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sensors Mode-S transponder

43EC3F

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to 2-CLEV · CESSNA 525A Citation CJ2

Hex
43EC3F
Octal
20766077
Decimal
4,451,391
Country
GB
Tail
2-CLEV
Type
C25A
No current signal · last broadcast 1d ago
Flights observed
55
Distinct callsigns
5
Country
GB
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 43EC3F.

Country allocation

The ICAO 24-bit address 43EC3F 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 5 distinct

Callsign Airline Flights Last seen
CRX9A - 27 2026-07-20
CRX9B - 20 2026-07-22
CRX9C - 4 2026-07-21
CRX8A - 3 2026-07-10
CRX8B - 1 2026-06-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-22 CRX9B - Jul 22, 15:55 UTCJul 22, 16:55 UTC1h 0m
2026-07-21 CRX9B - Jul 21, 15:30 UTCJul 21, 16:35 UTC1h 5m
2026-07-21 CRX9C - Jul 21, 11:10 UTCJul 21, 11:40 UTC30m
2026-07-20 CRX9C - Jul 20, 15:45 UTCJul 20, 16:20 UTC35m
2026-07-20 CRX9B - Jul 20, 07:45 UTCJul 20, 08:15 UTC30m
2026-07-20 CRX9A - Jul 20, 06:10 UTCJul 20, 07:10 UTC1h 0m
2026-07-15 CRX9B - Jul 15, 16:05 UTCJul 15, 17:05 UTC1h 0m
2026-07-15 CRX9A BOH → OXF Jul 15, 15:10 UTCJul 15, 15:30 UTC20m
2026-07-13 CRX9C - Jul 13, 17:20 UTCJul 13, 18:20 UTC1h 0m
2026-07-13 CRX9B - Jul 13, 15:50 UTCJul 13, 16:45 UTC55m
2026-07-13 CRX9A - Jul 13, 06:05 UTCJul 13, 07:10 UTC1h 5m
2026-07-10 CRX9B - Jul 10, 16:05 UTCJul 10, 17:05 UTC1h 0m
2026-07-10 CRX8A - Jul 10, 06:15 UTCJul 10, 07:15 UTC1h 0m
2026-07-08 CRX9B - Jul 8, 16:00 UTCJul 8, 17:00 UTC1h 0m
2026-07-08 CRX9A KIR → OXF Jul 8, 06:00 UTCJul 8, 07:05 UTC1h 5m
2026-07-06 CRX9B - Jul 6, 15:55 UTCJul 6, 16:55 UTC1h 0m
2026-07-06 CRX9A - Jul 6, 06:05 UTCJul 6, 06:55 UTC50m
2026-07-05 CRX9A - Jul 5, 13:50 UTCJul 5, 14:50 UTC1h 0m
2026-06-22 CRX9B - Jun 22, 15:35 UTCJun 22, 18:00 UTC2h 25m
2026-06-22 CRX9A - Jun 22, 06:10 UTCJun 22, 07:04 UTC55m
2026-06-19 CRX9B - Jun 19, 15:54 UTCJun 19, 16:59 UTC1h 5m
2026-06-19 CRX9A - Jun 19, 06:59 UTCJun 19, 07:59 UTC1h 0m
2026-06-18 CRX9A - Jun 18, 10:30 UTCJun 18, 11:35 UTC1h 5m
2026-06-17 CRX9A - Jun 17, 06:15 UTCJun 17, 07:15 UTC1h 0m
2026-06-15 CRX9B - Jun 15, 15:59 UTCJun 15, 16:59 UTC1h 0m
2026-06-15 CRX9B - Jun 15, 06:04 UTCJun 15, 07:05 UTC1h 0m
2026-06-12 CRX9B - Jun 12, 15:45 UTCJun 12, 16:50 UTC1h 5m
2026-06-12 CRX9A - Jun 12, 06:15 UTCJun 12, 07:10 UTC55m
2026-06-10 CRX9B - Jun 10, 16:05 UTCJun 10, 17:15 UTC1h 10m
2026-06-10 CRX9A - Jun 10, 06:05 UTCJun 10, 07:00 UTC55m
2026-06-09 CRX9A - Jun 9, 12:20 UTCJun 9, 13:15 UTC55m
2026-06-09 CRX9A - Jun 9, 07:20 UTCJun 9, 08:15 UTC55m
2026-06-08 CRX9B - Jun 8, 16:10 UTCJun 8, 17:10 UTC1h 0m
2026-06-08 CRX9A - Jun 8, 15:10 UTCJun 8, 15:20 UTC10m
2026-06-08 CRX8A - Jun 8, 06:15 UTCJun 8, 07:15 UTC1h 0m
2026-06-05 CRX8B - Jun 5, 16:20 UTCJun 5, 17:30 UTC1h 10m
2026-06-05 CRX8A - Jun 5, 06:15 UTCJun 5, 07:20 UTC1h 5m
2026-06-03 CRX9B - Jun 3, 16:00 UTCJun 3, 17:10 UTC1h 10m
2026-06-03 CRX9A - Jun 3, 06:10 UTCJun 3, 07:00 UTC50m
2026-05-15 CRX9B - May 15, 16:00 UTCMay 15, 17:00 UTC1h 0m
2026-05-15 CRX9A - May 15, 06:10 UTCMay 15, 07:10 UTC1h 0m
2026-04-30 CRX9A - Apr 30, 08:05 UTCApr 30, 09:15 UTC1h 10m
2026-04-29 CRX9A - Apr 29, 13:30 UTCApr 29, 14:00 UTC30m
2026-04-29 CRX9A - Apr 29, 06:05 UTCApr 29, 07:10 UTC1h 5m
2026-04-28 CRX9C - Apr 28, 16:00 UTCApr 28, 17:00 UTC1h 0m
2026-04-28 CRX9A - Apr 28, 11:05 UTCApr 28, 11:45 UTC40m
2026-04-28 CRX9A - Apr 28, 06:55 UTCApr 28, 07:40 UTC45m
2026-04-27 CRX9A - Apr 27, 16:05 UTCApr 27, 17:05 UTC1h 0m
2026-04-27 CRX9A - Apr 27, 06:15 UTCApr 27, 07:20 UTC1h 5m
2026-04-24 CRX9B - Apr 24, 16:05 UTCApr 24, 17:10 UTC1h 5m

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 2-CLEV page for operator, model, and routing details .

Mode-S 43EC3F frequently asked

What is Mode-S code 43EC3F?
43EC3F is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to 2-CLEV.
Where is Mode-S 43EC3F registered?
Mode-S code 43EC3F 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 43EC3F broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 43EC3F, octal 20766077, decimal 4,451,391.
What flights does 43EC3F operate?
Mode-S 43EC3F has broadcast 5 distinct callsigns, including CRX9A, CRX9B, CRX9C, CRX8A, CRX8B.