Apparatus

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sensors Mode-S transponder

400774

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-VIIW · BOEING 777-200

Hex
400774
Octal
20003564
Decimal
4,196,212
Country
GB
Tail
G-VIIW
Type
B772
No current signal · last broadcast 12h ago
Flights observed
174
Distinct callsigns
20
Country
GB
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S 400774.

Country allocation

The ICAO 24-bit address 400774 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
BAW7CP British Airways 13 2026-06-25
BAW6AC - 12 2026-06-26
BAW25GP British Airways 7 2026-05-26
BAW82 - 6 2026-07-12
BAW7W - 6 2026-06-27
BAW298 - 6 2026-07-02
BAW255T British Airways 6 2026-05-25
BAW216 - 6 2026-06-27
BAW19N British Airways 6 2026-06-21
BAW18B - 6 2026-06-23
BAW299 - 5 2026-07-01
BAW183 - 5 2026-07-12
BAW178 - 5 2026-07-13
BAW7NY - 4 2026-06-30
BAW53M - 4 2026-06-24
BAW50G - 4 2026-06-26
BAW252N - 4 2026-06-25
BAW23T British Airways 4 2026-04-17
BAW176A - 4 2026-06-29
BAW7TG British Airways 3 2026-04-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 BAW178 JFK → LHR Jul 13, 11:55 UTCJul 13, 18:40 UTC6h 45m
2026-07-12 BAW183 - Jul 12, 19:15 UTCJul 13, 02:05 UTC6h 50m
2026-07-12 BAW82 - Jul 12, 10:55 UTCJul 12, 13:15 UTC2h 20m
2026-07-11 BAW83 - Jul 11, 22:10 UTCJul 12, 00:10 UTC2h 0m
2026-07-11 BAW29G BOS → LHR Jul 11, 11:45 UTCJul 11, 17:35 UTC5h 50m
2026-07-10 BAW239 - Jul 10, 19:55 UTCJul 11, 02:45 UTC6h 50m
2026-07-09 BAW82 - Jul 9, 22:10 UTCJul 10, 13:05 UTC14h 55m
2026-07-09 BAW178 JFK → LHR Jul 9, 12:15 UTCJul 9, 18:55 UTC6h 40m
2026-07-08 BAW183 - Jul 8, 19:10 UTCJul 9, 02:20 UTC7h 10m
2026-07-07 BAW82 - Jul 7, 22:05 UTCJul 8, 13:10 UTC15h 5m
2026-07-07 BAW178 JFK → LHR Jul 7, 12:10 UTCJul 7, 18:35 UTC6h 25m
2026-07-06 BAW183 LHR → JFK Jul 6, 18:50 UTCJul 7, 02:00 UTC7h 10m
2026-07-05 BAW82 - Jul 5, 22:15 UTCJul 6, 13:15 UTC15h 0m
2026-07-05 BAW29G BOS → LHR Jul 5, 11:50 UTCJul 5, 17:30 UTC5h 40m
2026-07-04 BAW239 LHR → BOS Jul 4, 19:55 UTCJul 5, 03:00 UTC7h 5m
2026-07-03 BAW180 JFK → LHR Jul 3, 23:40 UTCJul 4, 05:50 UTC6h 10m
2026-07-03 BAW04A - Jul 3, 12:45 UTCJul 3, 20:00 UTC7h 15m
2026-07-02 BAW11J JFK → LHR Jul 2, 23:35 UTCJul 3, 05:50 UTC6h 15m
2026-07-02 BAW181 LHR → EWR Jul 2, 12:10 UTCJul 2, 19:40 UTC7h 30m
2026-07-02 BAW298 - Jul 2, 00:40 UTCJul 2, 07:40 UTC7h 0m
2026-07-01 BAW299 - Jul 1, 12:35 UTCJul 1, 20:50 UTC8h 15m
2026-07-01 BAW298 - Jul 1, 00:35 UTCJul 1, 07:40 UTC7h 5m
2026-06-30 BAW299 - Jun 30, 12:40 UTCJun 30, 20:35 UTC7h 55m
2026-06-30 BAW7NY - Jun 30, 09:45 UTCJun 30, 09:55 UTC10m
2026-06-30 BAW298 - Jun 30, 00:20 UTCJun 30, 07:35 UTC7h 16m
2026-06-29 BAW299 - Jun 29, 12:34 UTCJun 29, 20:19 UTC7h 45m
2026-06-29 BAW176A - Jun 29, 00:24 UTCJun 29, 06:24 UTC6h 0m
2026-06-28 BAW17R LHR → JFK Jun 28, 08:50 UTCJun 28, 15:40 UTC6h 50m
2026-06-27 BAW216 IAD → LHR Jun 27, 22:35 UTCJun 28, 05:04 UTC6h 30m
2026-06-27 BAW7W - Jun 27, 13:00 UTCJun 27, 20:09 UTC7h 10m
2026-06-27 BAW51B BOS → LHR Jun 27, 02:09 UTCJun 27, 08:10 UTC6h 0m
2026-06-26 BAW50G - Jun 26, 17:59 UTCJun 26, 23:49 UTC5h 50m
2026-06-26 BAW50G - Jun 26, 17:25 UTCJun 26, 17:54 UTC30m
2026-06-26 BAW6AC ORD → LHR Jun 26, 04:55 UTCJun 26, 11:55 UTC7h 0m
2026-06-25 BAW7CP LHR → ORD Jun 25, 17:30 UTCJun 26, 02:05 UTC8h 35m
2026-06-25 BAW252N - Jun 25, 05:00 UTCJun 25, 10:04 UTC5h 5m
2026-06-24 BAW53M - Jun 24, 09:45 UTCJun 24, 20:14 UTC10h 30m
2026-06-23 BAW18B LHR → LHR Jun 23, 14:15 UTCJun 24, 05:40 UTC15h 25m
2026-06-23 BAW252N - Jun 23, 08:54 UTCJun 23, 10:15 UTC1h 20m
2026-06-22 - - Jun 22, 17:04 UTCJun 22, 17:15 UTC10m
2026-06-22 BAW53M - Jun 22, 09:54 UTCJun 22, 10:49 UTC55m
2026-06-21 BAW19N LHR → BDA Jun 21, 13:59 UTCJun 22, 05:24 UTC15h 25m
2026-06-20 BAW252N - Jun 20, 20:25 UTCJun 21, 10:09 UTC13h 45m
2026-06-20 BAW53M - Jun 20, 09:54 UTCJun 21, 09:00 UTC23h 5m
2026-06-20 BAW176A JFK → LHR Jun 20, 00:14 UTCJun 20, 06:19 UTC6h 5m
2026-06-19 BAW17R - Jun 19, 07:34 UTCJun 19, 14:44 UTC7h 10m
2026-06-18 BAW178 JFK → LHR Jun 18, 12:15 UTCJun 18, 18:30 UTC6h 15m
2026-06-17 BAW183 - Jun 17, 19:25 UTCJun 18, 02:15 UTC6h 50m
2026-06-17 BAW51B BOS → LHR Jun 17, 02:30 UTCJun 17, 08:25 UTC5h 55m
2026-06-16 BAW50G - Jun 16, 17:10 UTCJun 16, 23:40 UTC6h 31m

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

Mode-S 400774 frequently asked

What is Mode-S code 400774?
400774 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-VIIW.
Where is Mode-S 400774 registered?
Mode-S code 400774 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 400774 broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 400774, octal 20003564, decimal 4,196,212.
What flights does 400774 operate?
Mode-S 400774 has broadcast 20 distinct callsigns, including BAW7CP, BAW6AC, BAW25GP, BAW82, BAW7W.