Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

401240

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-EUUT · AIRBUS A-320

Hex
401240
Octal
20011100
Decimal
4,198,976
Country
GB
Tail
G-EUUT
Type
A320
No current signal · last broadcast Jul 26, 22:00 UTC
Flights observed
374
Distinct callsigns
20
Country
GB
Last broadcast
Jul 26, 22:00 UTC

Last known position

Most recent position reported by Mode-S 401240.

Country allocation

The ICAO 24-bit address 401240 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
EFW527R - 11 2026-07-19
EFW62T - 8 2026-07-07
EFW4SS - 8 2026-07-07
EFW4LY - 8 2026-07-03
EFW9RZ BA Euroflyer 7 2026-07-24
EFW979Y - 7 2026-07-12
EFW6KJ BA Euroflyer 7 2026-07-19
EFW39YP - 7 2026-07-12
EFW2FC - 7 2026-07-03
EFW26BF BA Euroflyer 7 2026-05-20
EFW12LS BA Euroflyer 7 2026-07-24
EFW8CQ BA Euroflyer 6 2026-05-20
EFW75J - 6 2026-06-28
EFW75H BA Euroflyer 6 2026-05-23
EFW73AW BA Euroflyer 6 2026-07-17
EFW63N BA Euroflyer 6 2026-05-15
EFW5BP - 6 2026-07-06
EFW3TW BA Euroflyer 6 2026-05-23
EFW34BY - 6 2026-06-28
EFW2BS - 6 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EFW74V KGS → LGW Jul 26, 18:10 UTCJul 26, 22:00 UTC3h 50m
2026-07-26 EFW81W LGW → KGS Jul 26, 13:05 UTCJul 26, 16:15 UTC3h 10m
2026-07-24 EFW3MG SVQ → LGW Jul 24, 19:20 UTCJul 24, 21:25 UTC2h 5m
2026-07-24 EFW22D LGW → SVQ Jul 24, 16:00 UTCJul 24, 18:20 UTC2h 20m
2026-07-24 EFW12LS MLA → LGW Jul 24, 11:30 UTCJul 24, 14:20 UTC2h 50m
2026-07-24 EFW9RZ LGW → MLA Jul 24, 07:55 UTCJul 24, 10:30 UTC2h 35m
2026-07-23 EFW265E IBZ → LGW Jul 23, 21:05 UTCJul 23, 23:20 UTC2h 15m
2026-07-23 EFW370K LGW → IBZ Jul 23, 18:00 UTCJul 23, 20:00 UTC2h 0m
2026-07-23 EFW81PT LPA → LGW Jul 23, 13:15 UTCJul 23, 16:40 UTC3h 25m
2026-07-23 EFW33VR LGW → LPA Jul 23, 07:45 UTCJul 23, 11:20 UTC3h 35m
2026-07-22 EFW42YR IBZ → LGW Jul 22, 17:20 UTCJul 22, 19:20 UTC2h 0m
2026-07-22 EFW15AV LGW → IBZ Jul 22, 14:10 UTCJul 22, 16:05 UTC1h 55m
2026-07-22 EFW29BA MAH → LGW Jul 22, 11:10 UTCJul 22, 12:45 UTC1h 35m
2026-07-21 EFW2627 SZG → LGW Jul 21, 19:20 UTCJul 21, 21:00 UTC1h 40m
2026-07-21 EFW6JW LGW → SZG Jul 21, 16:55 UTCJul 21, 18:25 UTC1h 30m
2026-07-21 EFW12LS MLA → LGW Jul 21, 12:30 UTCJul 21, 15:35 UTC3h 5m
2026-07-21 EFW9RZ LGW → MLA Jul 21, 08:25 UTCJul 21, 11:05 UTC2h 40m
2026-07-20 EFW9TT GRZ → LGW Jul 20, 19:10 UTCJul 20, 21:05 UTC1h 55m
2026-07-20 EFW8CD LGW → GRZ Jul 20, 16:20 UTCJul 20, 18:00 UTC1h 40m
2026-07-20 EFW91BM - Jul 20, 14:50 UTCJul 20, 15:10 UTC20m
2026-07-20 EFW91BM - Jul 20, 11:55 UTCJul 20, 14:40 UTC2h 45m
2026-07-20 EFW9UQ - Jul 20, 07:40 UTCJul 20, 10:00 UTC2h 20m
2026-07-19 EFW811N OPO → LGW Jul 19, 20:40 UTCJul 19, 22:25 UTC1h 45m
2026-07-19 EFW568X LGW → OPO Jul 19, 17:45 UTCJul 19, 19:35 UTC1h 50m
2026-07-19 EFW6KJ FNC → LGW Jul 19, 12:40 UTCJul 19, 15:55 UTC3h 15m
2026-07-19 EFW527R - Jul 19, 11:20 UTCJul 19, 11:30 UTC10m
2026-07-19 EFW527R - Jul 19, 08:05 UTCJul 19, 10:40 UTC2h 35m
2026-07-18 EFW19YZ BOD → LGW Jul 18, 19:45 UTCJul 18, 20:55 UTC1h 10m
2026-07-18 EFW45L LGW → BOD Jul 18, 17:25 UTCJul 18, 18:40 UTC1h 15m
2026-07-18 EFW6KJ FNC → LGW Jul 18, 12:30 UTCJul 18, 15:40 UTC3h 10m
2026-07-18 EFW527R - Jul 18, 11:00 UTCJul 18, 11:10 UTC10m
2026-07-18 EFW527R - Jul 18, 07:35 UTCJul 18, 10:15 UTC2h 40m
2026-07-17 EFW193M CTA → LGW Jul 17, 17:05 UTCJul 17, 19:49 UTC2h 45m
2026-07-17 EFW73AW LGW → CTA Jul 17, 13:00 UTCJul 17, 15:25 UTC2h 25m
2026-07-17 EFW29BA MAH → LGW Jul 17, 09:30 UTCJul 17, 11:20 UTC1h 50m
2026-07-17 EFW39VE LGW → MAH Jul 17, 06:15 UTCJul 17, 08:15 UTC2h 0m
2026-07-16 EFW5BR JER → LGW Jul 16, 19:30 UTCJul 16, 20:00 UTC30m
2026-07-16 EFW56R LGW → JER Jul 16, 17:49 UTCJul 16, 18:29 UTC40m
2026-07-16 EFW6KJ FNC → LGW Jul 16, 12:20 UTCJul 16, 15:25 UTC3h 5m
2026-07-16 EFW527R - Jul 16, 11:05 UTCJul 16, 11:10 UTC5m
2026-07-16 EFW527R - Jul 16, 07:50 UTCJul 16, 10:25 UTC2h 35m
2026-07-15 EFW2BS - Jul 15, 20:05 UTCJul 15, 22:35 UTC2h 30m
2026-07-15 EFW1BS LGW → RBA Jul 15, 15:45 UTCJul 15, 18:50 UTC3h 5m
2026-07-15 EFW4PL - Jul 15, 12:25 UTCJul 15, 14:15 UTC1h 50m
2026-07-15 EFW8DD LGW → SZG Jul 15, 08:25 UTCJul 15, 09:50 UTC1h 25m
2026-07-14 EFW8MJ FNC → LGW Jul 14, 18:40 UTCJul 14, 21:45 UTC3h 5m
2026-07-14 EFW8NM - Jul 14, 17:35 UTCJul 14, 17:40 UTC5m
2026-07-14 EFW8NM - Jul 14, 14:10 UTCJul 14, 16:55 UTC2h 45m
2026-07-14 EFW29BA - Jul 14, 10:50 UTCJul 14, 12:45 UTC1h 55m
2026-07-14 EFW39VE - Jul 14, 07:35 UTCJul 14, 09:30 UTC1h 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-EUUT page for operator, model, and routing details .

Mode-S 401240 frequently asked

What is Mode-S code 401240?
401240 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-EUUT.
Where is Mode-S 401240 registered?
Mode-S code 401240 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 401240 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 401240, octal 20011100, decimal 4,198,976.
What flights does 401240 operate?
Mode-S 401240 has broadcast 20 distinct callsigns, including EFW527R, EFW62T, EFW4SS, EFW4LY, EFW9RZ.