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sensors Mode-S transponder

424B12

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to M-CDBM · BEECH 200 Super King Air

Hex
424B12
Octal
20445422
Decimal
4,344,594
Country
GB
Tail
M-CDBM
Type
BE20
No current signal · last broadcast Jul 22, 17:15 UTC
Flights observed
185
Distinct callsigns
10
Country
GB
Last broadcast
Jul 22, 17:15 UTC

Last known position

Most recent position reported by Mode-S 424B12.

Country allocation

The ICAO 24-bit address 424B12 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 10 distinct

Callsign Airline Flights Last seen
VSB01 - 41 2026-07-16
VSB06 - 40 2026-07-01
VSB08 - 34 2026-07-22
VSB03 - 26 2026-07-20
VSB02 - 16 2026-06-29
VSB07 - 14 2026-06-24
VSB11 - 6 2026-07-20
VSB05 - 4 2026-04-17
VSB12 - 2 2026-07-17
VSB10 - 2 2026-04-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-22 VSB08 EMA → BWF Jul 22, 16:45 UTCJul 22, 17:15 UTC30m
2026-07-22 VSB08 - Jul 22, 15:35 UTCJul 22, 16:10 UTC35m
2026-07-20 VSB11 - Jul 20, 10:25 UTCJul 20, 11:40 UTC1h 15m
2026-07-20 VSB03 - Jul 20, 08:05 UTCJul 20, 08:35 UTC30m
2026-07-20 VSB03 - Jul 20, 07:00 UTCJul 20, 07:30 UTC30m
2026-07-17 VSB12 BQH → BWF Jul 17, 05:50 UTCJul 17, 06:50 UTC1h 0m
2026-07-16 VSB12 BWF → BQH Jul 16, 14:45 UTCJul 16, 15:55 UTC1h 10m
2026-07-16 VSB01 - Jul 16, 08:25 UTCJul 16, 09:20 UTC55m
2026-07-16 VSB01 - Jul 16, 06:50 UTCJul 16, 07:45 UTC55m
2026-07-15 VSB01 FAB → BWF Jul 15, 08:35 UTCJul 15, 09:35 UTC1h 0m
2026-07-15 VSB01 - Jul 15, 06:50 UTCJul 15, 07:50 UTC1h 0m
2026-07-14 VSB08 - Jul 14, 16:40 UTCJul 14, 17:10 UTC30m
2026-07-14 VSB08 BWF → EMA Jul 14, 15:30 UTCJul 14, 16:05 UTC35m
2026-07-14 VSB01 - Jul 14, 08:30 UTCJul 14, 09:25 UTC55m
2026-07-14 VSB01 - Jul 14, 06:50 UTCJul 14, 07:50 UTC1h 0m
2026-07-13 VSB01 - Jul 13, 08:30 UTCJul 13, 09:30 UTC1h 0m
2026-07-13 VSB01 - Jul 13, 06:55 UTCJul 13, 07:45 UTC50m
2026-07-09 VSB01 - Jul 9, 09:05 UTCJul 9, 10:00 UTC55m
2026-07-09 VSB01 - Jul 9, 06:55 UTCJul 9, 07:55 UTC1h 0m
2026-07-08 VSB03 - Jul 8, 08:25 UTCJul 8, 09:00 UTC35m
2026-07-08 VSB03 - Jul 8, 07:20 UTCJul 8, 07:55 UTC35m
2026-07-07 VSB01 - Jul 7, 08:20 UTCJul 7, 09:20 UTC1h 0m
2026-07-07 VSB01 - Jul 7, 06:45 UTCJul 7, 07:40 UTC55m
2026-07-06 VSB01 - Jul 6, 06:50 UTCJul 6, 09:15 UTC2h 25m
2026-07-02 VSB08 - Jul 2, 17:20 UTCJul 2, 18:05 UTC45m
2026-07-02 VSB08 - Jul 2, 16:10 UTCJul 2, 16:45 UTC35m
2026-07-01 VSB06 - Jul 1, 17:35 UTCJul 1, 18:40 UTC1h 5m
2026-07-01 VSB06 - Jul 1, 16:05 UTCJul 1, 16:55 UTC50m
2026-06-30 VSB08 EMA → BWF Jun 30, 16:40 UTCJun 30, 17:15 UTC35m
2026-06-30 VSB08 - Jun 30, 15:40 UTCJun 30, 16:10 UTC30m
2026-06-30 VSB01 - Jun 30, 08:30 UTCJun 30, 09:25 UTC55m
2026-06-30 VSB01 - Jun 30, 06:55 UTCJun 30, 07:50 UTC55m
2026-06-29 VSB02 - Jun 29, 08:14 UTCJun 29, 09:00 UTC45m
2026-06-29 VSB02 - Jun 29, 06:34 UTCJun 29, 07:25 UTC50m
2026-06-25 VSB08 EMA → BWF Jun 25, 17:05 UTCJun 25, 17:34 UTC30m
2026-06-25 VSB08 BWF → EMA Jun 25, 15:40 UTCJun 25, 16:14 UTC35m
2026-06-24 VSB07 BRS → BWF Jun 24, 17:40 UTCJun 24, 18:25 UTC45m
2026-06-24 VSB07 BWF → BRS Jun 24, 16:29 UTCJun 24, 17:14 UTC45m
2026-06-24 VSB02 - Jun 24, 07:44 UTCJun 24, 08:30 UTC45m
2026-06-24 VSB02 - Jun 24, 06:35 UTCJun 24, 07:20 UTC45m
2026-06-23 VSB06 - Jun 23, 16:59 UTCJun 23, 17:54 UTC55m
2026-06-23 VSB06 - Jun 23, 15:24 UTCJun 23, 16:20 UTC55m
2026-06-23 VSB03 - Jun 23, 08:20 UTCJun 23, 08:59 UTC40m
2026-06-23 VSB03 - Jun 23, 07:05 UTCJun 23, 07:35 UTC30m
2026-06-22 VSB01 - Jun 22, 09:00 UTCJun 22, 10:00 UTC1h 0m
2026-06-22 VSB01 - Jun 22, 06:54 UTCJun 22, 07:49 UTC55m
2026-06-19 VSB07 BRS → BWF Jun 19, 13:34 UTCJun 19, 14:19 UTC45m
2026-06-19 VSB07 - Jun 19, 12:09 UTCJun 19, 13:04 UTC55m
2026-06-18 VSB07 - Jun 18, 16:35 UTCJun 18, 17:15 UTC40m
2026-06-18 VSB07 BWF → BRS Jun 18, 15:05 UTCJun 18, 15:55 UTC50m

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 M-CDBM page for operator, model, and routing details .

Mode-S 424B12 frequently asked

What is Mode-S code 424B12?
424B12 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to M-CDBM.
Where is Mode-S 424B12 registered?
Mode-S code 424B12 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 424B12 broadcasting right now?
No active broadcast right now. Last signal was Jul 22, 17:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 424B12, octal 20445422, decimal 4,344,594.
What flights does 424B12 operate?
Mode-S 424B12 has broadcast 10 distinct callsigns, including VSB01, VSB06, VSB08, VSB03, VSB02.