Apparatus

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sensors Mode-S transponder

40803B

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-OBBI · GUIMBAL G-2 Cabri

Hex
40803B
Octal
20100073
Decimal
4,227,131
Country
GB
Tail
G-OBBI
Type
G2CA
No current signal · last broadcast 1h ago
Flights observed
75
Distinct callsigns
1
Country
GB
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 40803B.

Country allocation

The ICAO 24-bit address 40803B 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
GOBBI - 75 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 GOBBI - Jul 14, 10:35 UTCJul 14, 10:45 UTC10m
2026-07-14 GOBBI - Jul 14, 08:55 UTCJul 14, 09:30 UTC35m
2026-07-07 GOBBI BLK → BLK Jul 7, 14:30 UTCJul 7, 15:20 UTC50m
2026-07-07 GOBBI BLK → BLK Jul 7, 11:40 UTCJul 7, 12:50 UTC1h 10m
2026-07-07 GOBBI BLK → BLK Jul 7, 08:50 UTCJul 7, 09:20 UTC30m
2026-07-02 GOBBI - Jul 2, 14:55 UTCJul 2, 15:40 UTC45m
2026-07-02 GOBBI - Jul 2, 12:40 UTCJul 2, 13:20 UTC40m
2026-07-02 GOBBI BLK → BLK Jul 2, 10:15 UTCJul 2, 11:00 UTC45m
2026-06-30 GOBBI - Jun 30, 14:10 UTCJun 30, 15:00 UTC50m
2026-06-30 GOBBI BLK → BLK Jun 30, 10:35 UTCJun 30, 12:10 UTC1h 35m
2026-06-30 GOBBI - Jun 30, 09:05 UTCJun 30, 09:40 UTC35m
2026-06-25 GOBBI BLK → BLK Jun 25, 14:34 UTCJun 25, 15:24 UTC50m
2026-06-25 GOBBI BLK → BLK Jun 25, 11:15 UTCJun 25, 12:44 UTC1h 30m
2026-06-25 GOBBI BLK → BLK Jun 25, 09:10 UTCJun 25, 09:14 UTC5m
2026-06-25 GOBBI BLK → BLK Jun 25, 08:40 UTCJun 25, 08:55 UTC15m
2026-06-23 GOBBI BLK → BLK Jun 23, 14:29 UTCJun 23, 15:19 UTC50m
2026-06-23 GOBBI BLK → BLK Jun 23, 12:09 UTCJun 23, 13:05 UTC55m
2026-06-23 GOBBI BLK → BLK Jun 23, 10:39 UTCJun 23, 11:04 UTC25m
2026-06-23 GOBBI BLK → BLK Jun 23, 10:29 UTCJun 23, 10:35 UTC5m
2026-06-23 GOBBI BLK → BLK Jun 23, 08:30 UTCJun 23, 09:24 UTC55m
2026-06-18 GOBBI BLK → BLK Jun 18, 15:00 UTCJun 18, 15:25 UTC25m
2026-06-18 GOBBI BLK → BLK Jun 18, 12:25 UTCJun 18, 13:10 UTC45m
2026-06-18 GOBBI - Jun 18, 09:40 UTCJun 18, 11:05 UTC1h 25m
2026-06-16 GOBBI - Jun 16, 14:55 UTCJun 16, 15:09 UTC15m
2026-06-16 GOBBI - Jun 16, 14:09 UTCJun 16, 14:50 UTC40m
2026-06-16 GOBBI BLK → BLK Jun 16, 10:35 UTCJun 16, 11:20 UTC45m
2026-06-09 GOBBI BLK → BLK Jun 9, 14:40 UTCJun 9, 15:15 UTC35m
2026-06-09 GOBBI BLK → BLK Jun 9, 13:15 UTCJun 9, 13:45 UTC30m
2026-06-09 GOBBI - Jun 9, 11:35 UTCJun 9, 12:05 UTC30m
2026-06-09 GOBBI - Jun 9, 09:50 UTCJun 9, 10:55 UTC1h 5m
2026-06-08 GOBBI - Jun 8, 13:10 UTCJun 8, 14:35 UTC1h 25m
2026-06-08 GOBBI - Jun 8, 09:45 UTCJun 8, 11:10 UTC1h 25m
2026-06-05 GOBBI - Jun 5, 15:25 UTCJun 5, 16:00 UTC35m
2026-06-05 GOBBI - Jun 5, 13:15 UTCJun 5, 13:30 UTC15m
2026-06-05 GOBBI - Jun 5, 12:30 UTCJun 5, 12:45 UTC15m
2026-06-05 GOBBI - Jun 5, 10:40 UTCJun 5, 11:30 UTC50m
2026-06-02 GOBBI BLK → BLK Jun 2, 14:50 UTCJun 2, 15:10 UTC20m
2026-06-02 GOBBI BLK → BLK Jun 2, 13:15 UTCJun 2, 13:20 UTC5m
2026-05-07 GOBBI BLK → BLK May 7, 14:10 UTCMay 7, 15:00 UTC50m
2026-05-07 GOBBI BLK → BLK May 7, 10:00 UTCMay 7, 11:20 UTC1h 20m
2026-05-05 GOBBI BLK → BLK May 5, 14:50 UTCMay 5, 15:35 UTC45m
2026-05-05 GOBBI BLK → BLK May 5, 11:40 UTCMay 5, 12:40 UTC1h 0m
2026-05-05 GOBBI BLK → BLK May 5, 09:05 UTCMay 5, 09:20 UTC15m
2026-04-30 GOBBI BLK → BLK Apr 30, 14:40 UTCApr 30, 15:25 UTC45m
2026-04-30 GOBBI BLK → BLK Apr 30, 12:35 UTCApr 30, 13:05 UTC30m
2026-04-30 GOBBI BLK → BLK Apr 30, 10:50 UTCApr 30, 10:55 UTC5m
2026-04-30 GOBBI BLK → BLK Apr 30, 10:00 UTCApr 30, 10:45 UTC45m
2026-04-29 GOBBI BLK → BLK Apr 29, 13:35 UTCApr 29, 14:20 UTC45m
2026-04-28 GOBBI BLK → BLK Apr 28, 14:25 UTCApr 28, 15:25 UTC1h 0m
2026-04-28 GOBBI - Apr 28, 11:30 UTCApr 28, 12:05 UTC35m

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

Mode-S 40803B frequently asked

What is Mode-S code 40803B?
40803B is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-OBBI.
Where is Mode-S 40803B registered?
Mode-S code 40803B 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 40803B broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 40803B, octal 20100073, decimal 4,227,131.
What flights does 40803B operate?
Mode-S 40803B has broadcast 1 distinct callsign, including GOBBI.