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sensors Mode-S transponder

406B5A

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-GATK · AIRBUS A-320

Hex
406B5A
Octal
20065532
Decimal
4,221,786
Country
GB
Tail
G-GATK
Type
A320
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
335
Distinct callsigns
20
Country
GB
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S 406B5A.

Country allocation

The ICAO 24-bit address 406B5A 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 20 distinct

Callsign Airline Flights Last seen
EFW24AD BA Euroflyer 20 2026-07-22
EFW6DG BA Euroflyer 18 2026-07-22
EFW39FL - 13 2026-06-25
EFW7SN - 12 2026-06-25
EFW69BK - 10 2026-07-19
EFW67A - 10 2026-07-19
EFW983X BA Euroflyer 8 2026-05-16
EFW5BR - 8 2026-07-17
EFW56R - 8 2026-07-17
EFW741W - 7 2026-07-26
EFW50Z BA Euroflyer 7 2026-07-26
EFW9PF BA Euroflyer 6 2026-05-16
EFW65ZZ - 6 2026-07-01
EFW5SL - 6 2026-06-29
EFW595N - 6 2026-07-09
EFW58W - 6 2026-07-04
EFW53CV BA Euroflyer 6 2026-07-25
EFW461M - 6 2026-06-29
EFW33LD - 6 2026-07-04
EFW29CF BA Euroflyer 6 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EFW682Q DBV → LGW Jul 26, 20:55 UTCJul 26, 22:30 UTC1h 35m
2026-07-26 EFW878W LGW → DBV Jul 26, 17:20 UTCJul 26, 19:40 UTC2h 20m
2026-07-26 EFW50Z HER → LGW Jul 26, 12:00 UTCJul 26, 15:55 UTC3h 55m
2026-07-26 EFW741W - Jul 26, 06:55 UTCJul 26, 10:00 UTC3h 5m
2026-07-25 EFW96LG CAG → LGW Jul 25, 21:00 UTCJul 25, 23:10 UTC2h 10m
2026-07-25 EFW93PM LGW → CAG Jul 25, 17:20 UTCJul 25, 19:35 UTC2h 15m
2026-07-25 EFW53CV TFS → LGW Jul 25, 11:50 UTCJul 25, 15:40 UTC3h 50m
2026-07-25 EFW29CF LGW → TFS Jul 25, 06:25 UTCJul 25, 10:00 UTC3h 35m
2026-07-24 EFW8CQ TFS → LGW Jul 24, 18:55 UTCJul 24, 22:15 UTC3h 20m
2026-07-24 EFW26BF LGW → TFS Jul 24, 13:45 UTCJul 24, 17:30 UTC3h 45m
2026-07-24 EFW23SM PMI → LGW Jul 24, 09:15 UTCJul 24, 11:10 UTC1h 55m
2026-07-24 EFW74JG LGW → PMI Jul 24, 05:55 UTCJul 24, 07:40 UTC1h 45m
2026-07-23 EFW8RA VRN → LGW Jul 23, 19:50 UTCJul 23, 21:25 UTC1h 35m
2026-07-23 EFW657G LGW → VRN Jul 23, 17:15 UTCJul 23, 18:45 UTC1h 30m
2026-07-23 EFW53CV TFS → LGW Jul 23, 12:05 UTCJul 23, 15:35 UTC3h 30m
2026-07-23 EFW29CF LGW → TFS Jul 23, 06:25 UTCJul 23, 10:20 UTC3h 55m
2026-07-22 EFW6DG LCA → LGW Jul 22, 14:45 UTCJul 22, 19:30 UTC4h 45m
2026-07-22 EFW24AD LGW → LCA Jul 22, 10:20 UTCJul 22, 13:00 UTC2h 40m
2026-07-21 EFW584Y BRI → LGW Jul 21, 21:05 UTCJul 21, 23:55 UTC2h 50m
2026-07-21 EFW44VD LGW → BRI Jul 21, 16:50 UTCJul 21, 19:10 UTC2h 20m
2026-07-21 EFW93E LGW → ACE Jul 21, 07:00 UTCJul 21, 15:25 UTC8h 25m
2026-07-20 EFW42YR IBZ → LGW Jul 20, 18:35 UTCJul 20, 20:30 UTC1h 55m
2026-07-20 EFW15AV LGW → IBZ Jul 20, 15:30 UTCJul 20, 17:30 UTC2h 0m
2026-07-20 EFW64C - Jul 20, 11:45 UTCJul 20, 14:05 UTC2h 20m
2026-07-20 EFW2BZ LGW → AGP Jul 20, 06:00 UTCJul 20, 08:20 UTC2h 20m
2026-07-19 EFW69BK - Jul 19, 13:15 UTCJul 19, 17:35 UTC4h 20m
2026-07-19 EFW67A LGW → AYT Jul 19, 07:55 UTCJul 19, 11:40 UTC3h 45m
2026-07-18 EFW169K NCE → LGW Jul 18, 20:15 UTCJul 18, 21:50 UTC1h 35m
2026-07-18 EFW89WH LGW → NCE Jul 18, 17:15 UTCJul 18, 18:40 UTC1h 25m
2026-07-18 EFW53CV - Jul 18, 11:45 UTCJul 18, 15:20 UTC3h 35m
2026-07-18 EFW29CF LGW → TFS Jul 18, 06:30 UTCJul 18, 10:15 UTC3h 45m
2026-07-17 EFW5BR JER → LGW Jul 17, 19:45 UTCJul 17, 20:15 UTC30m
2026-07-17 EFW56R LGW → JER Jul 17, 18:15 UTCJul 17, 18:44 UTC30m
2026-07-17 EFW6DG LCA → LGW Jul 17, 12:10 UTCJul 17, 16:44 UTC4h 35m
2026-07-17 EFW24AD LGW → LCA Jul 17, 06:54 UTCJul 17, 10:50 UTC3h 55m
2026-07-16 EFW69BK AYT → LGW Jul 16, 19:30 UTCJul 16, 23:55 UTC4h 25m
2026-07-16 EFW67A LGW → AYT Jul 16, 13:34 UTCJul 16, 17:10 UTC3h 35m
2026-07-16 EFW14MA - Jul 16, 10:20 UTCJul 16, 12:00 UTC1h 40m
2026-07-16 EFW43ZW - Jul 16, 07:35 UTCJul 16, 09:05 UTC1h 30m
2026-07-15 EFW5BR JER → LGW Jul 15, 20:00 UTCJul 15, 20:30 UTC30m
2026-07-15 EFW56R LGW → JER Jul 15, 18:20 UTCJul 15, 19:00 UTC40m
2026-07-15 EFW59AU - Jul 15, 11:45 UTCJul 15, 15:30 UTC3h 45m
2026-07-15 EFW85ZE - Jul 15, 06:55 UTCJul 15, 10:05 UTC3h 10m
2026-07-14 EFW91P - Jul 14, 14:00 UTCJul 14, 18:05 UTC4h 5m
2026-07-14 EFW76D - Jul 14, 09:10 UTCJul 14, 12:20 UTC3h 10m
2026-07-13 EFW69BK - Jul 13, 19:20 UTCJul 13, 23:35 UTC4h 15m
2026-07-13 EFW67A LGW → AYT Jul 13, 13:40 UTCJul 13, 17:10 UTC3h 30m
2026-07-13 EFW14MA - Jul 13, 10:00 UTCJul 13, 11:55 UTC1h 55m
2026-07-13 EFW43ZW - Jul 13, 07:25 UTCJul 13, 08:55 UTC1h 30m
2026-07-12 EFW811N OPO → LGW Jul 12, 21:05 UTCJul 12, 22:55 UTC1h 50m

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

Mode-S 406B5A frequently asked

What is Mode-S code 406B5A?
406B5A is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-GATK.
Where is Mode-S 406B5A registered?
Mode-S code 406B5A 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 406B5A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 406B5A, octal 20065532, decimal 4,221,786.
What flights does 406B5A operate?
Mode-S 406B5A has broadcast 20 distinct callsigns, including EFW24AD, EFW6DG, EFW39FL, EFW7SN, EFW69BK.