sensors Mode-S transponder

408034

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-SUNL · AIRBUS A-321neo

Hex
408034
Octal
20100064
Decimal
4,227,124
Country
GB
Tail
G-SUNL
Type
A21N
Broadcasting now · callsign EXS614A · 36,000 ft
Flights observed
12
Distinct callsigns
7
Country
GB
Last broadcast
14h ago

Current position

408034 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 408034 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 7 distinct

Callsign Airline Flights Last seen
EXS73P - 3 2026-04-13
EXS1XT - 3 2026-04-13
EXS3807 - 2 2026-04-14
EXS98E - 1 2026-04-12
EXS64PY - 1 2026-04-12
EXS59JM - 1 2026-04-13
EXS129W Jet2.com 1 2026-04-13

Recent flights last 12

DateFlightRouteTakeoffLandingDuration
2026-04-14 EXS3807 - Apr 14, 07:10 UTCApr 14, 08:50 UTC1h 40m
2026-04-14 EXS3807 - Apr 14, 05:45 UTCApr 14, 07:10 UTC1h 25m
2026-04-13 EXS1XT - Apr 13, 19:50 UTCApr 13, 21:35 UTC1h 45m
2026-04-13 EXS1XT - Apr 13, 19:00 UTCApr 13, 20:10 UTC1h 10m
2026-04-13 EXS1XT - Apr 13, 18:00 UTCApr 13, 18:10 UTC10m
2026-04-13 EXS73P - Apr 13, 16:15 UTCApr 13, 16:20 UTC5m
2026-04-13 EXS73P - Apr 13, 15:50 UTCApr 13, 16:20 UTC30m
2026-04-13 EXS73P - Apr 13, 13:05 UTCApr 13, 16:15 UTC3h 10m
2026-04-13 EXS59JM FAO → LTN Apr 13, 09:10 UTCApr 13, 11:45 UTC2h 35m
2026-04-13 EXS129W LTN → FAO Apr 13, 05:10 UTCApr 13, 07:20 UTC2h 10m
2026-04-12 EXS64PY - Apr 12, 23:55 UTCApr 13, 00:10 UTC15m
2026-04-12 EXS98E - Apr 12, 17:15 UTCApr 12, 18:45 UTC1h 30m

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

Mode-S 408034 frequently asked

What is Mode-S code 408034?
408034 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-SUNL.
Where is Mode-S 408034 registered?
Mode-S code 408034 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 408034 broadcasting right now?
Yes. Mode-S 408034 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 408034, octal 20100064, decimal 4,227,124.
What flights does 408034 operate?
Mode-S 408034 has broadcast 7 distinct callsigns, including EXS73P, EXS1XT, EXS3807, EXS98E, EXS64PY.