Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

40771A

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-VDOT · AIRBUS A-350-1000

Hex
40771A
Octal
20073432
Decimal
4,224,794
Country
GB
Tail
G-VDOT
Type
A35K
No current signal · last broadcast Jul 26, 19:00 UTC
Flights observed
205
Distinct callsigns
20
Country
GB
Last broadcast
Jul 26, 19:00 UTC

Last known position

Most recent position reported by Mode-S 40771A.

Country allocation

The ICAO 24-bit address 40771A 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
VIR8Y Virgin Atlantic Airways 21 2026-07-21
VIR7B - 20 2026-07-21
VIR103M Virgin Atlantic Airways 20 2026-07-26
VIR104L Virgin Atlantic Airways 19 2026-07-25
VIR153 - 17 2026-07-19
VIR154 Virgin Atlantic Airways 14 2026-07-20
VIR20V Virgin Atlantic Airways 11 2026-07-23
VIR19Z Virgin Atlantic Airways 10 2026-07-22
VIR45W Virgin Atlantic Airways 9 2026-07-24
VIR46K Virgin Atlantic Airways 7 2026-07-24
VIR10H Virgin Atlantic Airways 6 2026-06-07
VIR9J - 5 2026-07-20
VIR157L - 5 2026-07-18
VIR138M Virgin Atlantic Airways 5 2026-07-24
VIR137Y Virgin Atlantic Airways 5 2026-07-23
VIR118 Virgin Atlantic Airways 5 2026-04-17
VIR58N Virgin Atlantic Airways 4 2026-07-19
VIR4C - 4 2026-07-04
VIR302 - 4 2026-07-08
VIR117F Virgin Atlantic Airways 4 2026-04-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 VIR103M LHR → ATL Jul 26, 10:30 UTCJul 26, 18:50 UTC8h 20m
2026-07-25 VIR104L ATL → LHR Jul 25, 22:25 UTCJul 26, 06:00 UTC7h 35m
2026-07-25 VIR103M LHR → ATL Jul 25, 10:50 UTCJul 25, 19:00 UTC8h 10m
2026-07-24 VIR46K JFK → LHR Jul 24, 23:55 UTCJul 25, 06:00 UTC6h 5m
2026-07-24 VIR45W LHR → JFK Jul 24, 12:40 UTCJul 24, 19:20 UTC6h 40m
2026-07-24 VIR138M JFK → LHR Jul 24, 04:20 UTCJul 24, 10:25 UTC6h 5m
2026-07-23 VIR137Y LHR → JFK Jul 23, 18:15 UTCJul 24, 00:50 UTC6h 35m
2026-07-23 VIR20V SFO → LHR Jul 23, 01:15 UTCJul 23, 10:35 UTC9h 20m
2026-07-22 VIR19Z LHR → SFO Jul 22, 12:25 UTCJul 22, 22:40 UTC10h 15m
2026-07-21 VIR8Y LAX → LHR Jul 21, 22:55 UTCJul 22, 02:10 UTC3h 15m
2026-07-21 VIR7B - Jul 21, 09:15 UTCJul 21, 19:30 UTC10h 15m
2026-07-20 VIR46K JFK → LHR Jul 20, 23:45 UTCJul 21, 06:00 UTC6h 15m
2026-07-20 VIR9J - Jul 20, 10:55 UTCJul 20, 17:40 UTC6h 45m
2026-07-20 VIR154 JFK → LHR Jul 20, 01:55 UTCJul 20, 08:20 UTC6h 25m
2026-07-19 VIR153 LHR → JFK Jul 19, 15:25 UTCJul 19, 22:15 UTC6h 50m
2026-07-19 VIR58N BOS → LHR Jul 19, 01:40 UTCJul 19, 07:30 UTC5h 50m
2026-07-18 VIR157L - Jul 18, 15:30 UTCJul 18, 21:55 UTC6h 25m
2026-07-18 VIR20V SFO → LHR Jul 18, 01:20 UTCJul 18, 10:55 UTC9h 36m
2026-07-17 VIR19Z LHR → SFO Jul 17, 12:15 UTCJul 17, 22:45 UTC10h 30m
2026-07-16 VIR104L ATL → LHR Jul 16, 23:44 UTCJul 17, 07:30 UTC7h 45m
2026-07-16 VIR103M - Jul 16, 12:09 UTCJul 16, 20:09 UTC8h 0m
2026-07-16 VIR154 JFK → LHR Jul 16, 03:30 UTCJul 16, 09:50 UTC6h 20m
2026-07-16 VIR153 - Jul 16, 00:15 UTCJul 16, 00:55 UTC40m
2026-07-15 VIR153 - Jul 15, 15:10 UTCJul 15, 22:15 UTC7h 5m
2026-07-15 VIR138M JFK → LHR Jul 15, 05:45 UTCJul 15, 12:05 UTC6h 20m
2026-07-14 VIR137Y LHR → JFK Jul 14, 18:00 UTCJul 15, 00:45 UTC6h 44m
2026-07-14 VIR20V SFO → LHR Jul 14, 01:15 UTCJul 14, 10:40 UTC9h 25m
2026-07-13 VIR19Z - Jul 13, 12:10 UTCJul 13, 22:40 UTC10h 30m
2026-07-12 VIR8Y LAX → LHR Jul 12, 23:00 UTCJul 13, 08:45 UTC9h 45m
2026-07-12 VIR7B LHR → LAX Jul 12, 09:15 UTCJul 12, 19:45 UTC10h 30m
2026-07-11 VIR104L ATL → LHR Jul 11, 23:15 UTCJul 12, 06:35 UTC7h 20m
2026-07-11 VIR103M LHR → ATL Jul 11, 11:10 UTCJul 11, 20:10 UTC9h 0m
2026-07-11 VIR58N BOS → LHR Jul 11, 01:50 UTCJul 11, 07:50 UTC6h 0m
2026-07-10 VIR157L LHR → BOS Jul 10, 15:35 UTCJul 10, 22:20 UTC6h 45m
2026-07-09 VIR8Y LAX → LHR Jul 9, 23:00 UTCJul 10, 08:35 UTC9h 35m
2026-07-09 VIR7B LHR → LAX Jul 9, 09:15 UTCJul 9, 19:45 UTC10h 30m
2026-07-08 VIR303 - Jul 8, 21:25 UTCJul 9, 06:00 UTC8h 35m
2026-07-08 VIR302 - Jul 8, 16:40 UTCJul 8, 17:40 UTC1h 0m
2026-07-08 VIR302 - Jul 8, 10:05 UTCJul 8, 14:30 UTC4h 25m
2026-07-07 VIR20V - Jul 7, 01:40 UTCJul 7, 11:00 UTC9h 20m
2026-07-06 VIR19Z - Jul 6, 12:40 UTCJul 6, 23:15 UTC10h 35m
2026-07-06 VIR8Y LAX → LHR Jul 6, 00:30 UTCJul 6, 10:10 UTC9h 40m
2026-07-05 VIR7B - Jul 5, 09:25 UTCJul 5, 19:50 UTC10h 25m
2026-07-04 VIR4C JFK → LHR Jul 4, 22:50 UTCJul 5, 05:10 UTC6h 20m
2026-07-04 VIR3N - Jul 4, 08:10 UTCJul 4, 15:15 UTC7h 5m
2026-07-03 VIR4C JFK → LHR Jul 3, 22:35 UTCJul 4, 05:05 UTC6h 30m
2026-07-03 VIR9J - Jul 3, 11:00 UTCJul 3, 18:05 UTC7h 5m
2026-07-02 VIR8Y - Jul 2, 22:55 UTCJul 3, 08:20 UTC9h 25m
2026-07-02 VIR7B - Jul 2, 09:20 UTCJul 2, 20:00 UTC10h 40m
2026-07-01 VIR46K JFK → LHR Jul 1, 23:50 UTCJul 2, 05:50 UTC6h 0m

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

Mode-S 40771A frequently asked

What is Mode-S code 40771A?
40771A is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-VDOT.
Where is Mode-S 40771A registered?
Mode-S code 40771A 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 40771A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 40771A, octal 20073432, decimal 4,224,794.
What flights does 40771A operate?
Mode-S 40771A has broadcast 20 distinct callsigns, including VIR8Y, VIR7B, VIR103M, VIR104L, VIR153.