Apparatus

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sensors Mode-S transponder

406B4A

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-VOOH · BOEING 787-9 Dreamliner

Hex
406B4A
Octal
20065512
Decimal
4,221,770
Country
GB
Tail
G-VOOH
Type
B789
No current signal · last broadcast 1h ago
Flights observed
113
Distinct callsigns
20
Country
GB
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 406B4A.

Country allocation

The ICAO 24-bit address 406B4A 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
VIR208 Virgin Atlantic Airways 8 2026-05-18
VIR316 Virgin Atlantic Airways 7 2026-05-15
VIR26Q Virgin Atlantic Airways 7 2026-04-28
VIR25B Virgin Atlantic Airways 7 2026-04-27
VIR12E Virgin Atlantic Airways 7 2026-05-07
VIR450 Virgin Atlantic Airways 6 2026-05-27
VIR449 Virgin Atlantic Airways 6 2026-05-26
VIR317 Virgin Atlantic Airways 6 2026-05-16
VIR22Q Virgin Atlantic Airways 6 2026-05-23
VIR21K Virgin Atlantic Airways 6 2026-05-22
VIR355 Virgin Atlantic Airways 5 2026-05-19
VIR300 Virgin Atlantic Airways 5 2026-05-28
VIR209 Virgin Atlantic Airways 5 2026-05-18
VIR11B Virgin Atlantic Airways 5 2026-05-06
VIR354 Virgin Atlantic Airways 3 2026-05-18
VIR301 Virgin Atlantic Airways 3 2026-05-29
VIR23X Virgin Atlantic Airways 3 2026-05-29
VIR24M Virgin Atlantic Airways 2 2026-05-06
VIR156T Virgin Atlantic Airways 2 2026-05-25
VIR155M Virgin Atlantic Airways 2 2026-05-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 VIR23X LHR → LAX May 29, 17:40 UTCMay 30, 03:55 UTC10h 15m
2026-05-29 VIR301 DEL → LHR May 29, 06:05 UTCMay 29, 15:05 UTC9h 0m
2026-05-28 VIR300 LHR → DEL May 28, 19:40 UTCMay 29, 03:10 UTC7h 30m
2026-05-27 VIR450 JNB → LHR May 27, 18:30 UTCMay 28, 05:10 UTC10h 40m
2026-05-26 VIR449 LHR → JNB May 26, 20:34 UTCMay 27, 06:55 UTC10h 20m
2026-05-26 VIR42X SFO → LHR May 26, 07:34 UTCMay 26, 16:59 UTC9h 25m
2026-05-25 VIR41R LHR → SFO May 25, 17:55 UTCMay 26, 05:00 UTC11h 5m
2026-05-25 VIR156T LAS → LHR May 25, 05:05 UTCMay 25, 14:30 UTC9h 25m
2026-05-24 VIR155M LHR → LAS May 24, 16:50 UTCMay 25, 02:45 UTC9h 55m
2026-05-24 VIR142 LAX → LHR May 24, 03:40 UTCMay 24, 13:25 UTC9h 45m
2026-05-23 VIR141 LHR → LAX May 23, 13:55 UTCMay 24, 00:20 UTC10h 25m
2026-05-23 VIR22Q IAD → LHR May 23, 03:25 UTCMay 23, 09:45 UTC6h 20m
2026-05-22 VIR21K LHR → IAD May 22, 17:15 UTCMay 23, 00:30 UTC7h 15m
2026-05-22 VIR118 MIA → LHR May 22, 02:55 UTCMay 22, 10:45 UTC7h 50m
2026-05-21 VIR117F LHR → MIA May 21, 15:10 UTCMay 22, 00:05 UTC8h 55m
2026-05-20 VIR450 JNB → LHR May 20, 19:00 UTCMay 21, 05:40 UTC10h 40m
2026-05-19 VIR449 LHR → JNB May 19, 21:15 UTCMay 20, 07:10 UTC9h 56m
2026-05-19 VIR355 BOM → LHR May 19, 06:25 UTCMay 19, 15:35 UTC9h 10m
2026-05-18 VIR354 LHR → BOM May 18, 19:10 UTCMay 19, 04:05 UTC8h 55m
2026-05-18 VIR209 ICN → LHR May 18, 04:45 UTCMay 18, 17:00 UTC12h 15m
2026-05-18 VIR209 ICN → LHR May 18, 03:40 UTCMay 18, 03:50 UTC10m
2026-05-18 VIR208 LHR → ICN May 18, 00:05 UTCMay 18, 00:20 UTC15m
2026-05-17 VIR208 LHR → ICN May 17, 12:40 UTCMay 17, 23:15 UTC10h 35m
2026-05-17 VIR22Q IAD → LHR May 17, 03:15 UTCMay 17, 09:55 UTC6h 40m
2026-05-16 VIR21K LHR → IAD May 16, 17:15 UTCMay 17, 00:45 UTC7h 29m
2026-05-16 VIR317 BLR → LHR May 16, 03:35 UTCMay 16, 12:45 UTC9h 11m
2026-05-15 VIR316 LHR → BLR May 15, 15:10 UTCMay 16, 00:30 UTC9h 20m
2026-05-15 VIR22Q IAD → LHR May 15, 04:30 UTCMay 15, 11:00 UTC6h 30m
2026-05-14 VIR21K LHR → IAD May 14, 19:00 UTCMay 15, 02:30 UTC7h 30m
2026-05-13 VIR209 ICN → LHR May 13, 11:45 UTCMay 13, 17:25 UTC5h 40m
2026-05-13 VIR208 LHR → ICN May 13, 00:25 UTCMay 13, 00:35 UTC10m
2026-05-12 VIR208 LHR → ICN May 12, 12:50 UTCMay 12, 17:40 UTC4h 50m
2026-05-11 VIR450 JNB → LHR May 11, 19:05 UTCMay 12, 05:45 UTC10h 40m
2026-05-10 VIR449 LHR → JNB May 10, 22:20 UTCMay 11, 08:20 UTC10h 0m
2026-05-10 VIR209 ICN → LHR May 10, 12:10 UTCMay 10, 17:15 UTC5h 5m
2026-05-10 VIR208 LHR → ICN May 10, 00:09 UTCMay 10, 00:24 UTC15m
2026-05-09 VIR208 LHR → ICN May 9, 12:45 UTCMay 9, 23:20 UTC10h 35m
2026-05-09 VIR22Q IAD → LHR May 9, 03:40 UTCMay 9, 10:20 UTC6h 40m
2026-05-08 VIR21K LHR → IAD May 8, 18:30 UTCMay 9, 01:50 UTC7h 20m
2026-05-07 VIR355 BOM → LHR May 7, 20:35 UTCMay 8, 16:20 UTC19h 45m
2026-05-07 VIR355 BOM → LHR May 7, 19:15 UTCMay 8, 16:20 UTC21h 5m
2026-05-07 VIR12E BOS → LHR May 7, 03:25 UTCMay 7, 09:25 UTC6h 0m
2026-05-06 VIR11B LHR → BOS May 6, 18:10 UTCMay 7, 00:45 UTC6h 35m
2026-05-06 VIR24M LAX → LHR May 6, 06:25 UTCMay 6, 16:05 UTC9h 40m
2026-05-05 VIR23X LHR → LAX May 5, 17:45 UTCMay 6, 03:45 UTC10h 0m
2026-05-05 VIR156T LAS → LHR May 5, 05:15 UTCMay 5, 14:40 UTC9h 25m
2026-05-04 VIR155M LHR → LAS May 4, 16:55 UTCMay 5, 02:55 UTC10h 1m
2026-05-04 VIR317 BLR → LHR May 4, 04:15 UTCMay 4, 13:10 UTC8h 55m
2026-05-04 VIR317 BLR → LHR May 4, 02:50 UTCMay 4, 03:00 UTC10m
2026-05-04 VIR316 LHR → BLR May 4, 00:19 UTCMay 4, 00:30 UTC10m

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

Mode-S 406B4A frequently asked

What is Mode-S code 406B4A?
406B4A is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-VOOH.
Where is Mode-S 406B4A registered?
Mode-S code 406B4A 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 406B4A broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 406B4A, octal 20065512, decimal 4,221,770.
What flights does 406B4A operate?
Mode-S 406B4A has broadcast 20 distinct callsigns, including VIR208, VIR316, VIR26Q, VIR25B, VIR12E.