Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

4026BB

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-BRUM · CESSNA 152

Hex
4026BB
Octal
20023273
Decimal
4,204,219
Country
GB
Tail
G-BRUM
Type
C152
No current signal · last broadcast 11h ago
Flights observed
167
Distinct callsigns
1
Country
GB
Last broadcast
11h ago

Last known position

Most recent position reported by Mode-S 4026BB.

Country allocation

The ICAO 24-bit address 4026BB 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
GBRUM - 167 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 GBRUM - Jul 17, 14:39 UTCJul 17, 15:29 UTC50m
2026-07-17 GBRUM - Jul 17, 13:05 UTCJul 17, 13:29 UTC25m
2026-07-17 GBRUM - Jul 17, 11:10 UTCJul 17, 12:04 UTC55m
2026-07-17 GBRUM - Jul 17, 08:45 UTCJul 17, 08:59 UTC15m
2026-07-16 GBRUM - Jul 16, 13:25 UTCJul 16, 13:54 UTC30m
2026-07-16 GBRUM - Jul 16, 09:20 UTCJul 16, 09:40 UTC20m
2026-07-15 GBRUM - Jul 15, 13:15 UTCJul 15, 14:05 UTC50m
2026-07-15 GBRUM - Jul 15, 11:35 UTCJul 15, 12:40 UTC1h 5m
2026-07-14 GBRUM - Jul 14, 13:50 UTCJul 14, 14:10 UTC20m
2026-07-12 GBRUM - Jul 12, 11:20 UTCJul 12, 12:01 UTC40m
2026-07-12 GBRUM - Jul 12, 09:40 UTCJul 12, 10:25 UTC45m
2026-07-11 GBRUM - Jul 11, 14:15 UTCJul 11, 15:10 UTC55m
2026-07-11 GBRUM - Jul 11, 12:15 UTCJul 11, 12:40 UTC25m
2026-07-10 GBRUM - Jul 10, 15:55 UTCJul 10, 16:30 UTC35m
2026-07-10 GBRUM - Jul 10, 11:30 UTCJul 10, 12:15 UTC45m
2026-07-09 GBRUM - Jul 9, 15:45 UTCJul 9, 16:30 UTC45m
2026-07-09 GBRUM - Jul 9, 14:30 UTCJul 9, 15:00 UTC30m
2026-07-09 GBRUM - Jul 9, 13:35 UTCJul 9, 14:25 UTC50m
2026-07-08 GBRUM - Jul 8, 14:10 UTCJul 8, 15:25 UTC1h 15m
2026-07-08 GBRUM - Jul 8, 12:05 UTCJul 8, 12:45 UTC40m
2026-07-08 GBRUM - Jul 8, 10:20 UTCJul 8, 11:00 UTC40m
2026-07-07 GBRUM - Jul 7, 15:25 UTCJul 7, 16:10 UTC45m
2026-07-07 GBRUM - Jul 7, 13:35 UTCJul 7, 14:25 UTC50m
2026-07-07 GBRUM - Jul 7, 09:25 UTCJul 7, 10:10 UTC45m
2026-07-06 GBRUM - Jul 6, 14:00 UTCJul 6, 14:40 UTC40m
2026-07-06 GBRUM - Jul 6, 12:25 UTCJul 6, 13:00 UTC35m
2026-07-06 GBRUM - Jul 6, 10:15 UTCJul 6, 10:40 UTC25m
2026-07-05 GBRUM - Jul 5, 16:15 UTCJul 5, 17:00 UTC45m
2026-07-05 GBRUM - Jul 5, 13:45 UTCJul 5, 14:25 UTC40m
2026-07-05 GBRUM - Jul 5, 12:20 UTCJul 5, 13:00 UTC40m
2026-07-05 GBRUM - Jul 5, 10:00 UTCJul 5, 10:45 UTC45m
2026-07-04 GBRUM - Jul 4, 13:20 UTCJul 4, 13:40 UTC20m
2026-07-04 GBRUM - Jul 4, 11:35 UTCJul 4, 12:30 UTC55m
2026-07-04 GBRUM - Jul 4, 09:25 UTCJul 4, 10:15 UTC50m
2026-07-03 GBRUM - Jul 3, 15:35 UTCJul 3, 16:20 UTC45m
2026-07-03 GBRUM - Jul 3, 13:10 UTCJul 3, 13:35 UTC25m
2026-07-03 GBRUM - Jul 3, 11:45 UTCJul 3, 12:05 UTC20m
2026-07-03 GBRUM - Jul 3, 10:35 UTCJul 3, 11:00 UTC25m
2026-07-02 GBRUM - Jul 2, 14:30 UTCJul 2, 15:15 UTC45m
2026-07-02 GBRUM - Jul 2, 12:50 UTCJul 2, 13:40 UTC50m
2026-07-02 GBRUM - Jul 2, 10:50 UTCJul 2, 11:25 UTC35m
2026-07-02 GBRUM - Jul 2, 09:35 UTCJul 2, 10:10 UTC35m
2026-07-01 GBRUM - Jul 1, 14:25 UTCJul 1, 15:25 UTC1h 0m
2026-07-01 GBRUM - Jul 1, 12:20 UTCJul 1, 13:45 UTC1h 25m
2026-07-01 GBRUM - Jul 1, 10:20 UTCJul 1, 11:05 UTC45m
2026-06-30 GBRUM - Jun 30, 16:55 UTCJun 30, 17:25 UTC30m
2026-06-30 GBRUM - Jun 30, 15:55 UTCJun 30, 16:10 UTC15m
2026-06-28 GBRUM - Jun 28, 15:44 UTCJun 28, 16:09 UTC25m
2026-06-28 GBRUM - Jun 28, 14:04 UTCJun 28, 14:30 UTC25m
2026-06-28 GBRUM - Jun 28, 13:04 UTCJun 28, 13:25 UTC20m

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

Mode-S 4026BB frequently asked

What is Mode-S code 4026BB?
4026BB is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-BRUM.
Where is Mode-S 4026BB registered?
Mode-S code 4026BB 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 4026BB 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 4026BB, octal 20023273, decimal 4,204,219.
What flights does 4026BB operate?
Mode-S 4026BB has broadcast 1 distinct callsign, including GBRUM.