Apparatus

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sensors Mode-S transponder

407BBA

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-CMAK · CESSNA 152

Hex
407BBA
Octal
20075672
Decimal
4,225,978
Country
GB
Tail
G-CMAK
Type
C152
No current signal · last broadcast 15d ago
Flights observed
198
Distinct callsigns
1
Country
GB
Last broadcast
15d ago

Last known position

Most recent position reported by Mode-S 407BBA.

Country allocation

The ICAO 24-bit address 407BBA falls within the block assigned to United Kingdom (GB) by ICAO Annex 10, Volume III. Every aircraft registered in United Kingdom 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
GCMAK - 198 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 GCMAK - Jul 26, 14:55 UTCJul 26, 16:00 UTC1h 5m
2026-07-26 GCMAK - Jul 26, 11:20 UTCJul 26, 12:05 UTC45m
2026-07-26 GCMAK - Jul 26, 09:15 UTCJul 26, 10:25 UTC1h 10m
2026-07-25 GCMAK - Jul 25, 16:50 UTCJul 25, 17:40 UTC50m
2026-07-25 GCMAK - Jul 25, 14:35 UTCJul 25, 15:30 UTC55m
2026-07-25 GCMAK - Jul 25, 12:25 UTCJul 25, 13:10 UTC45m
2026-07-25 GCMAK - Jul 25, 10:45 UTCJul 25, 11:25 UTC40m
2026-07-24 GCMAK - Jul 24, 15:00 UTCJul 24, 16:20 UTC1h 20m
2026-07-24 GCMAK - Jul 24, 12:40 UTCJul 24, 13:35 UTC55m
2026-07-24 GCMAK - Jul 24, 09:55 UTCJul 24, 10:45 UTC50m
2026-07-24 GCMAK - Jul 24, 08:10 UTCJul 24, 08:50 UTC40m
2026-07-23 GCMAK - Jul 23, 14:40 UTCJul 23, 15:50 UTC1h 10m
2026-07-23 GCMAK - Jul 23, 10:25 UTCJul 23, 10:50 UTC25m
2026-07-23 GCMAK - Jul 23, 09:05 UTCJul 23, 09:45 UTC40m
2026-07-22 GCMAK - Jul 22, 17:00 UTCJul 22, 18:35 UTC1h 35m
2026-07-21 GCMAK - Jul 21, 14:40 UTCJul 21, 15:50 UTC1h 10m
2026-07-21 GCMAK - Jul 21, 13:00 UTCJul 21, 13:50 UTC50m
2026-07-21 GCMAK - Jul 21, 10:35 UTCJul 21, 11:40 UTC1h 5m
2026-07-21 GCMAK - Jul 21, 08:55 UTCJul 21, 09:25 UTC30m
2026-07-20 GCMAK - Jul 20, 15:05 UTCJul 20, 15:40 UTC35m
2026-07-20 GCMAK - Jul 20, 08:40 UTCJul 20, 10:00 UTC1h 20m
2026-07-19 GCMAK - Jul 19, 14:10 UTCJul 19, 15:15 UTC1h 5m
2026-07-19 GCMAK - Jul 19, 12:30 UTCJul 19, 13:25 UTC55m
2026-07-19 GCMAK - Jul 19, 10:25 UTCJul 19, 11:05 UTC40m
2026-07-19 GCMAK - Jul 19, 08:50 UTCJul 19, 09:25 UTC35m
2026-07-18 GCMAK - Jul 18, 17:45 UTCJul 18, 18:25 UTC40m
2026-07-18 GCMAK - Jul 18, 14:25 UTCJul 18, 15:05 UTC40m
2026-07-18 GCMAK - Jul 18, 12:25 UTCJul 18, 13:15 UTC50m
2026-07-18 GCMAK - Jul 18, 10:15 UTCJul 18, 11:05 UTC50m
2026-07-18 GCMAK - Jul 18, 08:30 UTCJul 18, 09:10 UTC40m
2026-07-17 GCMAK - Jul 17, 16:55 UTCJul 17, 17:40 UTC45m
2026-07-17 GCMAK - Jul 17, 15:15 UTCJul 17, 15:44 UTC30m
2026-07-17 GCMAK - Jul 17, 11:10 UTCJul 17, 11:55 UTC45m
2026-07-17 GCMAK - Jul 17, 08:35 UTCJul 17, 09:20 UTC45m
2026-07-16 GCMAK - Jul 16, 17:20 UTCJul 16, 18:10 UTC50m
2026-07-16 GCMAK - Jul 16, 14:55 UTCJul 16, 16:15 UTC1h 20m
2026-07-16 GCMAK - Jul 16, 13:25 UTCJul 16, 14:10 UTC45m
2026-07-16 GCMAK - Jul 16, 11:34 UTCJul 16, 11:50 UTC15m
2026-07-14 GCMAK - Jul 14, 15:40 UTCJul 14, 16:20 UTC40m
2026-07-14 GCMAK - Jul 14, 13:25 UTCJul 14, 14:10 UTC45m
2026-07-14 GCMAK - Jul 14, 10:55 UTCJul 14, 11:30 UTC35m
2026-07-13 GCMAK - Jul 13, 14:15 UTCJul 13, 15:00 UTC45m
2026-07-13 GCMAK - Jul 13, 11:10 UTCJul 13, 11:55 UTC45m
2026-07-13 GCMAK - Jul 13, 08:55 UTCJul 13, 09:40 UTC45m
2026-07-12 GCMAK - Jul 12, 13:40 UTCJul 12, 14:20 UTC40m
2026-07-12 GCMAK - Jul 12, 11:35 UTCJul 12, 12:10 UTC35m
2026-07-12 GCMAK - Jul 12, 08:35 UTCJul 12, 09:35 UTC1h 0m
2026-07-11 GCMAK - Jul 11, 17:15 UTCJul 11, 18:10 UTC55m
2026-07-11 GCMAK - Jul 11, 14:25 UTCJul 11, 15:25 UTC1h 0m
2026-07-11 GCMAK - Jul 11, 12:30 UTCJul 11, 13:30 UTC1h 0m

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 G-CMAK page for operator, model, and routing details .

Mode-S 407BBA frequently asked

What is Mode-S code 407BBA?
407BBA is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-CMAK.
Where is Mode-S 407BBA registered?
Mode-S code 407BBA is allocated to United Kingdom (GB). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 407BBA broadcasting right now?
No active broadcast right now. Last signal was 15d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 407BBA, octal 20075672, decimal 4,225,978.
What flights does 407BBA operate?
Mode-S 407BBA has broadcast 1 distinct callsign, including GCMAK.