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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 4h ago
Flights observed
104
Distinct callsigns
1
Country
GB
Last broadcast
4h 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 - 104 2026-06-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-26 GCMAK - Jun 26, 11:09 UTCJun 26, 11:49 UTC40m
2026-06-25 GCMAK - Jun 25, 14:55 UTCJun 25, 16:05 UTC1h 10m
2026-06-25 GCMAK - Jun 25, 07:39 UTCJun 25, 09:05 UTC1h 25m
2026-06-24 GCMAK - Jun 24, 10:25 UTCJun 24, 11:14 UTC50m
2026-06-24 GCMAK - Jun 24, 08:30 UTCJun 24, 09:15 UTC45m
2026-06-23 GCMAK - Jun 23, 14:59 UTCJun 23, 16:09 UTC1h 10m
2026-06-23 GCMAK - Jun 23, 12:45 UTCJun 23, 13:45 UTC1h 0m
2026-06-23 GCMAK - Jun 23, 10:19 UTCJun 23, 10:59 UTC40m
2026-06-23 GCMAK - Jun 23, 08:30 UTCJun 23, 09:14 UTC45m
2026-06-22 GCMAK - Jun 22, 16:40 UTCJun 22, 18:00 UTC1h 20m
2026-06-22 GCMAK - Jun 22, 15:20 UTCJun 22, 15:50 UTC30m
2026-06-22 GCMAK - Jun 22, 13:54 UTCJun 22, 14:49 UTC55m
2026-06-20 GCMAK - Jun 20, 12:54 UTCJun 20, 14:54 UTC2h 0m
2026-06-18 GCMAK - Jun 18, 15:35 UTCJun 18, 16:00 UTC25m
2026-06-16 GCMAK - Jun 16, 09:40 UTCJun 16, 09:55 UTC15m
2026-06-15 GCMAK - Jun 15, 12:35 UTCJun 15, 13:20 UTC45m
2026-06-15 GCMAK - Jun 15, 11:00 UTCJun 15, 11:39 UTC40m
2026-06-15 GCMAK - Jun 15, 08:29 UTCJun 15, 09:20 UTC50m
2026-06-14 GCMAK - Jun 14, 16:50 UTCJun 14, 18:20 UTC1h 30m
2026-06-14 GCMAK - Jun 14, 14:35 UTCJun 14, 15:55 UTC1h 20m
2026-06-14 GCMAK - Jun 14, 13:15 UTCJun 14, 14:00 UTC45m
2026-06-14 GCMAK - Jun 14, 11:05 UTCJun 14, 12:00 UTC55m
2026-06-14 GCMAK - Jun 14, 08:25 UTCJun 14, 09:15 UTC50m
2026-06-13 GCMAK - Jun 13, 15:00 UTCJun 13, 16:00 UTC1h 0m
2026-06-13 GCMAK - Jun 13, 12:35 UTCJun 13, 13:25 UTC50m
2026-06-13 GCMAK - Jun 13, 11:05 UTCJun 13, 11:50 UTC45m
2026-06-13 GCMAK - Jun 13, 08:40 UTCJun 13, 10:05 UTC1h 25m
2026-06-12 GCMAK - Jun 12, 17:00 UTCJun 12, 17:40 UTC40m
2026-06-10 GCMAK - Jun 10, 08:20 UTCJun 10, 09:05 UTC45m
2026-06-09 GCMAK - Jun 9, 16:45 UTCJun 9, 17:05 UTC20m
2026-06-09 GCMAK - Jun 9, 14:35 UTCJun 9, 15:25 UTC50m
2026-06-09 GCMAK - Jun 9, 12:55 UTCJun 9, 13:55 UTC1h 0m
2026-06-09 GCMAK - Jun 9, 10:35 UTCJun 9, 11:15 UTC40m
2026-06-09 GCMAK - Jun 9, 08:20 UTCJun 9, 09:05 UTC45m
2026-06-07 GCMAK - Jun 7, 16:35 UTCJun 7, 17:15 UTC40m
2026-06-07 GCMAK - Jun 7, 14:30 UTCJun 7, 15:15 UTC45m
2026-06-07 GCMAK - Jun 7, 13:00 UTCJun 7, 13:50 UTC50m
2026-06-07 GCMAK - Jun 7, 10:25 UTCJun 7, 11:15 UTC50m
2026-06-07 GCMAK - Jun 7, 08:20 UTCJun 7, 09:10 UTC50m
2026-06-05 GCMAK - Jun 5, 12:10 UTCJun 5, 12:55 UTC45m
2026-06-01 GCMAK - Jun 1, 13:05 UTCJun 1, 13:45 UTC40m
2026-06-01 GCMAK - Jun 1, 09:40 UTCJun 1, 10:00 UTC20m
2026-05-31 GCMAK - May 31, 12:40 UTCMay 31, 13:25 UTC45m
2026-05-31 GCMAK - May 31, 10:50 UTCMay 31, 11:35 UTC45m
2026-05-30 GCMAK - May 30, 13:10 UTCMay 30, 13:55 UTC45m
2026-05-30 GCMAK - May 30, 10:30 UTCMay 30, 11:20 UTC50m
2026-05-30 GCMAK - May 30, 08:35 UTCMay 30, 09:10 UTC35m
2026-05-29 GCMAK - May 29, 14:55 UTCMay 29, 15:35 UTC40m
2026-05-29 GCMAK - May 29, 10:40 UTCMay 29, 12:25 UTC1h 45m
2026-05-29 GCMAK - May 29, 08:20 UTCMay 29, 09:15 UTC55m

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 4h 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.