Apparatus

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sensors Mode-S transponder

A2AF09

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N272MM · CESSNA 172 Skyhawk · operated by TOWNAIR LLC

Hex
A2AF09
Octal
50527411
Decimal
10,661,641
Country
US
Tail
N272MM
Type
C172
No current signal · last broadcast 17d ago
Flights observed
97
Distinct callsigns
1
Country
US
Last broadcast
17d ago

Last known position

Most recent position reported by Mode-S A2AF09.

Country allocation

The ICAO 24-bit address A2AF09 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
N272MM - 97 2026-06-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-30 N272MM - Jun 30, 22:10 UTCJun 30, 22:30 UTC20m
2026-06-30 N272MM SLC → SLC Jun 30, 18:40 UTCJun 30, 19:25 UTC45m
2026-06-30 N272MM SLC → SLC Jun 30, 16:10 UTCJun 30, 17:45 UTC1h 35m
2026-06-30 N272MM - Jun 30, 14:20 UTCJun 30, 15:30 UTC1h 10m
2026-06-30 N272MM SLC → SLC Jun 30, 02:40 UTCJun 30, 03:55 UTC1h 15m
2026-06-30 N272MM - Jun 30, 00:04 UTCJun 30, 01:45 UTC1h 41m
2026-06-29 N272MM SLC → SLC Jun 29, 19:05 UTCJun 29, 20:15 UTC1h 10m
2026-06-29 N272MM SLC → SLC Jun 29, 16:44 UTCJun 29, 18:30 UTC1h 45m
2026-06-29 N272MM - Jun 29, 13:44 UTCJun 29, 15:00 UTC1h 15m
2026-06-29 N272MM - Jun 29, 03:29 UTCJun 29, 05:30 UTC2h 0m
2026-06-29 N272MM SLC → SLC Jun 29, 00:34 UTCJun 29, 02:45 UTC2h 10m
2026-06-28 N272MM - Jun 28, 21:20 UTCJun 28, 23:04 UTC1h 45m
2026-06-28 N272MM SLC → SLC Jun 28, 18:44 UTCJun 28, 20:04 UTC1h 20m
2026-06-28 N272MM - Jun 28, 17:04 UTCJun 28, 17:55 UTC50m
2026-06-28 N272MM - Jun 28, 14:45 UTCJun 28, 15:40 UTC55m
2026-06-27 N272MM - Jun 27, 15:19 UTCJun 27, 16:59 UTC1h 40m
2026-06-25 N272MM - Jun 25, 17:49 UTCJun 25, 19:20 UTC1h 30m
2026-06-23 N272MM - Jun 23, 16:05 UTCJun 23, 17:39 UTC1h 35m
2026-06-22 N272MM - Jun 22, 21:59 UTCJun 22, 22:49 UTC50m
2026-06-22 N272MM - Jun 22, 20:19 UTCJun 22, 21:14 UTC55m
2026-06-22 N272MM - Jun 22, 16:24 UTCJun 22, 18:19 UTC1h 55m
2026-06-22 N272MM - Jun 22, 13:49 UTCJun 22, 15:29 UTC1h 40m
2026-06-21 N272MM - Jun 21, 15:30 UTCJun 21, 16:34 UTC1h 5m
2026-06-20 N272MM - Jun 20, 06:14 UTCJun 20, 07:19 UTC1h 5m
2026-06-20 N272MM - Jun 20, 03:09 UTCJun 20, 04:24 UTC1h 15m
2026-06-19 N272MM - Jun 19, 16:55 UTCJun 19, 17:49 UTC55m
2026-06-19 N272MM - Jun 19, 15:14 UTCJun 19, 15:59 UTC45m
2026-06-17 N272MM - Jun 17, 18:50 UTCJun 17, 19:20 UTC30m
2026-06-17 N272MM - Jun 17, 17:25 UTCJun 17, 18:10 UTC45m
2026-06-16 N272MM - Jun 16, 19:55 UTCJun 16, 20:25 UTC30m
2026-06-16 N272MM - Jun 16, 17:30 UTCJun 16, 17:59 UTC30m
2026-06-16 N272MM - Jun 16, 16:15 UTCJun 16, 16:50 UTC35m
2026-06-16 N272MM - Jun 16, 02:04 UTCJun 16, 02:40 UTC35m
2026-06-15 N272MM - Jun 15, 13:54 UTCJun 15, 14:30 UTC35m
2026-06-14 N272MM - Jun 14, 19:30 UTCJun 14, 20:25 UTC55m
2026-06-14 N272MM - Jun 14, 15:45 UTCJun 14, 16:40 UTC55m
2026-06-13 N272MM SLC → SLC Jun 13, 20:45 UTCJun 13, 21:45 UTC1h 0m
2026-06-11 N272MM - Jun 11, 21:10 UTCJun 11, 21:40 UTC30m
2026-06-11 N272MM OGD → OGD Jun 11, 12:35 UTCJun 11, 13:45 UTC1h 10m
2026-05-18 N272MM - May 18, 19:10 UTCMay 18, 19:30 UTC20m
2026-05-07 N272MM BTF → SLC May 7, 19:25 UTCMay 7, 20:35 UTC1h 10m
2026-05-04 N272MM - May 4, 15:35 UTCMay 4, 17:10 UTC1h 35m
2026-05-03 N272MM - May 3, 20:40 UTCMay 3, 21:14 UTC35m
2026-05-03 N272MM - May 3, 17:29 UTCMay 3, 18:20 UTC50m
2026-05-03 N272MM - May 3, 16:55 UTCMay 3, 17:24 UTC30m
2026-05-03 N272MM - May 3, 03:30 UTCMay 3, 04:25 UTC55m
2026-05-03 N272MM - May 3, 01:50 UTCMay 3, 02:55 UTC1h 5m
2026-05-02 N272MM - May 2, 20:15 UTCMay 2, 21:35 UTC1h 20m
2026-05-02 N272MM - May 2, 16:10 UTCMay 2, 16:50 UTC40m
2026-05-02 N272MM - May 2, 04:30 UTCMay 2, 05:35 UTC1h 5m

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 N272MM page for operator, model, and routing details .

Mode-S A2AF09 frequently asked

What is Mode-S code A2AF09?
A2AF09 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N272MM.
Where is Mode-S A2AF09 registered?
Mode-S code A2AF09 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 A2AF09 broadcasting right now?
No active broadcast right now. Last signal was 17d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2AF09, octal 50527411, decimal 10,661,641.
What flights does A2AF09 operate?
Mode-S A2AF09 has broadcast 1 distinct callsign, including N272MM.