Apparatus

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sensors Mode-S transponder

407E21

ICAO 24-bit transponder address · allocated to United Kingdom

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

Hex
407E21
Octal
20077041
Decimal
4,226,593
Country
GB
Tail
G-VLDY
Type
A339
No current signal · last broadcast 2h ago
Flights observed
120
Distinct callsigns
20
Country
GB
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 407E21.

Country allocation

The ICAO 24-bit address 407E21 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 16 2026-05-29
VIR106F Virgin Atlantic Airways 10 2026-05-30
VIR137Y Virgin Atlantic Airways 8 2026-05-18
VIR10H Virgin Atlantic Airways 8 2026-05-21
VIR58N Virgin Atlantic Airways 7 2026-05-21
VIR157L Virgin Atlantic Airways 7 2026-05-20
VIR166G Virgin Atlantic Airways 6 2026-05-19
VIR138M Virgin Atlantic Airways 6 2026-05-19
VIR9J Virgin Atlantic Airways 4 2026-05-24
VIR48J Virgin Atlantic Airways 4 2026-05-18
VIR45W Virgin Atlantic Airways 4 2026-05-27
VIR197G Virgin Atlantic Airways 4 2026-04-22
VIR130C Virgin Atlantic Airways 4 2026-04-16
VIR6J Virgin Atlantic Airways 3 2026-05-22
VIR5C Virgin Atlantic Airways 3 2026-05-22
VIR46K Virgin Atlantic Airways 3 2026-05-27
VIR129R Virgin Atlantic Airways 3 2026-04-15
VIR4C Virgin Atlantic Airways 2 2026-05-24
VIR47M Virgin Atlantic Airways 2 2026-05-17
VIR3N Virgin Atlantic Airways 2 2026-05-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 VIR106F SEA → LHR May 30, 02:00 UTCMay 30, 03:20 UTC1h 20m
2026-05-29 VIR105 LHR → SEA May 29, 11:10 UTCMay 29, 20:35 UTC9h 25m
2026-05-29 VIR186U BGI → LHR May 29, 06:50 UTCMay 29, 08:00 UTC1h 10m
2026-05-28 VIR185V LHR → BGI May 28, 08:50 UTCMay 29, 08:00 UTC23h 10m
2026-05-27 VIR46K JFK → LHR May 27, 23:40 UTCMay 28, 06:10 UTC6h 30m
2026-05-27 VIR45W LHR → JFK May 27, 11:20 UTCMay 27, 18:05 UTC6h 45m
2026-05-27 VIR188Q BGI → LHR May 27, 04:49 UTCMay 27, 08:00 UTC3h 10m
2026-05-26 VIR187W LHR → BGI May 26, 09:04 UTCMay 27, 04:55 UTC19h 50m
2026-05-25 VIR46K JFK → LHR May 25, 23:49 UTCMay 26, 06:20 UTC6h 30m
2026-05-25 VIR3N LHR → JFK May 25, 07:45 UTCMay 25, 14:50 UTC7h 5m
2026-05-24 VIR4C JFK → LHR May 24, 23:00 UTCMay 25, 05:20 UTC6h 20m
2026-05-24 VIR9J LHR → JFK May 24, 10:55 UTCMay 24, 18:00 UTC7h 5m
2026-05-22 VIR6J MIA → LHR May 22, 22:20 UTCMay 23, 06:30 UTC8h 10m
2026-05-22 VIR5C LHR → MIA May 22, 10:25 UTCMay 22, 19:25 UTC9h 0m
2026-05-21 VIR10H JFK → LHR May 21, 23:40 UTCMay 22, 05:40 UTC6h 0m
2026-05-21 VIR9J LHR → JFK May 21, 10:45 UTCMay 21, 17:50 UTC7h 5m
2026-05-21 VIR58N BOS → LHR May 21, 02:20 UTCMay 21, 08:30 UTC6h 10m
2026-05-20 VIR157L LHR → BOS May 20, 16:35 UTCMay 20, 23:25 UTC6h 50m
2026-05-19 VIR166G MBJ → LHR May 19, 22:00 UTCMay 20, 13:00 UTC15h 1m
2026-05-19 VIR165 LHR → MBJ May 19, 16:20 UTCMay 20, 13:00 UTC20h 41m
2026-05-19 VIR165 LHR → MBJ May 19, 15:35 UTCMay 20, 13:00 UTC21h 26m
2026-05-19 VIR138M JFK → LHR May 19, 03:50 UTCMay 19, 10:35 UTC6h 45m
2026-05-18 VIR137Y LHR → JFK May 18, 18:15 UTCMay 19, 01:20 UTC7h 4m
2026-05-18 VIR48J JFK → LHR May 18, 06:40 UTCMay 18, 13:15 UTC6h 35m
2026-05-17 VIR47M LHR → JFK May 17, 16:01 UTCMay 17, 23:20 UTC7h 20m
2026-05-17 VIR106F SEA → LHR May 17, 01:55 UTCMay 17, 10:50 UTC8h 55m
2026-05-16 VIR105 LHR → SEA May 16, 11:11 UTCMay 16, 20:05 UTC8h 55m
2026-05-16 VIR58N BOS → LHR May 16, 01:45 UTCMay 16, 07:35 UTC5h 51m
2026-05-15 VIR157L LHR → BOS May 15, 22:05 UTCMay 15, 23:10 UTC1h 5m
2026-05-15 VIR157L LHR → BOS May 15, 16:20 UTCMay 15, 22:00 UTC5h 40m
2026-05-15 VIR166G MBJ → LHR May 15, 05:50 UTCMay 15, 13:20 UTC7h 30m
2026-05-14 VIR166G MBJ → LHR May 14, 17:15 UTCMay 15, 13:20 UTC20h 5m
2026-05-14 VIR138M JFK → LHR May 14, 05:30 UTCMay 14, 12:00 UTC6h 30m
2026-05-13 VIR137Y LHR → JFK May 13, 20:00 UTCMay 14, 03:10 UTC7h 10m
2026-05-13 VIR106F SEA → LHR May 13, 01:40 UTCMay 13, 10:45 UTC9h 5m
2026-05-12 VIR105 LHR → SEA May 12, 11:00 UTCMay 12, 20:35 UTC9h 35m
2026-05-11 VIR106F SEA → LHR May 11, 01:34 UTCMay 11, 10:35 UTC9h 0m
2026-05-10 VIR105 LHR → SEA May 10, 10:55 UTCMay 10, 20:40 UTC9h 45m
2026-05-10 VIR58N BOS → LHR May 10, 01:55 UTCMay 10, 08:20 UTC6h 25m
2026-05-09 VIR157L LHR → BOS May 9, 16:15 UTCMay 9, 22:55 UTC6h 40m
2026-05-09 VIR48J JFK → LHR May 9, 11:40 UTCMay 9, 13:05 UTC1h 25m
2026-05-09 VIR48J JFK → LHR May 9, 06:25 UTCMay 9, 08:00 UTC1h 35m
2026-05-08 VIR47M LHR → JFK May 8, 15:35 UTCMay 8, 22:40 UTC7h 5m
2026-05-08 VIR106F SEA → LHR May 8, 03:35 UTCMay 8, 12:39 UTC9h 5m
2026-05-07 VIR105 LHR → SEA May 7, 11:05 UTCMay 7, 20:10 UTC9h 5m
2026-05-06 VIR10H JFK → LHR May 6, 23:10 UTCMay 7, 05:35 UTC6h 25m
2026-05-06 VIR45W LHR → JFK May 6, 11:05 UTCMay 6, 18:25 UTC7h 19m
2026-05-06 VIR46K JFK → LHR May 6, 00:01 UTCMay 6, 06:25 UTC6h 24m
2026-05-05 VIR3N LHR → JFK May 5, 07:40 UTCMay 5, 14:35 UTC6h 55m
2026-05-04 VIR48J JFK → LHR May 4, 06:20 UTCMay 4, 12:55 UTC6h 35m

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

Mode-S 407E21 frequently asked

What is Mode-S code 407E21?
407E21 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-VLDY.
Where is Mode-S 407E21 registered?
Mode-S code 407E21 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 407E21 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 407E21, octal 20077041, decimal 4,226,593.
What flights does 407E21 operate?
Mode-S 407E21 has broadcast 20 distinct callsigns, including VIR105, VIR106F, VIR137Y, VIR10H, VIR58N.