Apparatus

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sensors Mode-S transponder

408121

ICAO 24-bit transponder address · allocated to United Kingdom

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

Hex
408121
Octal
20100441
Decimal
4,227,361
Country
GB
Tail
G-VPIE
Type
A339
Transponder active on ground
Flights observed
118
Distinct callsigns
20
Country
GB
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 408121.

Country allocation

The ICAO 24-bit address 408121 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
VIR105 Virgin Atlantic Airways 13 2026-05-27
VIR106F Virgin Atlantic Airways 12 2026-05-28
VIR157L Virgin Atlantic Airways 9 2026-05-26
VIR58N Virgin Atlantic Airways 8 2026-05-27
VIR22Q Virgin Atlantic Airways 8 2026-04-16
VIR5C Virgin Atlantic Airways 7 2026-05-07
VIR166G Virgin Atlantic Airways 7 2026-05-21
VIR138M Virgin Atlantic Airways 7 2026-05-29
VIR137Y Virgin Atlantic Airways 7 2026-05-28
VIR6J Virgin Atlantic Airways 6 2026-05-07
VIR21K Virgin Atlantic Airways 6 2026-04-15
VIR153 Virgin Atlantic Airways 5 2026-04-20
VIR9J Virgin Atlantic Airways 4 2026-05-06
VIR47M Virgin Atlantic Airways 4 2026-05-29
VIR48J Virgin Atlantic Airways 3 2026-05-11
VIR46K Virgin Atlantic Airways 3 2026-05-06
VIR4C Virgin Atlantic Airways 2 2026-05-05
VIR165 Virgin Atlantic Airways 2 2026-05-21
VIR154 Virgin Atlantic Airways 2 2026-04-21
VIR3N Virgin Atlantic Airways 1 2026-05-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 VIR47M LHR → JFK May 29, 15:20 UTCMay 29, 22:15 UTC6h 55m
2026-05-29 VIR138M JFK → LHR May 29, 04:10 UTCMay 29, 10:50 UTC6h 40m
2026-05-28 VIR137Y LHR → JFK May 28, 18:10 UTCMay 29, 00:55 UTC6h 45m
2026-05-28 VIR106F SEA → LHR May 28, 01:35 UTCMay 28, 10:50 UTC9h 15m
2026-05-27 VIR105 LHR → SEA May 27, 11:00 UTCMay 27, 20:50 UTC9h 50m
2026-05-27 VIR58N BOS → LHR May 27, 01:44 UTCMay 27, 08:10 UTC6h 25m
2026-05-26 VIR157L LHR → BOS May 26, 16:40 UTCMay 26, 23:14 UTC6h 35m
2026-05-26 VIR106F SEA → LHR May 26, 01:49 UTCMay 26, 10:44 UTC8h 55m
2026-05-25 VIR105 LHR → SEA May 25, 11:00 UTCMay 25, 20:30 UTC9h 29m
2026-05-24 VIR106F SEA → LHR May 24, 01:45 UTCMay 24, 10:40 UTC8h 55m
2026-05-23 VIR105 LHR → SEA May 23, 11:00 UTCMay 23, 20:30 UTC9h 31m
2026-05-23 VIR58N BOS → LHR May 23, 01:50 UTCMay 23, 07:40 UTC5h 50m
2026-05-22 VIR157L LHR → BOS May 22, 16:10 UTCMay 22, 22:40 UTC6h 30m
2026-05-21 VIR166G MBJ → LHR May 21, 22:05 UTCMay 22, 12:45 UTC14h 39m
2026-05-21 VIR166G MBJ → LHR May 21, 16:20 UTCMay 22, 12:45 UTC20h 24m
2026-05-21 VIR165 LHR → MBJ May 21, 15:25 UTCMay 22, 12:45 UTC21h 20m
2026-05-21 VIR138M JFK → LHR May 21, 05:00 UTCMay 21, 11:15 UTC6h 15m
2026-05-20 VIR137Y LHR → JFK May 20, 18:05 UTCMay 21, 01:45 UTC7h 40m
2026-05-20 VIR106F SEA → LHR May 20, 01:45 UTCMay 20, 10:55 UTC9h 11m
2026-05-19 VIR105 LHR → SEA May 19, 11:00 UTCMay 19, 20:05 UTC9h 5m
2026-05-18 VIR138M JFK → LHR May 18, 03:50 UTCMay 18, 10:05 UTC6h 15m
2026-05-17 VIR137Y LHR → JFK May 17, 18:01 UTCMay 18, 01:10 UTC7h 10m
2026-05-17 VIR138M JFK → LHR May 17, 03:50 UTCMay 17, 10:20 UTC6h 30m
2026-05-16 VIR137Y LHR → JFK May 16, 17:50 UTCMay 17, 01:05 UTC7h 15m
2026-05-16 VIR138M JFK → LHR May 16, 04:00 UTCMay 16, 10:16 UTC6h 16m
2026-05-15 VIR47M LHR → JFK May 15, 15:40 UTCMay 15, 22:50 UTC7h 10m
2026-05-15 VIR106F SEA → LHR May 15, 03:30 UTCMay 15, 12:20 UTC8h 50m
2026-05-14 VIR105 LHR → SEA May 14, 11:15 UTCMay 14, 20:50 UTC9h 35m
2026-05-14 VIR58N BOS → LHR May 14, 03:00 UTCMay 14, 09:00 UTC6h 0m
2026-05-13 VIR157L LHR → BOS May 13, 18:20 UTCMay 14, 01:00 UTC6h 40m
2026-05-13 VIR166G MBJ → LHR May 13, 11:25 UTCMay 13, 13:00 UTC1h 35m
2026-05-12 VIR166G MBJ → LHR May 12, 16:20 UTCMay 13, 13:00 UTC20h 40m
2026-05-12 VIR166G MBJ → LHR May 12, 15:10 UTCMay 13, 13:00 UTC21h 50m
2026-05-12 VIR138M JFK → LHR May 12, 04:05 UTCMay 12, 10:30 UTC6h 25m
2026-05-11 VIR137Y LHR → JFK May 11, 18:15 UTCMay 11, 19:20 UTC1h 5m
2026-05-11 VIR48J JFK → LHR May 11, 06:25 UTCMay 11, 12:40 UTC6h 15m
2026-05-10 VIR47M LHR → JFK May 10, 15:55 UTCMay 10, 23:05 UTC7h 10m
2026-05-10 VIR138M JFK → LHR May 10, 03:50 UTCMay 10, 10:24 UTC6h 35m
2026-05-09 VIR137Y LHR → JFK May 9, 17:55 UTCMay 10, 00:45 UTC6h 50m
2026-05-09 VIR106F SEA → LHR May 9, 01:40 UTCMay 9, 10:55 UTC9h 15m
2026-05-08 VIR105 LHR → SEA May 8, 11:09 UTCMay 8, 20:30 UTC9h 20m
2026-05-07 VIR6J MIA → LHR May 7, 22:20 UTCMay 8, 06:25 UTC8h 5m
2026-05-07 VIR5C LHR → MIA May 7, 10:15 UTCMay 7, 19:15 UTC9h 0m
2026-05-06 VIR46K JFK → LHR May 6, 23:45 UTCMay 7, 06:10 UTC6h 25m
2026-05-06 VIR9J LHR → JFK May 6, 10:45 UTCMay 6, 18:10 UTC7h 24m
2026-05-05 VIR4C JFK → LHR May 5, 22:50 UTCMay 6, 05:20 UTC6h 29m
2026-05-05 VIR9J LHR → JFK May 5, 10:50 UTCMay 5, 17:55 UTC7h 5m
2026-05-04 VIR46K JFK → LHR May 4, 23:35 UTCMay 5, 06:00 UTC6h 25m
2026-05-04 VIR3N LHR → JFK May 4, 07:50 UTCMay 4, 14:50 UTC7h 0m
2026-05-02 VIR6J MIA → LHR May 2, 22:30 UTCMay 3, 06:45 UTC8h 14m

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

Mode-S 408121 frequently asked

What is Mode-S code 408121?
408121 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-VPIE.
Where is Mode-S 408121 registered?
Mode-S code 408121 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 408121 broadcasting right now?
Mode-S 408121 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 408121, octal 20100441, decimal 4,227,361.
What flights does 408121 operate?
Mode-S 408121 has broadcast 20 distinct callsigns, including VIR105, VIR106F, VIR157L, VIR58N, VIR22Q.