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sensors Mode-S transponder

40216D

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-CLEA · PIPER PA-28-140/150/160/180

Hex
40216D
Octal
20020555
Decimal
4,202,861
Country
GB
Tail
G-CLEA
Type
P28A
No current signal · last broadcast Jul 25, 11:25 UTC
Flights observed
130
Distinct callsigns
1
Country
GB
Last broadcast
Jul 25, 11:25 UTC

Last known position

Most recent position reported by Mode-S 40216D.

Country allocation

The ICAO 24-bit address 40216D 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
GCLEA - 130 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 GCLEA GBA → GBA Jul 25, 10:30 UTCJul 25, 11:25 UTC55m
2026-07-24 GCLEA - Jul 24, 14:20 UTCJul 24, 15:00 UTC40m
2026-07-24 GCLEA - Jul 24, 12:35 UTCJul 24, 13:20 UTC45m
2026-07-24 GCLEA - Jul 24, 10:35 UTCJul 24, 11:10 UTC35m
2026-07-24 GCLEA GBA → GBA Jul 24, 08:30 UTCJul 24, 09:40 UTC1h 10m
2026-07-18 GCLEA GBA → GBA Jul 18, 09:05 UTCJul 18, 11:00 UTC1h 55m
2026-07-17 GCLEA - Jul 17, 10:44 UTCJul 17, 11:30 UTC45m
2026-07-17 GCLEA - Jul 17, 08:35 UTCJul 17, 09:40 UTC1h 5m
2026-07-16 GCLEA - Jul 16, 09:05 UTCJul 16, 11:10 UTC2h 5m
2026-07-15 GCLEA - Jul 15, 11:55 UTCJul 15, 12:30 UTC35m
2026-07-15 GCLEA - Jul 15, 11:05 UTCJul 15, 11:50 UTC45m
2026-07-15 GCLEA GBA → GBA Jul 15, 09:30 UTCJul 15, 10:15 UTC45m
2026-07-15 GCLEA GBA → GBA Jul 15, 09:00 UTCJul 15, 09:10 UTC10m
2026-07-13 GCLEA GBA → GBA Jul 13, 14:35 UTCJul 13, 15:35 UTC1h 0m
2026-07-13 GCLEA GBA → GBA Jul 13, 11:00 UTCJul 13, 11:30 UTC30m
2026-07-13 GCLEA - Jul 13, 08:55 UTCJul 13, 09:55 UTC1h 0m
2026-07-11 GCLEA - Jul 11, 09:00 UTCJul 11, 10:10 UTC1h 10m
2026-07-10 GCLEA - Jul 10, 13:55 UTCJul 10, 14:40 UTC45m
2026-07-02 GCLEA GBA → GBA Jul 2, 14:40 UTCJul 2, 15:30 UTC50m
2026-07-02 GCLEA - Jul 2, 11:25 UTCJul 2, 13:10 UTC1h 45m
2026-07-02 GCLEA GBA → GBA Jul 2, 09:15 UTCJul 2, 10:30 UTC1h 15m
2026-07-02 GCLEA GBA → GBA Jul 2, 08:45 UTCJul 2, 09:10 UTC25m
2026-07-01 GCLEA GBA → GBA Jul 1, 14:30 UTCJul 1, 16:05 UTC1h 35m
2026-07-01 GCLEA - Jul 1, 13:05 UTCJul 1, 14:00 UTC55m
2026-07-01 GCLEA - Jul 1, 11:00 UTCJul 1, 11:55 UTC55m
2026-07-01 GCLEA GBA → GBA Jul 1, 08:30 UTCJul 1, 09:55 UTC1h 25m
2026-06-30 GCLEA - Jun 30, 14:50 UTCJun 30, 15:45 UTC55m
2026-06-30 GCLEA - Jun 30, 12:50 UTCJun 30, 13:50 UTC1h 0m
2026-06-30 GCLEA GBA → GBA Jun 30, 10:55 UTCJun 30, 11:50 UTC55m
2026-06-30 GCLEA GBA → GBA Jun 30, 09:15 UTCJun 30, 10:15 UTC1h 0m
2026-06-25 GCLEA GBA → GBA Jun 25, 11:44 UTCJun 25, 13:50 UTC2h 5m
2026-06-25 GCLEA GBA → GBA Jun 25, 10:04 UTCJun 25, 10:59 UTC55m
2026-06-25 GCLEA GBA → GBA Jun 25, 08:20 UTCJun 25, 09:14 UTC55m
2026-06-23 GCLEA GBA → GBA Jun 23, 14:15 UTCJun 23, 15:04 UTC50m
2026-06-23 GCLEA GBA → GBA Jun 23, 12:25 UTCJun 23, 13:29 UTC1h 5m
2026-06-23 GCLEA GBA → GBA Jun 23, 10:24 UTCJun 23, 11:24 UTC1h 0m
2026-06-23 GCLEA GBA → GBA Jun 23, 09:29 UTCJun 23, 09:54 UTC25m
2026-06-23 GCLEA - Jun 23, 08:59 UTCJun 23, 09:24 UTC25m
2026-06-22 GCLEA - Jun 22, 13:59 UTCJun 22, 15:24 UTC1h 25m
2026-06-22 GCLEA - Jun 22, 12:25 UTCJun 22, 13:19 UTC55m
2026-06-21 GCLEA - Jun 21, 12:40 UTCJun 21, 13:29 UTC50m
2026-06-21 GCLEA - Jun 21, 10:44 UTCJun 21, 11:30 UTC45m
2026-06-21 GCLEA - Jun 21, 08:54 UTCJun 21, 09:49 UTC55m
2026-06-20 GCLEA - Jun 20, 11:05 UTCJun 20, 12:04 UTC1h 0m
2026-06-20 GCLEA GBA → GBA Jun 20, 08:05 UTCJun 20, 08:14 UTC10m
2026-06-19 GCLEA GBA → GBA Jun 19, 14:19 UTCJun 19, 15:09 UTC50m
2026-06-19 GCLEA - Jun 19, 12:34 UTCJun 19, 13:24 UTC50m
2026-06-19 GCLEA GBA → GBA Jun 19, 08:54 UTCJun 19, 11:04 UTC2h 10m
2026-06-16 GCLEA GBA → GBA Jun 16, 12:30 UTCJun 16, 13:15 UTC45m
2026-06-15 GCLEA - Jun 15, 10:00 UTCJun 15, 10:20 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 G-CLEA page for operator, model, and routing details .

Mode-S 40216D frequently asked

What is Mode-S code 40216D?
40216D is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-CLEA.
Where is Mode-S 40216D registered?
Mode-S code 40216D 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 40216D broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 11:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 40216D, octal 20020555, decimal 4,202,861.
What flights does 40216D operate?
Mode-S 40216D has broadcast 1 distinct callsign, including GCLEA.