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sensors Mode-S transponder

AA03BF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N7440A · CESSNA 172 Skyhawk · operated by N7440A LLC

Hex
AA03BF
Octal
52401677
Decimal
11,142,079
Country
US
Tail
N7440A
Type
C172
No current signal · last broadcast Jul 25, 21:15 UTC
Flights observed
40
Distinct callsigns
1
Country
US
Last broadcast
Jul 25, 21:15 UTC

Last known position

Most recent position reported by Mode-S AA03BF.

Country allocation

The ICAO 24-bit address AA03BF 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
N7440A - 40 2026-07-25

Recent flights last 40

DateFlightRouteTakeoffLandingDuration
2026-07-25 N7440A - Jul 25, 20:40 UTCJul 25, 21:15 UTC35m
2026-07-24 N7440A - Jul 24, 17:35 UTCJul 24, 18:05 UTC30m
2026-07-24 N7440A - Jul 24, 13:50 UTCJul 24, 14:20 UTC30m
2026-07-23 N7440A - Jul 23, 20:05 UTCJul 23, 20:30 UTC25m
2026-07-23 N7440A - Jul 23, 17:35 UTCJul 23, 17:55 UTC20m
2026-07-23 N7440A - Jul 23, 16:20 UTCJul 23, 16:40 UTC20m
2026-07-23 N7440A - Jul 23, 13:40 UTCJul 23, 14:25 UTC45m
2026-07-22 N7440A - Jul 22, 21:40 UTCJul 22, 22:10 UTC30m
2026-07-22 N7440A - Jul 22, 19:20 UTCJul 22, 19:50 UTC30m
2026-07-19 N7440A - Jul 19, 17:10 UTCJul 19, 17:25 UTC15m
2026-07-19 N7440A - Jul 19, 15:15 UTCJul 19, 15:30 UTC15m
2026-07-16 N7440A - Jul 16, 02:30 UTCJul 16, 02:55 UTC25m
2026-07-16 N7440A - Jul 16, 00:55 UTCJul 16, 01:15 UTC20m
2026-07-14 N7440A - Jul 14, 18:50 UTCJul 14, 19:30 UTC40m
2026-07-14 N7440A - Jul 14, 17:10 UTCJul 14, 17:25 UTC15m
2026-07-14 N7440A YIP → PTK Jul 14, 15:10 UTCJul 14, 15:30 UTC20m
2026-07-14 N7440A - Jul 14, 12:55 UTCJul 14, 13:15 UTC20m
2026-07-13 N7440A - Jul 13, 17:50 UTCJul 13, 18:25 UTC35m
2026-07-13 N7440A - Jul 13, 16:25 UTCJul 13, 16:55 UTC30m
2026-07-07 N7440A - Jul 7, 12:40 UTCJul 7, 13:00 UTC20m
2026-07-06 N7440A - Jul 6, 21:00 UTCJul 6, 21:45 UTC45m
2026-07-01 N7440A - Jul 1, 18:45 UTCJul 1, 19:20 UTC35m
2026-07-01 N7440A - Jul 1, 14:45 UTCJul 1, 15:05 UTC20m
2026-07-01 N7440A - Jul 1, 13:10 UTCJul 1, 13:25 UTC15m
2026-06-30 N7440A - Jun 30, 17:00 UTCJun 30, 17:40 UTC40m
2026-06-30 N7440A - Jun 30, 14:30 UTCJun 30, 14:50 UTC20m
2026-06-15 N7440A - Jun 15, 17:10 UTCJun 15, 17:25 UTC15m
2026-06-15 N7440A - Jun 15, 15:59 UTCJun 15, 16:15 UTC15m
2026-06-14 N7440A - Jun 14, 21:25 UTCJun 14, 21:45 UTC20m
2026-06-11 N7440A - Jun 11, 18:10 UTCJun 11, 18:20 UTC10m
2026-06-11 N7440A - Jun 11, 15:35 UTCJun 11, 16:20 UTC45m
2026-06-11 N7440A - Jun 11, 13:05 UTCJun 11, 14:10 UTC1h 5m
2026-06-11 N7440A - Jun 11, 11:45 UTCJun 11, 12:10 UTC25m
2026-06-04 N7440A - Jun 4, 11:10 UTCJun 4, 11:30 UTC20m
2026-06-03 N7440A - Jun 3, 23:50 UTCJun 4, 00:25 UTC35m
2026-06-03 N7440A - Jun 3, 19:40 UTCJun 3, 20:30 UTC50m
2026-06-02 N7440A - Jun 2, 19:00 UTCJun 2, 19:30 UTC30m
2026-06-02 N7440A - Jun 2, 16:40 UTCJun 2, 17:10 UTC30m
2026-05-28 N7440A - May 28, 19:25 UTCMay 28, 19:45 UTC20m
2026-05-28 N7440A - May 28, 17:25 UTCMay 28, 17:45 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 N7440A page for operator, model, and routing details .

Mode-S AA03BF frequently asked

What is Mode-S code AA03BF?
AA03BF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N7440A.
Where is Mode-S AA03BF registered?
Mode-S code AA03BF 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 AA03BF broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 21:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA03BF, octal 52401677, decimal 11,142,079.
What flights does AA03BF operate?
Mode-S AA03BF has broadcast 1 distinct callsign, including N7440A.