Apparatus

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sensors Mode-S transponder

4011B4

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-FCUM · ROBINSON R-44 Raven

Hex
4011B4
Octal
20010664
Decimal
4,198,836
Country
GB
Tail
G-FCUM
Type
R44
No current signal · last broadcast 11h ago
Flights observed
121
Distinct callsigns
1
Country
GB
Last broadcast
11h ago

Last known position

Most recent position reported by Mode-S 4011B4.

Country allocation

The ICAO 24-bit address 4011B4 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
GOLAJ - 121 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 GOLAJ - Jul 17, 14:00 UTCJul 17, 15:00 UTC1h 0m
2026-07-17 GOLAJ - Jul 17, 11:20 UTCJul 17, 11:55 UTC35m
2026-07-15 GOLAJ - Jul 15, 13:45 UTCJul 15, 15:25 UTC1h 40m
2026-07-15 GOLAJ BOH → BOH Jul 15, 10:45 UTCJul 15, 12:25 UTC1h 40m
2026-07-14 GOLAJ - Jul 14, 14:35 UTCJul 14, 14:45 UTC10m
2026-07-14 GOLAJ - Jul 14, 14:20 UTCJul 14, 14:30 UTC10m
2026-07-13 GOLAJ - Jul 13, 11:00 UTCJul 13, 12:15 UTC1h 15m
2026-07-12 GOLAJ BOH → BOH Jul 12, 14:35 UTCJul 12, 14:55 UTC20m
2026-07-12 GOLAJ BOH → BOH Jul 12, 12:10 UTCJul 12, 13:25 UTC1h 15m
2026-07-12 GOLAJ - Jul 12, 08:55 UTCJul 12, 10:30 UTC1h 35m
2026-07-11 GOLAJ - Jul 11, 15:40 UTCJul 11, 16:00 UTC20m
2026-07-11 GOLAJ - Jul 11, 13:10 UTCJul 11, 13:45 UTC35m
2026-07-11 GOLAJ BOH → BOH Jul 11, 10:10 UTCJul 11, 11:50 UTC1h 40m
2026-07-10 GOLAJ BOH → BOH Jul 10, 12:50 UTCJul 10, 13:30 UTC40m
2026-07-10 GOLAJ BOH → BOH Jul 10, 10:50 UTCJul 10, 11:35 UTC45m
2026-07-09 GOLAJ BOH → BOH Jul 9, 12:40 UTCJul 9, 13:30 UTC50m
2026-07-08 GOLAJ - Jul 8, 15:55 UTCJul 8, 16:45 UTC50m
2026-07-08 GOLAJ - Jul 8, 14:55 UTCJul 8, 15:10 UTC15m
2026-07-08 GOLAJ - Jul 8, 13:35 UTCJul 8, 14:20 UTC45m
2026-07-08 GOLAJ - Jul 8, 11:00 UTCJul 8, 12:30 UTC1h 30m
2026-07-04 GOLAJ - Jul 4, 15:00 UTCJul 4, 15:15 UTC15m
2026-07-04 GOLAJ - Jul 4, 13:00 UTCJul 4, 13:50 UTC50m
2026-07-04 GOLAJ - Jul 4, 11:05 UTCJul 4, 11:25 UTC20m
2026-07-04 GOLAJ - Jul 4, 10:45 UTCJul 4, 11:00 UTC15m
2026-06-29 GOLAJ HYC → BOH Jun 29, 16:00 UTCJun 29, 16:44 UTC45m
2026-06-29 GOLAJ BOH → HYC Jun 29, 08:54 UTCJun 29, 09:44 UTC50m
2026-06-27 GOLAJ - Jun 27, 13:00 UTCJun 27, 14:14 UTC1h 15m
2026-06-27 GOLAJ - Jun 27, 10:14 UTCJun 27, 11:59 UTC1h 45m
2026-06-26 GOLAJ - Jun 26, 10:20 UTCJun 26, 11:55 UTC1h 35m
2026-06-25 GOLAJ BOH → BOH Jun 25, 13:29 UTCJun 25, 14:20 UTC50m
2026-06-25 GOLAJ BOH → BOH Jun 25, 09:45 UTCJun 25, 09:59 UTC15m
2026-06-24 GOLAJ - Jun 24, 14:34 UTCJun 24, 15:09 UTC35m
2026-06-24 GOLAJ - Jun 24, 12:44 UTCJun 24, 13:00 UTC15m
2026-06-24 GOLAJ - Jun 24, 10:39 UTCJun 24, 12:09 UTC1h 30m
2026-06-23 GOLAJ - Jun 23, 14:25 UTCJun 23, 14:44 UTC20m
2026-06-22 GOLAJ BOH → BOH Jun 22, 14:45 UTCJun 22, 15:50 UTC1h 5m
2026-06-22 GOLAJ - Jun 22, 12:34 UTCJun 22, 14:10 UTC1h 35m
2026-06-22 GOLAJ - Jun 22, 09:34 UTCJun 22, 11:30 UTC1h 55m
2026-06-21 GOLAJ - Jun 21, 13:15 UTCJun 21, 13:29 UTC15m
2026-06-21 GOLAJ - Jun 21, 10:54 UTCJun 21, 11:15 UTC20m
2026-06-20 GOLAJ - Jun 20, 14:39 UTCJun 20, 15:44 UTC1h 5m
2026-06-20 GOLAJ - Jun 20, 13:14 UTCJun 20, 13:49 UTC35m
2026-06-19 GOLAJ - Jun 19, 12:54 UTCJun 19, 13:14 UTC20m
2026-06-19 GOLAJ BOH → BOH Jun 19, 10:29 UTCJun 19, 11:45 UTC1h 15m
2026-06-17 GOLAJ BOH → BOH Jun 17, 14:15 UTCJun 17, 14:25 UTC10m
2026-06-15 GOLAJ BOH → BOH Jun 15, 10:24 UTCJun 15, 11:10 UTC45m
2026-06-14 GOLAJ - Jun 14, 15:40 UTCJun 14, 16:10 UTC30m
2026-06-14 GOLAJ - Jun 14, 13:45 UTCJun 14, 14:30 UTC45m
2026-06-14 GOLAJ - Jun 14, 11:00 UTCJun 14, 12:25 UTC1h 25m
2026-06-14 GOLAJ - Jun 14, 09:00 UTCJun 14, 10:25 UTC1h 25m

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

Mode-S 4011B4 frequently asked

What is Mode-S code 4011B4?
4011B4 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-FCUM.
Where is Mode-S 4011B4 registered?
Mode-S code 4011B4 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 4011B4 broadcasting right now?
No active broadcast right now. Last signal was 11h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4011B4, octal 20010664, decimal 4,198,836.
What flights does 4011B4 operate?
Mode-S 4011B4 has broadcast 1 distinct callsign, including GOLAJ.