sensors Mode-S transponder

408120

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-VEYR · AIRBUS A-330-900

Hex
408120
Octal
20100440
Decimal
4,227,360
Country
GB
Tail
G-VEYR
Type
A339
No current signal · last broadcast 1d ago
Flights observed
6
Distinct callsigns
3
Country
GB
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 408120.

Country allocation

The ICAO 24-bit address 408120 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 3 distinct

Callsign Airline Flights Last seen
VIR165 - 3 2026-04-13
VIR106F Virgin Atlantic Airways 2 2026-04-13
VIR105 - 1 2026-04-12

Recent flights last 6

DateFlightRouteTakeoffLandingDuration
2026-04-13 VIR165 - Apr 13, 16:15 UTCApr 13, 17:05 UTC50m
2026-04-13 VIR165 - Apr 13, 15:50 UTCApr 13, 17:05 UTC1h 15m
2026-04-13 VIR165 - Apr 13, 15:35 UTCApr 13, 16:15 UTC40m
2026-04-13 VIR106F SEA → LHR Apr 13, 09:10 UTCApr 13, 10:25 UTC1h 15m
2026-04-13 VIR106F SEA → LHR Apr 13, 01:35 UTCApr 13, 03:30 UTC1h 55m
2026-04-12 VIR105 - Apr 12, 18:30 UTCApr 12, 19:55 UTC1h 25m

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

Mode-S 408120 frequently asked

What is Mode-S code 408120?
408120 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-VEYR.
Where is Mode-S 408120 registered?
Mode-S code 408120 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 408120 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 408120, octal 20100440, decimal 4,227,360.
What flights does 408120 operate?
Mode-S 408120 has broadcast 3 distinct callsigns, including VIR165, VIR106F, VIR105.