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sensors Mode-S transponder

4031CE

ICAO 24-bit transponder address · allocated to United Kingdom

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

Hex
4031CE
Octal
20030716
Decimal
4,207,054
Country
GB
Tail
G-BSLT
Type
P28A
No current signal · last broadcast 19h ago
Flights observed
123
Distinct callsigns
1
Country
GB
Last broadcast
19h ago

Last known position

Most recent position reported by Mode-S 4031CE.

Country allocation

The ICAO 24-bit address 4031CE 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
GBSLT - 123 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 GBSLT - Jul 13, 13:35 UTCJul 13, 14:05 UTC30m
2026-07-13 GBSLT - Jul 13, 10:00 UTCJul 13, 11:00 UTC1h 0m
2026-07-12 GBSLT PSL → PSL Jul 12, 14:50 UTCJul 12, 15:40 UTC50m
2026-07-12 GBSLT - Jul 12, 12:20 UTCJul 12, 12:50 UTC30m
2026-07-12 GBSLT PSL → PSL Jul 12, 10:15 UTCJul 12, 10:55 UTC40m
2026-07-10 GBSLT - Jul 10, 12:45 UTCJul 10, 13:30 UTC45m
2026-07-10 GBSLT - Jul 10, 10:25 UTCJul 10, 11:20 UTC55m
2026-07-09 GBSLT - Jul 9, 13:55 UTCJul 9, 15:10 UTC1h 15m
2026-07-09 GBSLT - Jul 9, 11:05 UTCJul 9, 13:00 UTC1h 55m
2026-07-08 GBSLT - Jul 8, 14:50 UTCJul 8, 15:45 UTC55m
2026-07-08 GBSLT - Jul 8, 13:05 UTCJul 8, 13:55 UTC50m
2026-07-07 GBSLT PSL → PSL Jul 7, 12:20 UTCJul 7, 12:35 UTC15m
2026-07-07 GBSLT - Jul 7, 10:20 UTCJul 7, 11:20 UTC1h 0m
2026-07-06 GBSLT - Jul 6, 13:35 UTCJul 6, 14:20 UTC45m
2026-07-06 GBSLT PSL → PSL Jul 6, 10:55 UTCJul 6, 11:45 UTC50m
2026-07-05 GBSLT - Jul 5, 11:15 UTCJul 5, 12:10 UTC55m
2026-07-05 GBSLT PSL → PSL Jul 5, 08:45 UTCJul 5, 09:25 UTC40m
2026-06-18 GBSLT PSL → PSL Jun 18, 13:15 UTCJun 18, 14:01 UTC45m
2026-06-18 GBSLT PSL → PSL Jun 18, 09:55 UTCJun 18, 10:30 UTC35m
2026-06-17 GBSLT - Jun 17, 12:25 UTCJun 17, 13:45 UTC1h 20m
2026-06-13 GBSLT - Jun 13, 12:55 UTCJun 13, 13:50 UTC55m
2026-06-12 GBSLT PSL → PSL Jun 12, 14:40 UTCJun 12, 15:35 UTC55m
2026-06-12 GBSLT PSL → PSL Jun 12, 13:05 UTCJun 12, 13:50 UTC45m
2026-06-12 GBSLT - Jun 12, 09:55 UTCJun 12, 10:50 UTC55m
2026-06-09 GBSLT PSL → PSL Jun 9, 12:55 UTCJun 9, 13:55 UTC1h 0m
2026-06-09 GBSLT PSL → PSL Jun 9, 11:45 UTCJun 9, 12:20 UTC35m
2026-06-09 GBSLT - Jun 9, 10:30 UTCJun 9, 11:15 UTC45m
2026-06-08 GBSLT PSL → PSL Jun 8, 14:40 UTCJun 8, 15:20 UTC40m
2026-06-08 GBSLT PSL → PSL Jun 8, 10:20 UTCJun 8, 11:05 UTC45m
2026-06-07 GBSLT PSL → PSL Jun 7, 12:55 UTCJun 7, 14:05 UTC1h 10m
2026-06-06 GBSLT PSL → PSL Jun 6, 09:55 UTCJun 6, 10:34 UTC40m
2026-06-06 GBSLT PSL → PSL Jun 6, 08:25 UTCJun 6, 08:50 UTC25m
2026-06-05 GBSLT - Jun 5, 14:50 UTCJun 5, 15:30 UTC40m
2026-06-05 GBSLT PSL → PSL Jun 5, 10:20 UTCJun 5, 11:00 UTC40m
2026-06-04 GBSLT PSL → PSL Jun 4, 14:40 UTCJun 4, 14:55 UTC15m
2026-06-04 GBSLT - Jun 4, 12:00 UTCJun 4, 12:20 UTC20m
2026-06-04 GBSLT PSL → PSL Jun 4, 09:50 UTCJun 4, 10:45 UTC55m
2026-06-02 GBSLT - Jun 2, 08:15 UTCJun 2, 09:10 UTC55m
2026-05-31 GBSLT PSL → PSL May 31, 12:50 UTCMay 31, 14:55 UTC2h 5m
2026-05-31 GBSLT - May 31, 11:45 UTCMay 31, 12:10 UTC25m
2026-05-31 GBSLT PSL → PSL May 31, 09:10 UTCMay 31, 10:35 UTC1h 25m
2026-05-30 GBSLT PSL → PSL May 30, 15:00 UTCMay 30, 15:50 UTC50m
2026-05-30 GBSLT - May 30, 13:20 UTCMay 30, 14:10 UTC50m
2026-05-29 GBSLT PSL → PSL May 29, 08:35 UTCMay 29, 09:35 UTC1h 0m
2026-05-28 GBSLT PSL → PSL May 28, 15:05 UTCMay 28, 16:00 UTC55m
2026-05-27 GBSLT - May 27, 13:50 UTCMay 27, 15:40 UTC1h 50m
2026-05-27 GBSLT PSL → PSL May 27, 09:30 UTCMay 27, 10:30 UTC1h 0m
2026-05-26 GBSLT - May 26, 14:45 UTCMay 26, 15:29 UTC45m
2026-05-26 GBSLT PSL → PSL May 26, 08:39 UTCMay 26, 10:44 UTC2h 5m
2026-05-25 GBSLT - May 25, 13:45 UTCMay 25, 14:40 UTC55m

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

Mode-S 4031CE frequently asked

What is Mode-S code 4031CE?
4031CE is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-BSLT.
Where is Mode-S 4031CE registered?
Mode-S code 4031CE 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 4031CE broadcasting right now?
No active broadcast right now. Last signal was 19h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4031CE, octal 20030716, decimal 4,207,054.
What flights does 4031CE operate?
Mode-S 4031CE has broadcast 1 distinct callsign, including GBSLT.