Apparatus

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sensors Mode-S transponder

40345F

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-TECC · BELLANCA 7 Champion

Hex
40345F
Octal
20032137
Decimal
4,207,711
Country
GB
Tail
G-TECC
Type
CH7A
No current signal · last broadcast 3h ago
Flights observed
47
Distinct callsigns
1
Country
GB
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 40345F.

Country allocation

The ICAO 24-bit address 40345F 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
GTECC - 47 2026-07-18

Recent flights last 47

DateFlightRouteTakeoffLandingDuration
2026-07-18 GTECC - Jul 18, 14:55 UTCJul 18, 16:20 UTC1h 25m
2026-07-18 GTECC - Jul 18, 08:50 UTCJul 18, 10:10 UTC1h 20m
2026-07-17 GTECC - Jul 17, 14:35 UTCJul 17, 14:50 UTC15m
2026-07-17 GTECC - Jul 17, 13:35 UTCJul 17, 13:55 UTC20m
2026-07-10 GTECC - Jul 10, 16:00 UTCJul 10, 16:20 UTC20m
2026-07-10 GTECC - Jul 10, 07:45 UTCJul 10, 08:15 UTC30m
2026-07-08 GTECC - Jul 8, 10:50 UTCJul 8, 11:50 UTC1h 0m
2026-07-06 GTECC - Jul 6, 14:30 UTCJul 6, 14:55 UTC25m
2026-07-05 GTECC - Jul 5, 17:35 UTCJul 5, 18:35 UTC1h 0m
2026-07-05 GTECC - Jul 5, 13:20 UTCJul 5, 15:35 UTC2h 15m
2026-07-03 GTECC - Jul 3, 15:05 UTCJul 3, 15:40 UTC35m
2026-07-03 GTECC - Jul 3, 11:10 UTCJul 3, 13:25 UTC2h 15m
2026-07-01 GTECC - Jul 1, 09:20 UTCJul 1, 10:35 UTC1h 15m
2026-06-29 GTECC - Jun 29, 12:45 UTCJun 29, 13:59 UTC1h 15m
2026-06-26 GTECC - Jun 26, 09:59 UTCJun 26, 10:25 UTC25m
2026-06-24 GTECC - Jun 24, 13:20 UTCJun 24, 14:04 UTC45m
2026-06-24 GTECC - Jun 24, 09:29 UTCJun 24, 10:14 UTC45m
2026-06-21 GTECC - Jun 21, 14:05 UTCJun 21, 15:44 UTC1h 40m
2026-06-21 GTECC - Jun 21, 10:04 UTCJun 21, 11:49 UTC1h 45m
2026-06-20 GTECC - Jun 20, 13:14 UTCJun 20, 13:44 UTC30m
2026-06-18 GTECC - Jun 18, 10:05 UTCJun 18, 11:35 UTC1h 30m
2026-06-15 GTECC - Jun 15, 13:40 UTCJun 15, 14:45 UTC1h 5m
2026-06-14 GTECC - Jun 14, 11:50 UTCJun 14, 12:50 UTC1h 0m
2026-06-13 GTECC - Jun 13, 13:55 UTCJun 13, 15:00 UTC1h 5m
2026-06-13 GTECC - Jun 13, 10:40 UTCJun 13, 11:35 UTC55m
2026-06-12 GTECC - Jun 12, 13:35 UTCJun 12, 14:01 UTC25m
2026-05-30 GTECC - May 30, 13:35 UTCMay 30, 14:05 UTC30m
2026-05-29 GTECC - May 29, 16:25 UTCMay 29, 18:35 UTC2h 10m
2026-05-29 GTECC - May 29, 13:00 UTCMay 29, 15:20 UTC2h 20m
2026-05-29 GTECC - May 29, 09:55 UTCMay 29, 12:05 UTC2h 10m
2026-05-29 GTECC - May 29, 06:25 UTCMay 29, 08:45 UTC2h 20m
2026-05-24 GTECC - May 24, 08:55 UTCMay 24, 11:00 UTC2h 5m
2026-05-22 GTECC - May 22, 13:15 UTCMay 22, 14:35 UTC1h 20m
2026-05-21 GTECC - May 21, 08:30 UTCMay 21, 09:05 UTC35m
2026-05-16 GTECC - May 16, 10:01 UTCMay 16, 11:21 UTC1h 20m
2026-05-12 GTECC - May 12, 13:20 UTCMay 12, 14:10 UTC50m
2026-05-08 GTECC - May 8, 11:55 UTCMay 8, 13:00 UTC1h 5m
2026-05-07 GTECC - May 7, 12:20 UTCMay 7, 13:35 UTC1h 15m
2026-05-04 GTECC - May 4, 13:45 UTCMay 4, 14:30 UTC45m
2026-05-01 GTECC - May 1, 11:15 UTCMay 1, 12:35 UTC1h 20m
2026-04-27 GTECC - Apr 27, 12:35 UTCApr 27, 13:25 UTC50m
2026-04-25 GTECC - Apr 25, 14:40 UTCApr 25, 16:15 UTC1h 35m
2026-04-25 GTECC - Apr 25, 09:10 UTCApr 25, 10:50 UTC1h 40m
2026-04-24 GTECC - Apr 24, 12:30 UTCApr 24, 13:20 UTC50m
2026-04-19 GTECC - Apr 19, 14:20 UTCApr 19, 15:40 UTC1h 20m
2026-04-18 GTECC - Apr 18, 12:35 UTCApr 18, 13:25 UTC50m
2026-04-14 GTECC - Apr 14, 09:10 UTCApr 14, 10:00 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 G-TECC page for operator, model, and routing details .

Mode-S 40345F frequently asked

What is Mode-S code 40345F?
40345F is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-TECC.
Where is Mode-S 40345F registered?
Mode-S code 40345F 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 40345F broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 40345F, octal 20032137, decimal 4,207,711.
What flights does 40345F operate?
Mode-S 40345F has broadcast 1 distinct callsign, including GTECC.