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sensors Mode-S transponder

407B1E

ICAO 24-bit transponder address · allocated to United Kingdom

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

Hex
407B1E
Octal
20075436
Decimal
4,225,822
Country
GB
Tail
G-CLWB
Type
P28A
Broadcasting now · callsign GCLWB · 3,950 ft
Flights observed
272
Distinct callsigns
1
Country
GB
Last broadcast
17m ago

Current position

407B1E is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 407B1E 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
GCLWB - 272 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 GCLWB - Jul 14, 11:20 UTCJul 14, 11:30 UTC10m
2026-07-12 GCLWB NWI → NWI Jul 12, 18:05 UTCJul 12, 18:50 UTC45m
2026-07-12 GCLWB NWI → NWI Jul 12, 14:25 UTCJul 12, 15:20 UTC55m
2026-07-12 GCLWB - Jul 12, 12:15 UTCJul 12, 13:15 UTC1h 0m
2026-07-12 GCLWB NWI → NWI Jul 12, 10:20 UTCJul 12, 11:10 UTC50m
2026-07-12 GCLWB NWI → NWI Jul 12, 07:40 UTCJul 12, 08:25 UTC45m
2026-07-11 GCLWB - Jul 11, 17:20 UTCJul 11, 20:35 UTC3h 15m
2026-07-11 GCLWB - Jul 11, 15:20 UTCJul 11, 16:45 UTC1h 25m
2026-07-11 GCLWB - Jul 11, 13:05 UTCJul 11, 14:25 UTC1h 20m
2026-07-10 GCLWB - Jul 10, 15:25 UTCJul 10, 16:20 UTC55m
2026-07-10 GCLWB - Jul 10, 13:50 UTCJul 10, 14:25 UTC35m
2026-07-10 GCLWB - Jul 10, 12:40 UTCJul 10, 13:15 UTC35m
2026-07-10 GCLWB NWI → NWI Jul 10, 09:55 UTCJul 10, 10:30 UTC35m
2026-07-10 GCLWB - Jul 10, 08:05 UTCJul 10, 08:50 UTC45m
2026-07-09 GCLWB - Jul 9, 16:45 UTCJul 9, 17:40 UTC55m
2026-07-09 GCLWB - Jul 9, 14:45 UTCJul 9, 15:35 UTC50m
2026-07-09 GCLWB - Jul 9, 11:55 UTCJul 9, 12:40 UTC45m
2026-07-09 GCLWB - Jul 9, 10:00 UTCJul 9, 11:10 UTC1h 10m
2026-07-08 GCLWB - Jul 8, 14:30 UTCJul 8, 15:10 UTC40m
2026-07-08 GCLWB - Jul 8, 12:20 UTCJul 8, 13:00 UTC40m
2026-07-08 GCLWB NWI → NWI Jul 8, 10:10 UTCJul 8, 10:50 UTC40m
2026-07-08 GCLWB NWI → NWI Jul 8, 08:05 UTCJul 8, 09:10 UTC1h 5m
2026-07-07 GCLWB - Jul 7, 19:20 UTCJul 7, 19:50 UTC30m
2026-07-07 GCLWB - Jul 7, 18:45 UTCJul 7, 19:00 UTC15m
2026-07-07 GCLWB NWI → NWI Jul 7, 17:05 UTCJul 7, 17:40 UTC35m
2026-07-07 GCLWB - Jul 7, 15:05 UTCJul 7, 16:00 UTC55m
2026-07-07 GCLWB - Jul 7, 12:55 UTCJul 7, 13:35 UTC40m
2026-07-07 GCLWB - Jul 7, 10:25 UTCJul 7, 11:00 UTC35m
2026-07-07 GCLWB - Jul 7, 08:20 UTCJul 7, 09:10 UTC50m
2026-07-06 GCLWB - Jul 6, 16:10 UTCJul 6, 16:45 UTC35m
2026-07-06 GCLWB - Jul 6, 14:10 UTCJul 6, 14:55 UTC45m
2026-07-06 GCLWB - Jul 6, 12:05 UTCJul 6, 13:20 UTC1h 15m
2026-07-06 GCLWB - Jul 6, 08:55 UTCJul 6, 10:55 UTC2h 0m
2026-07-05 GCLWB - Jul 5, 17:20 UTCJul 5, 18:10 UTC50m
2026-07-05 GCLWB - Jul 5, 15:05 UTCJul 5, 15:40 UTC35m
2026-07-05 GCLWB NWI → NWI Jul 5, 12:55 UTCJul 5, 13:45 UTC50m
2026-07-05 GCLWB - Jul 5, 10:15 UTCJul 5, 12:25 UTC2h 10m
2026-07-05 GCLWB - Jul 5, 07:25 UTCJul 5, 08:20 UTC55m
2026-07-04 GCLWB NWI → NWI Jul 4, 18:15 UTCJul 4, 18:35 UTC20m
2026-07-04 GCLWB NWI → NWI Jul 4, 17:05 UTCJul 4, 18:00 UTC55m
2026-07-04 GCLWB NWI → NWI Jul 4, 12:20 UTCJul 4, 13:25 UTC1h 5m
2026-07-04 GCLWB - Jul 4, 10:25 UTCJul 4, 11:15 UTC50m
2026-07-04 GCLWB - Jul 4, 08:20 UTCJul 4, 09:15 UTC55m
2026-07-03 GCLWB - Jul 3, 16:30 UTCJul 3, 18:20 UTC1h 50m
2026-07-03 GCLWB - Jul 3, 13:35 UTCJul 3, 14:35 UTC1h 0m
2026-07-03 GCLWB - Jul 3, 10:40 UTCJul 3, 10:50 UTC10m
2026-07-03 GCLWB - Jul 3, 08:05 UTCJul 3, 09:15 UTC1h 10m
2026-07-02 GCLWB - Jul 2, 14:45 UTCJul 2, 15:35 UTC50m
2026-07-02 GCLWB - Jul 2, 10:50 UTCJul 2, 11:55 UTC1h 5m
2026-07-01 GCLWB - Jul 1, 16:30 UTCJul 1, 17:25 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-CLWB page for operator, model, and routing details .

Mode-S 407B1E frequently asked

What is Mode-S code 407B1E?
407B1E is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-CLWB.
Where is Mode-S 407B1E registered?
Mode-S code 407B1E 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 407B1E broadcasting right now?
Yes. Mode-S 407B1E is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 407B1E, octal 20075436, decimal 4,225,822.
What flights does 407B1E operate?
Mode-S 407B1E has broadcast 1 distinct callsign, including GCLWB.