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sensors Mode-S transponder

407B44

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-GMAF · BEECH 200 Super King Air

Hex
407B44
Octal
20075504
Decimal
4,225,860
Country
GB
Tail
G-GMAF
Type
BE20
No current signal · last broadcast 2h ago
Flights observed
176
Distinct callsigns
4
Country
GB
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 407B44.

Country allocation

The ICAO 24-bit address 407B44 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 4 distinct

Callsign Airline Flights Last seen
GMA23 - 143 2026-07-15
GMA19 - 28 2026-06-25
GMA776 - 3 2026-07-16
GMA023 - 2 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 GMA023 - Jul 17, 23:50 UTCJul 18, 00:19 UTC30m
2026-07-17 GMA023 BOH → GCI Jul 17, 21:34 UTCJul 17, 22:05 UTC30m
2026-07-16 GMA776 NHT → BOH Jul 16, 16:30 UTCJul 16, 17:00 UTC30m
2026-07-16 GMA776 - Jul 16, 12:55 UTCJul 16, 15:14 UTC2h 20m
2026-07-16 GMA776 - Jul 16, 08:35 UTCJul 16, 10:40 UTC2h 5m
2026-07-15 GMA23 - Jul 15, 19:50 UTCJul 15, 20:20 UTC30m
2026-07-15 GMA23 SOU → GCI Jul 15, 18:05 UTCJul 15, 18:40 UTC35m
2026-07-15 GMA23 - Jul 15, 15:20 UTCJul 15, 15:50 UTC30m
2026-07-15 GMA23 BOH → GCI Jul 15, 13:10 UTCJul 15, 13:35 UTC25m
2026-07-10 GMA23 GCI → BOH Jul 10, 19:45 UTCJul 10, 20:20 UTC35m
2026-07-10 GMA23 - Jul 10, 16:50 UTCJul 10, 17:25 UTC35m
2026-07-10 GMA23 BOH → SOU Jul 10, 13:15 UTCJul 10, 13:30 UTC15m
2026-07-06 GMA23 - Jul 6, 19:05 UTCJul 6, 19:15 UTC10m
2026-07-06 GMA23 GCI → SOU Jul 6, 18:05 UTCJul 6, 18:40 UTC35m
2026-07-06 GMA23 - Jul 6, 16:00 UTCJul 6, 16:25 UTC25m
2026-07-06 GMA23 GCI → BOH Jul 6, 15:00 UTCJul 6, 15:30 UTC30m
2026-07-06 GMA23 BOH → GCI Jul 6, 12:40 UTCJul 6, 13:10 UTC30m
2026-07-05 GMA23 - Jul 5, 18:25 UTCJul 5, 18:55 UTC30m
2026-07-05 GMA23 SOU → GCI Jul 5, 16:35 UTCJul 5, 17:05 UTC30m
2026-07-05 GMA23 GCI → SOU Jul 5, 14:15 UTCJul 5, 14:50 UTC35m
2026-07-05 GMA23 BOH → GCI Jul 5, 11:40 UTCJul 5, 12:10 UTC30m
2026-07-04 GMA23 SOU → BOH Jul 4, 20:15 UTCJul 4, 20:25 UTC10m
2026-07-04 GMA23 GCI → SOU Jul 4, 18:10 UTCJul 4, 18:45 UTC35m
2026-07-04 GMA23 BOH → GCI Jul 4, 15:00 UTCJul 4, 15:30 UTC30m
2026-07-03 GMA23 GCI → BOH Jul 3, 16:50 UTCJul 3, 17:20 UTC30m
2026-07-03 GMA23 BOH → GCI Jul 3, 14:50 UTCJul 3, 15:20 UTC30m
2026-07-01 GMA23 GCI → BOH Jul 1, 14:10 UTCJul 1, 14:40 UTC30m
2026-07-01 GMA23 BOH → GCI Jul 1, 11:40 UTCJul 1, 12:10 UTC30m
2026-06-30 GMA23 GCI → BOH Jun 30, 18:05 UTCJun 30, 18:35 UTC30m
2026-06-30 GMA23 BOH → GCI Jun 30, 15:40 UTCJun 30, 16:10 UTC30m
2026-06-30 GMA23 GCI → BOH Jun 30, 12:45 UTCJun 30, 13:15 UTC30m
2026-06-30 GMA23 BOH → GCI Jun 30, 10:45 UTCJun 30, 11:20 UTC35m
2026-06-28 GMA23 GCI → BOH Jun 28, 18:10 UTCJun 28, 18:34 UTC25m
2026-06-28 GMA23 BOH → GCI Jun 28, 16:09 UTCJun 28, 16:35 UTC25m
2026-06-27 GMA23 GCI → BOH Jun 27, 19:39 UTCJun 27, 20:04 UTC25m
2026-06-27 GMA23 BOH → GCI Jun 27, 16:30 UTCJun 27, 17:04 UTC35m
2026-06-25 GMA19 - Jun 25, 11:44 UTCJun 25, 12:15 UTC30m
2026-06-25 GMA19 SOU → GCI Jun 25, 08:45 UTCJun 25, 09:20 UTC35m
2026-06-25 GMA19 JER → SOU Jun 25, 07:15 UTCJun 25, 07:49 UTC35m
2026-06-24 GMA19 BOH → JER Jun 24, 16:24 UTCJun 24, 16:54 UTC30m
2026-06-24 GMA23 - Jun 24, 11:24 UTCJun 24, 11:54 UTC30m
2026-06-24 GMA23 BOH → GCI Jun 24, 09:19 UTCJun 24, 09:45 UTC25m
2026-06-20 GMA23 - Jun 20, 19:19 UTCJun 20, 19:49 UTC30m
2026-06-20 GMA23 SOU → GCI Jun 20, 16:59 UTCJun 20, 17:29 UTC30m
2026-06-20 GMA23 - Jun 20, 14:39 UTCJun 20, 15:14 UTC35m
2026-06-20 GMA23 BOH → GCI Jun 20, 12:04 UTCJun 20, 12:34 UTC30m
2026-06-19 GMA23 - Jun 19, 19:54 UTCJun 19, 20:19 UTC25m
2026-06-19 GMA23 BOH → GCI Jun 19, 17:29 UTCJun 19, 18:05 UTC35m
2026-06-19 GMA23 GCI → BOH Jun 19, 12:54 UTCJun 19, 13:20 UTC25m
2026-06-19 GMA23 BOH → GCI Jun 19, 10:35 UTCJun 19, 11:09 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-GMAF page for operator, model, and routing details .

Mode-S 407B44 frequently asked

What is Mode-S code 407B44?
407B44 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-GMAF.
Where is Mode-S 407B44 registered?
Mode-S code 407B44 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 407B44 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 407B44, octal 20075504, decimal 4,225,860.
What flights does 407B44 operate?
Mode-S 407B44 has broadcast 4 distinct callsigns, including GMA23, GMA19, GMA776, GMA023.