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sensors Mode-S transponder

4035EC

ICAO 24-bit transponder address · allocated to United Kingdom

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

Hex
4035EC
Octal
20032754
Decimal
4,208,108
Country
GB
Tail
G-BUFH
Type
P28A
No current signal · last broadcast 13h ago
Flights observed
147
Distinct callsigns
1
Country
GB
Last broadcast
13h ago

Last known position

Most recent position reported by Mode-S 4035EC.

Country allocation

The ICAO 24-bit address 4035EC 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
GBUFH - 120 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 GBUFH - Jul 13, 12:40 UTCJul 13, 13:15 UTC35m
2026-07-12 GBUFH - Jul 12, 15:50 UTCJul 12, 16:35 UTC45m
2026-07-12 GBUFH - Jul 12, 09:10 UTCJul 12, 09:20 UTC10m
2026-07-11 GBUFH - Jul 11, 16:05 UTCJul 11, 16:40 UTC35m
2026-07-11 GBUFH BOH → BOH Jul 11, 14:50 UTCJul 11, 15:10 UTC20m
2026-07-11 GBUFH - Jul 11, 13:00 UTCJul 11, 13:40 UTC40m
2026-07-11 GBUFH - Jul 11, 11:15 UTCJul 11, 12:00 UTC45m
2026-07-11 GBUFH - Jul 11, 09:10 UTCJul 11, 10:00 UTC50m
2026-07-10 GBUFH - Jul 10, 12:35 UTCJul 10, 13:20 UTC45m
2026-07-10 GBUFH - Jul 10, 11:10 UTCJul 10, 11:25 UTC15m
2026-07-09 GBUFH - Jul 9, 16:25 UTCJul 9, 16:55 UTC30m
2026-07-09 GBUFH - Jul 9, 12:45 UTCJul 9, 13:40 UTC55m
2026-07-09 GBUFH - Jul 9, 09:10 UTCJul 9, 10:15 UTC1h 5m
2026-07-08 GBUFH - Jul 8, 14:25 UTCJul 8, 15:15 UTC50m
2026-07-08 GBUFH - Jul 8, 12:15 UTCJul 8, 13:10 UTC55m
2026-07-08 GBUFH - Jul 8, 09:50 UTCJul 8, 10:40 UTC50m
2026-06-23 - BOH → BOH Jun 23, 15:50 UTCJun 23, 16:59 UTC1h 10m
2026-06-23 - - Jun 23, 13:00 UTCJun 23, 13:45 UTC45m
2026-06-23 - - Jun 23, 10:10 UTCJun 23, 10:39 UTC30m
2026-06-23 - - Jun 23, 08:59 UTCJun 23, 09:14 UTC15m
2026-06-22 - - Jun 22, 13:54 UTCJun 22, 15:05 UTC1h 10m
2026-06-22 - - Jun 22, 08:19 UTCJun 22, 08:44 UTC25m
2026-06-21 - - Jun 21, 15:49 UTCJun 21, 16:39 UTC50m
2026-06-21 - - Jun 21, 14:15 UTCJun 21, 14:54 UTC40m
2026-06-21 - BOH → BOH Jun 21, 11:20 UTCJun 21, 12:10 UTC50m
2026-06-20 - - Jun 20, 17:14 UTCJun 20, 18:04 UTC50m
2026-06-16 - - Jun 16, 14:05 UTCJun 16, 14:50 UTC45m
2026-06-16 - - Jun 16, 11:40 UTCJun 16, 12:25 UTC45m
2026-06-15 - - Jun 15, 12:39 UTCJun 15, 13:34 UTC55m
2026-06-15 - - Jun 15, 09:25 UTCJun 15, 09:45 UTC20m
2026-06-14 - BOH → BOH Jun 14, 13:40 UTCJun 14, 15:05 UTC1h 25m
2026-06-14 - - Jun 14, 09:50 UTCJun 14, 10:25 UTC35m
2026-06-14 - - Jun 14, 06:20 UTCJun 14, 07:50 UTC1h 30m
2026-06-13 - EXT → BOH Jun 13, 13:50 UTCJun 13, 14:30 UTC40m
2026-06-13 - - Jun 13, 11:20 UTCJun 13, 12:55 UTC1h 35m
2026-06-10 - BOH → BOH Jun 10, 14:45 UTCJun 10, 14:55 UTC10m
2026-06-10 - BOH → BOH Jun 10, 13:15 UTCJun 10, 13:55 UTC40m
2026-06-10 - - Jun 10, 10:35 UTCJun 10, 11:15 UTC40m
2026-06-09 - - Jun 9, 15:00 UTCJun 9, 15:40 UTC40m
2026-06-09 - - Jun 9, 12:45 UTCJun 9, 13:25 UTC40m
2026-06-09 - - Jun 9, 10:15 UTCJun 9, 10:55 UTC40m
2026-06-08 - - Jun 8, 15:15 UTCJun 8, 15:50 UTC35m
2026-06-07 - - Jun 7, 10:15 UTCJun 7, 10:30 UTC15m
2026-06-05 GBUFH - Jun 5, 16:05 UTCJun 5, 16:40 UTC35m
2026-06-05 GBUFH - Jun 5, 11:30 UTCJun 5, 12:05 UTC35m
2026-06-01 GBUFH BOH → BOH Jun 1, 09:50 UTCJun 1, 10:25 UTC35m
2026-05-31 GBUFH - May 31, 13:00 UTCMay 31, 13:45 UTC45m
2026-05-31 GBUFH - May 31, 10:10 UTCMay 31, 11:05 UTC55m
2026-05-30 GBUFH - May 30, 14:35 UTCMay 30, 15:30 UTC55m
2026-05-30 GBUFH - May 30, 13:00 UTCMay 30, 13:15 UTC15m

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

Mode-S 4035EC frequently asked

What is Mode-S code 4035EC?
4035EC is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-BUFH.
Where is Mode-S 4035EC registered?
Mode-S code 4035EC 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 4035EC broadcasting right now?
No active broadcast right now. Last signal was 13h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4035EC, octal 20032754, decimal 4,208,108.
What flights does 4035EC operate?
Mode-S 4035EC has broadcast 1 distinct callsign, including GBUFH.