Apparatus

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sensors Mode-S transponder

A07531

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N129AR · AGUSTA AW-109 Grand · operated by AIR METHODS LLC

Hex
A07531
Octal
50072461
Decimal
10,515,761
Country
US
Tail
N129AR
Type
A109
No current signal · last broadcast 14d ago
Flights observed
112
Distinct callsigns
1
Country
US
Last broadcast
14d ago

Last known position

Most recent position reported by Mode-S A07531.

Country allocation

The ICAO 24-bit address A07531 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
N129AR - 112 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-20 N129AR - Jul 20, 19:45 UTCJul 20, 19:55 UTC10m
2026-07-20 N129AR - Jul 20, 01:25 UTCJul 20, 01:35 UTC10m
2026-07-20 N129AR - Jul 20, 00:40 UTCJul 20, 00:50 UTC10m
2026-07-19 N129AR - Jul 19, 09:00 UTCJul 19, 09:15 UTC15m
2026-07-15 N129AR - Jul 15, 01:30 UTCJul 15, 01:40 UTC10m
2026-07-13 N129AR - Jul 13, 06:15 UTCJul 13, 06:25 UTC10m
2026-07-13 N129AR - Jul 13, 04:50 UTCJul 13, 05:05 UTC15m
2026-07-13 N129AR - Jul 13, 00:40 UTCJul 13, 01:15 UTC35m
2026-07-12 N129AR - Jul 12, 14:25 UTCJul 12, 14:35 UTC10m
2026-07-12 N129AR - Jul 12, 13:35 UTCJul 12, 13:45 UTC10m
2026-07-12 N129AR - Jul 12, 09:40 UTCJul 12, 09:55 UTC15m
2026-07-12 N129AR - Jul 12, 08:55 UTCJul 12, 09:05 UTC10m
2026-07-10 N129AR - Jul 10, 22:30 UTCJul 10, 22:40 UTC10m
2026-07-10 N129AR - Jul 10, 09:50 UTCJul 10, 10:00 UTC10m
2026-07-10 N129AR - Jul 10, 09:05 UTCJul 10, 09:15 UTC10m
2026-07-10 N129AR - Jul 10, 05:50 UTCJul 10, 06:05 UTC15m
2026-07-10 N129AR - Jul 10, 04:45 UTCJul 10, 04:55 UTC10m
2026-07-09 N129AR - Jul 9, 20:30 UTCJul 9, 20:45 UTC15m
2026-07-08 N129AR - Jul 8, 11:30 UTCJul 8, 11:40 UTC10m
2026-07-07 N129AR - Jul 7, 16:25 UTCJul 7, 16:35 UTC10m
2026-07-07 N129AR - Jul 7, 03:15 UTCJul 7, 03:25 UTC10m
2026-07-07 N129AR - Jul 7, 01:45 UTCJul 7, 01:55 UTC10m
2026-07-06 N129AR - Jul 6, 22:55 UTCJul 6, 23:05 UTC10m
2026-07-04 N129AR - Jul 4, 20:05 UTCJul 4, 20:20 UTC15m
2026-07-04 N129AR - Jul 4, 19:05 UTCJul 4, 19:15 UTC10m
2026-07-04 N129AR - Jul 4, 18:10 UTCJul 4, 18:30 UTC20m
2026-07-04 N129AR - Jul 4, 13:35 UTCJul 4, 13:45 UTC10m
2026-07-04 N129AR - Jul 4, 12:20 UTCJul 4, 12:30 UTC10m
2026-07-04 N129AR - Jul 4, 11:15 UTCJul 4, 11:25 UTC10m
2026-07-03 N129AR - Jul 3, 18:40 UTCJul 3, 18:50 UTC10m
2026-07-03 N129AR - Jul 3, 13:05 UTCJul 3, 13:40 UTC35m
2026-07-03 N129AR - Jul 3, 11:55 UTCJul 3, 12:05 UTC10m
2026-07-03 N129AR - Jul 3, 05:20 UTCJul 3, 05:30 UTC10m
2026-07-01 N129AR - Jul 1, 18:40 UTCJul 1, 18:50 UTC10m
2026-07-01 N129AR - Jul 1, 16:40 UTCJul 1, 16:50 UTC10m
2026-07-01 N129AR - Jul 1, 06:40 UTCJul 1, 07:05 UTC25m
2026-06-29 N129AR - Jun 29, 05:15 UTCJun 29, 05:24 UTC10m
2026-06-29 N129AR - Jun 29, 02:30 UTCJun 29, 03:25 UTC55m
2026-06-25 N129AR - Jun 25, 23:34 UTCJun 25, 23:44 UTC10m
2026-06-25 N129AR - Jun 25, 22:39 UTCJun 25, 22:49 UTC10m
2026-06-25 N129AR - Jun 25, 21:29 UTCJun 25, 21:40 UTC10m
2026-06-24 N129AR - Jun 24, 15:05 UTCJun 24, 15:24 UTC20m
2026-06-18 N129AR - Jun 18, 22:25 UTCJun 18, 22:40 UTC15m
2026-06-18 N129AR - Jun 18, 21:55 UTCJun 18, 22:05 UTC10m
2026-06-18 N129AR - Jun 18, 19:00 UTCJun 18, 19:20 UTC20m
2026-06-18 N129AR - Jun 18, 16:20 UTCJun 18, 16:50 UTC30m
2026-06-17 N129AR - Jun 17, 10:45 UTCJun 17, 11:05 UTC20m
2026-06-17 N129AR - Jun 17, 09:45 UTCJun 17, 09:55 UTC10m
2026-06-17 N129AR - Jun 17, 08:25 UTCJun 17, 08:55 UTC30m
2026-06-08 N129AR - Jun 8, 00:05 UTCJun 8, 00:25 UTC20m

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 N129AR page for operator, model, and routing details .

Mode-S A07531 frequently asked

What is Mode-S code A07531?
A07531 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N129AR.
Where is Mode-S A07531 registered?
Mode-S code A07531 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 A07531 broadcasting right now?
No active broadcast right now. Last signal was 14d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A07531, octal 50072461, decimal 10,515,761.
What flights does A07531 operate?
Mode-S A07531 has broadcast 1 distinct callsign, including N129AR.