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sensors Mode-S transponder

400AFF

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-EUXG · AIRBUS A-321

Hex
400AFF
Octal
20005377
Decimal
4,197,119
Country
GB
Tail
G-EUXG
Type
A321
No current signal · last broadcast 11d ago
Flights observed
295
Distinct callsigns
20
Country
GB
Last broadcast
11d ago

Last known position

Most recent position reported by Mode-S 400AFF.

Country allocation

The ICAO 24-bit address 400AFF 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
EFW9RZ - 7 2026-07-04
EFW81W - 7 2026-07-15
EFW75H BA Euroflyer 7 2026-07-24
EFW74V - 7 2026-07-15
EFW3TW BA Euroflyer 7 2026-07-24
EFW3MG - 7 2026-06-30
EFW22D - 7 2026-06-30
EFW12LS - 7 2026-07-04
EFW527R - 6 2026-06-14
EFW29WB - 6 2026-07-13
EFW26CX - 6 2026-07-13
EFW93CA - 5 2026-07-09
EFW8RA BA Euroflyer 5 2026-07-07
EFW811N - 5 2026-07-14
EFW74JG BA Euroflyer 5 2026-07-17
EFW65TM - 5 2026-07-09
EFW657G - 5 2026-07-07
EFW62T BA Euroflyer 5 2026-07-23
EFW5QQ - 5 2026-07-24
EFW568X - 5 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EFW83SY - Jul 26, 19:25 UTCJul 26, 21:45 UTC2h 20m
2026-07-26 EFW147P - Jul 26, 14:20 UTCJul 26, 17:25 UTC3h 5m
2026-07-26 EFW337J NCE → LGW Jul 26, 11:00 UTCJul 26, 12:35 UTC1h 35m
2026-07-26 EFW16HC LGW → NCE Jul 26, 07:40 UTCJul 26, 09:40 UTC2h 0m
2026-07-25 EFW93ML ACE → LGW Jul 25, 19:40 UTCJul 25, 23:05 UTC3h 25m
2026-07-25 EFW595N - Jul 25, 14:45 UTCJul 25, 17:50 UTC3h 5m
2026-07-25 EFW16YK CAG → LGW Jul 25, 10:30 UTCJul 25, 12:45 UTC2h 15m
2026-07-25 EFW35LD LGW → CAG Jul 25, 06:45 UTCJul 25, 08:50 UTC2h 5m
2026-07-24 EFW75H FAO → LGW Jul 24, 19:25 UTCJul 24, 21:40 UTC2h 15m
2026-07-24 EFW3TW LGW → FAO Jul 24, 15:30 UTCJul 24, 17:55 UTC2h 25m
2026-07-24 EFW34VK - Jul 24, 11:10 UTCJul 24, 13:40 UTC2h 30m
2026-07-24 EFW5QQ - Jul 24, 07:40 UTCJul 24, 09:50 UTC2h 10m
2026-07-23 EFW62T TRN → LGW Jul 23, 19:20 UTCJul 23, 20:50 UTC1h 30m
2026-07-23 EFW4SS LGW → TRN Jul 23, 16:40 UTCJul 23, 18:05 UTC1h 25m
2026-07-23 EFW337J NCE → LGW Jul 23, 13:05 UTCJul 23, 14:50 UTC1h 45m
2026-07-23 EFW16HC LGW → NCE Jul 23, 09:45 UTCJul 23, 11:15 UTC1h 30m
2026-07-22 EFW62T TRN → LGW Jul 22, 20:15 UTCJul 22, 21:50 UTC1h 35m
2026-07-22 EFW4SS LGW → TRN Jul 22, 17:45 UTCJul 22, 19:05 UTC1h 20m
2026-07-22 EFW53CV TFS → LGW Jul 22, 12:25 UTCJul 22, 15:55 UTC3h 30m
2026-07-21 EFW75H FAO → LGW Jul 21, 17:50 UTCJul 21, 20:05 UTC2h 15m
2026-07-21 EFW3TW LGW → FAO Jul 21, 14:25 UTCJul 21, 16:50 UTC2h 25m
2026-07-21 EFW86R SKG → LGW Jul 21, 09:30 UTCJul 21, 12:45 UTC3h 15m
2026-07-21 EFW82X LGW → SKG Jul 21, 05:20 UTCJul 21, 08:05 UTC2h 45m
2026-07-20 EFW169K NCE → LGW Jul 20, 19:35 UTCJul 20, 21:05 UTC1h 30m
2026-07-20 EFW89WH LGW → NCE Jul 20, 16:05 UTCJul 20, 17:35 UTC1h 30m
2026-07-20 EFW86R SKG → LGW Jul 20, 11:15 UTCJul 20, 14:20 UTC3h 5m
2026-07-20 EFW82X LGW → SKG Jul 20, 07:20 UTCJul 20, 10:00 UTC2h 40m
2026-07-19 EFW2FC - Jul 19, 20:35 UTCJul 19, 23:20 UTC2h 45m
2026-07-19 EFW4LY - Jul 19, 15:40 UTCJul 19, 18:30 UTC2h 50m
2026-07-19 EFW91BM - Jul 19, 11:10 UTCJul 19, 14:00 UTC2h 50m
2026-07-19 EFW9UQ - Jul 19, 06:40 UTCJul 19, 08:55 UTC2h 15m
2026-07-18 EFW265E IBZ → LGW Jul 18, 23:00 UTCJul 19, 00:55 UTC1h 55m
2026-07-18 EFW370K LGW → IBZ Jul 18, 18:50 UTCJul 18, 20:50 UTC2h 0m
2026-07-18 EFW6RQ HER → LGW Jul 18, 13:40 UTCJul 18, 17:15 UTC3h 35m
2026-07-18 EFW5QL - Jul 18, 08:25 UTCJul 18, 11:35 UTC3h 10m
2026-07-17 EFW83SY RHO → LGW Jul 17, 18:44 UTCJul 17, 22:55 UTC4h 10m
2026-07-17 EFW147P LGW → RHO Jul 17, 14:00 UTCJul 17, 17:30 UTC3h 30m
2026-07-17 EFW23SM - Jul 17, 09:40 UTCJul 17, 11:35 UTC1h 55m
2026-07-17 EFW74JG LGW → PMI Jul 17, 06:00 UTCJul 17, 08:00 UTC2h 0m
2026-07-16 EFW62T TRN → LGW Jul 16, 20:39 UTCJul 16, 22:30 UTC1h 50m
2026-07-16 EFW4SS LGW → TRN Jul 16, 17:45 UTCJul 16, 19:10 UTC1h 25m
2026-07-16 EFW50Z - Jul 16, 12:40 UTCJul 16, 16:15 UTC3h 35m
2026-07-16 EFW741W - Jul 16, 07:55 UTCJul 16, 10:59 UTC3h 5m
2026-07-15 EFW74V - Jul 15, 20:00 UTCJul 15, 23:55 UTC3h 55m
2026-07-15 EFW81W LGW → KGS Jul 15, 14:15 UTCJul 15, 17:35 UTC3h 20m
2026-07-15 EFW58W BOD → LGW Jul 15, 10:40 UTCJul 15, 11:55 UTC1h 15m
2026-07-15 EFW33LD LGW → BOD Jul 15, 08:10 UTCJul 15, 09:25 UTC1h 15m
2026-07-14 EFW811N OPO → LGW Jul 14, 20:35 UTCJul 14, 22:30 UTC1h 55m
2026-07-14 EFW568X LGW → OPO Jul 14, 17:20 UTCJul 14, 19:20 UTC2h 0m
2026-07-14 EFW74V - Jul 14, 11:55 UTCJul 14, 15:50 UTC3h 55m

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

Mode-S 400AFF frequently asked

What is Mode-S code 400AFF?
400AFF is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-EUXG.
Where is Mode-S 400AFF registered?
Mode-S code 400AFF 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 400AFF broadcasting right now?
No active broadcast right now. Last signal was 11d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 400AFF, octal 20005377, decimal 4,197,119.
What flights does 400AFF operate?
Mode-S 400AFF has broadcast 20 distinct callsigns, including EFW9RZ, EFW81W, EFW75H, EFW74V, EFW3TW.