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sensors Mode-S transponder

40413D

ICAO 24-bit transponder address · allocated to United Kingdom

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

Hex
40413D
Octal
20040475
Decimal
4,211,005
Country
GB
Tail
G-EKKL
Type
P28A
No current signal · last broadcast 21h ago
Flights observed
81
Distinct callsigns
1
Country
GB
Last broadcast
21h ago

Last known position

Most recent position reported by Mode-S 40413D.

Country allocation

The ICAO 24-bit address 40413D 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
GEKKL - 81 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 GEKKL - Jul 13, 10:35 UTCJul 13, 13:35 UTC3h 0m
2026-07-12 GEKKL PSL → PSL Jul 12, 13:35 UTCJul 12, 15:30 UTC1h 55m
2026-07-12 GEKKL PSL → PSL Jul 12, 10:01 UTCJul 12, 12:55 UTC2h 55m
2026-07-08 GEKKL - Jul 8, 15:25 UTCJul 8, 16:00 UTC35m
2026-07-08 GEKKL - Jul 8, 13:25 UTCJul 8, 14:05 UTC40m
2026-07-08 GEKKL - Jul 8, 12:10 UTCJul 8, 12:50 UTC40m
2026-07-08 GEKKL - Jul 8, 09:50 UTCJul 8, 10:35 UTC45m
2026-07-07 GEKKL PSL → PSL Jul 7, 13:10 UTCJul 7, 14:20 UTC1h 10m
2026-07-07 GEKKL - Jul 7, 09:45 UTCJul 7, 11:20 UTC1h 35m
2026-07-06 GEKKL - Jul 6, 14:25 UTCJul 6, 14:55 UTC30m
2026-07-06 GEKKL - Jul 6, 11:50 UTCJul 6, 13:55 UTC2h 5m
2026-07-03 GEKKL PSL → PSL Jul 3, 12:40 UTCJul 3, 13:45 UTC1h 5m
2026-07-02 GEKKL - Jul 2, 12:30 UTCJul 2, 13:35 UTC1h 5m
2026-07-02 GEKKL PSL → PSL Jul 2, 10:15 UTCJul 2, 11:05 UTC50m
2026-06-29 GEKKL - Jun 29, 14:09 UTCJun 29, 15:19 UTC1h 10m
2026-06-28 GEKKL - Jun 28, 13:00 UTCJun 28, 13:49 UTC50m
2026-06-28 GEKKL - Jun 28, 10:35 UTCJun 28, 11:35 UTC1h 0m
2026-06-28 GEKKL - Jun 28, 08:55 UTCJun 28, 09:15 UTC20m
2026-06-27 GEKKL - Jun 27, 11:04 UTCJun 27, 11:55 UTC50m
2026-06-27 GEKKL - Jun 27, 08:35 UTCJun 27, 09:24 UTC50m
2026-06-25 GEKKL - Jun 25, 15:29 UTCJun 25, 16:20 UTC50m
2026-06-25 GEKKL - Jun 25, 13:50 UTCJun 25, 14:39 UTC50m
2026-06-25 GEKKL - Jun 25, 10:15 UTCJun 25, 12:40 UTC2h 25m
2026-06-24 GEKKL PSL → PSL Jun 24, 15:00 UTCJun 24, 15:29 UTC30m
2026-06-24 GEKKL PSL → PSL Jun 24, 13:05 UTCJun 24, 14:04 UTC1h 0m
2026-06-24 GEKKL PSL → PSL Jun 24, 10:04 UTCJun 24, 10:55 UTC50m
2026-06-23 GEKKL - Jun 23, 16:39 UTCJun 23, 17:30 UTC50m
2026-06-23 GEKKL - Jun 23, 13:59 UTCJun 23, 15:04 UTC1h 5m
2026-06-23 GEKKL PSL → PSL Jun 23, 10:55 UTCJun 23, 11:49 UTC55m
2026-06-21 GEKKL - Jun 21, 13:00 UTCJun 21, 13:50 UTC50m
2026-06-21 GEKKL - Jun 21, 10:40 UTCJun 21, 11:24 UTC45m
2026-06-20 GEKKL - Jun 20, 14:44 UTCJun 20, 15:39 UTC55m
2026-06-20 GEKKL - Jun 20, 09:39 UTCJun 20, 12:30 UTC2h 50m
2026-06-17 GEKKL - Jun 17, 14:20 UTCJun 17, 15:20 UTC1h 0m
2026-06-17 GEKKL PSL → PSL Jun 17, 10:40 UTCJun 17, 13:05 UTC2h 25m
2026-06-15 GEKKL PSL → PSL Jun 15, 15:15 UTCJun 15, 15:35 UTC20m
2026-06-15 GEKKL PSL → PSL Jun 15, 10:00 UTCJun 15, 11:00 UTC1h 0m
2026-06-14 GEKKL - Jun 14, 15:20 UTCJun 14, 15:50 UTC30m
2026-06-14 GEKKL - Jun 14, 13:30 UTCJun 14, 14:05 UTC35m
2026-06-14 GEKKL - Jun 14, 09:05 UTCJun 14, 11:30 UTC2h 25m
2026-06-12 GEKKL - Jun 12, 10:15 UTCJun 12, 10:55 UTC40m
2026-05-26 GEKKL PSL → PSL May 26, 10:29 UTCMay 26, 11:05 UTC35m
2026-05-25 GEKKL - May 25, 09:40 UTCMay 25, 11:30 UTC1h 50m
2026-05-24 GEKKL - May 24, 16:00 UTCMay 24, 16:25 UTC25m
2026-05-24 GEKKL - May 24, 13:40 UTCMay 24, 14:25 UTC45m
2026-05-24 GEKKL - May 24, 11:35 UTCMay 24, 12:05 UTC30m
2026-05-24 GEKKL - May 24, 08:15 UTCMay 24, 10:45 UTC2h 30m
2026-05-23 GEKKL PSL → PSL May 23, 11:55 UTCMay 23, 14:25 UTC2h 30m
2026-05-23 GEKKL PSL → PSL May 23, 10:00 UTCMay 23, 10:55 UTC55m
2026-05-22 GEKKL - May 22, 10:45 UTCMay 22, 12:20 UTC1h 35m

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-EKKL page for operator, model, and routing details .

Mode-S 40413D frequently asked

What is Mode-S code 40413D?
40413D is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-EKKL.
Where is Mode-S 40413D registered?
Mode-S code 40413D 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 40413D broadcasting right now?
No active broadcast right now. Last signal was 21h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 40413D, octal 20040475, decimal 4,211,005.
What flights does 40413D operate?
Mode-S 40413D has broadcast 1 distinct callsign, including GEKKL.