9725A is an ICAO 24-bit transponder address. Allocated to United States.
Where is Mode-S A9725A registered?
Mode-S code A9725A 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 A9725A 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 A9725A, octal 52271132, decimal 11,104,858.
What flights does A9725A operate?
Mode-S A9725A has broadcast 2 distinct callsigns, including VAR708, N708AV.