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sensors Mode-S transponder

A4C72B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N407FM · BELL 407 · operated by CLASSIC NA LLC

Hex
A4C72B
Octal
51143453
Decimal
10,798,891
Country
US
Tail
N407FM
Type
B407
No current signal · last broadcast 5h ago
Flights observed
131
Distinct callsigns
1
Country
US
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S A4C72B.

Country allocation

The ICAO 24-bit address A4C72B 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
N407FM - 131 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 N407FM - Jul 14, 05:30 UTCJul 14, 05:40 UTC10m
2026-07-14 N407FM - Jul 14, 03:10 UTCJul 14, 03:20 UTC10m
2026-07-14 N407FM - Jul 14, 00:55 UTCJul 14, 01:05 UTC10m
2026-07-13 N407FM - Jul 13, 01:50 UTCJul 13, 02:01 UTC10m
2026-07-12 N407FM - Jul 12, 12:15 UTCJul 12, 12:25 UTC10m
2026-07-12 N407FM - Jul 12, 00:01 UTCJul 12, 00:20 UTC20m
2026-07-11 N407FM - Jul 11, 17:10 UTCJul 11, 17:20 UTC10m
2026-07-11 N407FM - Jul 11, 16:10 UTCJul 11, 16:30 UTC20m
2026-07-10 N407FM - Jul 10, 07:20 UTCJul 10, 07:55 UTC35m
2026-07-10 N407FM - Jul 10, 05:55 UTCJul 10, 06:20 UTC25m
2026-07-10 N407FM - Jul 10, 04:15 UTCJul 10, 04:45 UTC30m
2026-07-10 N407FM - Jul 10, 02:35 UTCJul 10, 02:50 UTC15m
2026-07-06 N407FM - Jul 6, 21:20 UTCJul 6, 21:30 UTC10m
2026-07-06 N407FM - Jul 6, 05:10 UTCJul 6, 05:55 UTC45m
2026-07-06 N407FM - Jul 6, 01:00 UTCJul 6, 01:15 UTC15m
2026-07-05 N407FM - Jul 5, 22:55 UTCJul 5, 23:15 UTC20m
2026-07-05 N407FM - Jul 5, 16:00 UTCJul 5, 16:05 UTC5m
2026-07-03 N407FM - Jul 3, 23:35 UTCJul 3, 23:45 UTC10m
2026-07-03 N407FM - Jul 3, 22:05 UTCJul 3, 22:15 UTC10m
2026-07-03 N407FM - Jul 3, 05:00 UTCJul 3, 05:15 UTC15m
2026-07-03 N407FM - Jul 3, 02:35 UTCJul 3, 02:45 UTC10m
2026-07-02 N407FM - Jul 2, 17:05 UTCJul 2, 17:35 UTC30m
2026-07-02 N407FM - Jul 2, 03:10 UTCJul 2, 04:00 UTC50m
2026-07-02 N407FM - Jul 2, 00:05 UTCJul 2, 01:05 UTC1h 0m
2026-07-01 N407FM - Jul 1, 21:40 UTCJul 1, 22:10 UTC30m
2026-07-01 N407FM CEZ → CEZ Jul 1, 04:05 UTCJul 1, 05:10 UTC1h 5m
2026-06-28 N407FM - Jun 28, 19:40 UTCJun 28, 19:59 UTC20m
2026-06-28 N407FM - Jun 28, 14:30 UTCJun 28, 14:39 UTC10m
2026-06-27 N407FM - Jun 27, 21:29 UTCJun 27, 21:59 UTC30m
2026-06-27 N407FM - Jun 27, 18:24 UTCJun 27, 18:35 UTC10m
2026-06-27 N407FM - Jun 27, 16:49 UTCJun 27, 17:04 UTC15m
2026-06-27 N407FM - Jun 27, 15:00 UTCJun 27, 15:55 UTC55m
2026-06-27 N407FM - Jun 27, 14:00 UTCJun 27, 14:20 UTC20m
2026-06-27 N407FM - Jun 27, 02:45 UTCJun 27, 02:50 UTC5m
2026-06-26 N407FM - Jun 26, 14:35 UTCJun 26, 14:55 UTC20m
2026-06-24 N407FM - Jun 24, 01:55 UTCJun 24, 02:05 UTC10m
2026-06-21 N407FM - Jun 21, 12:35 UTCJun 21, 12:44 UTC10m
2026-06-21 N407FM - Jun 21, 10:14 UTCJun 21, 10:29 UTC15m
2026-06-21 N407FM - Jun 21, 00:10 UTCJun 21, 01:05 UTC55m
2026-06-20 N407FM - Jun 20, 23:10 UTCJun 20, 23:29 UTC20m
2026-06-19 N407FM - Jun 19, 06:14 UTCJun 19, 06:29 UTC15m
2026-06-19 N407FM - Jun 19, 03:24 UTCJun 19, 03:39 UTC15m
2026-06-18 N407FM - Jun 18, 20:00 UTCJun 18, 20:15 UTC15m
2026-06-18 N407FM - Jun 18, 17:15 UTCJun 18, 17:30 UTC15m
2026-06-17 N407FM - Jun 17, 08:25 UTCJun 17, 08:40 UTC15m
2026-06-17 N407FM - Jun 17, 05:45 UTCJun 17, 06:00 UTC15m
2026-06-17 N407FM - Jun 17, 02:25 UTCJun 17, 02:35 UTC10m
2026-06-17 N407FM - Jun 17, 01:15 UTCJun 17, 01:25 UTC10m
2026-06-16 N407FM - Jun 16, 19:45 UTCJun 16, 20:35 UTC51m
2026-06-16 N407FM - Jun 16, 18:05 UTCJun 16, 18:39 UTC35m

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 N407FM page for operator, model, and routing details .

Mode-S A4C72B frequently asked

What is Mode-S code A4C72B?
A4C72B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N407FM.
Where is Mode-S A4C72B registered?
Mode-S code A4C72B 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 A4C72B broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4C72B, octal 51143453, decimal 10,798,891.
What flights does A4C72B operate?
Mode-S A4C72B has broadcast 1 distinct callsign, including N407FM.