Apparatus

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sensors Mode-S transponder

400683

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-VIIK · BOEING 777-200

Hex
400683
Octal
20003203
Decimal
4,195,971
Country
GB
Tail
G-VIIK
Type
B772
Broadcasting now · callsign BAW18B · 24,575 ft
Flights observed
201
Distinct callsigns
20
Country
GB
Last broadcast
Jul 26, 22:45 UTC

Current position

400683 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 400683 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 11 2026-07-26
BAW17R British Airways 10 2026-07-24
BAW7TG - 9 2026-07-16
BAW6AC British Airways 9 2026-07-26
BAW23T British Airways 9 2026-07-17
BAW239 - 9 2026-06-23
BAW176A British Airways 9 2026-07-25
BAW9E British Airways 8 2026-07-23
BAW29G British Airways 8 2026-06-24
BAW255T British Airways 8 2026-05-18
BAW185 British Airways 8 2026-07-23
BAW82 - 7 2026-07-18
BAW25GP British Airways 7 2026-05-19
BAW7W British Airways 6 2026-07-20
BAW252N - 6 2026-07-08
BAW216 British Airways 6 2026-07-20
BAW183 British Airways 6 2026-07-17
BAW178 - 6 2026-07-18
BAW51B British Airways 5 2026-07-20
BAW50G - 5 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 BAW7CP LHR → ORD Jul 26, 15:20 UTCJul 26, 22:45 UTC7h 25m
2026-07-26 BAW6AC ORD → LHR Jul 26, 02:45 UTCJul 26, 09:50 UTC7h 6m
2026-07-25 BAW7CP LHR → ORD Jul 25, 22:30 UTCJul 25, 23:05 UTC35m
2026-07-25 BAW7CP LHR → ORD Jul 25, 15:10 UTCJul 25, 22:25 UTC7h 15m
2026-07-25 BAW176A JFK → LHR Jul 25, 01:20 UTCJul 25, 07:40 UTC6h 20m
2026-07-24 BAW17R LHR → JFK Jul 24, 07:55 UTCJul 24, 14:40 UTC6h 45m
2026-07-23 BAW9E EWR → LHR Jul 23, 22:05 UTCJul 24, 04:05 UTC6h 0m
2026-07-23 BAW185 LHR → EWR Jul 23, 10:35 UTCJul 23, 17:45 UTC7h 10m
2026-07-22 BAW9E EWR → LHR Jul 22, 22:45 UTCJul 23, 04:50 UTC6h 5m
2026-07-21 BAW185 LHR → EWR Jul 21, 23:25 UTCJul 22, 18:00 UTC18h 35m
2026-07-21 BAW2PD LHR → ORD Jul 21, 10:55 UTCJul 21, 18:55 UTC8h 0m
2026-07-20 BAW216 IAD → LHR Jul 20, 22:30 UTCJul 21, 05:15 UTC6h 45m
2026-07-20 BAW7W LHR → IAD Jul 20, 12:00 UTCJul 20, 19:10 UTC7h 10m
2026-07-20 BAW51B BOS → LHR Jul 20, 03:05 UTCJul 20, 09:10 UTC6h 5m
2026-07-19 BAW50G - Jul 19, 17:50 UTCJul 20, 00:25 UTC6h 35m
2026-07-18 BAW82 - Jul 18, 22:00 UTCJul 19, 14:20 UTC16h 20m
2026-07-18 BAW178 - Jul 18, 12:15 UTCJul 18, 18:40 UTC6h 25m
2026-07-17 BAW183 LHR → JFK Jul 17, 19:25 UTCJul 18, 02:14 UTC6h 50m
2026-07-17 BAW23T ATL → LHR Jul 17, 04:25 UTCJul 17, 12:10 UTC7h 45m
2026-07-16 BAW7TG - Jul 16, 17:49 UTCJul 17, 01:49 UTC8h 0m
2026-07-16 BAW22E BNA → LHR Jul 16, 02:10 UTCJul 16, 09:55 UTC7h 45m
2026-07-15 BAW223N - Jul 15, 15:20 UTCJul 15, 23:30 UTC8h 10m
2026-07-15 BAW6AC ORD → LHR Jul 15, 02:30 UTCJul 15, 10:00 UTC7h 30m
2026-07-14 BAW7CP - Jul 14, 14:55 UTCJul 14, 22:40 UTC7h 45m
2026-07-14 BAW6AC - Jul 14, 03:00 UTCJul 14, 10:40 UTC7h 40m
2026-07-13 BAW7CP - Jul 13, 15:55 UTCJul 13, 23:35 UTC7h 40m
2026-07-13 BAW6AC - Jul 13, 04:25 UTCJul 13, 11:55 UTC7h 30m
2026-07-12 BAW7CP LHR → ORD Jul 12, 16:15 UTCJul 13, 00:10 UTC7h 55m
2026-07-12 BAW6AC ORD → LHR Jul 12, 03:35 UTCJul 12, 10:55 UTC7h 20m
2026-07-11 BAW7CP - Jul 11, 15:15 UTCJul 11, 23:15 UTC8h 0m
2026-07-11 BAW6AC ORD → LHR Jul 11, 04:10 UTCJul 11, 11:05 UTC6h 55m
2026-07-10 BAW7CP LHR → ORD Jul 10, 15:20 UTCJul 10, 23:15 UTC7h 55m
2026-07-10 BAW6AC - Jul 10, 04:15 UTCJul 10, 11:05 UTC6h 50m
2026-07-09 BAW7CP LHR → ORD Jul 9, 15:20 UTCJul 9, 23:30 UTC8h 10m
2026-07-09 BAW22E BNA → LHR Jul 9, 02:20 UTCJul 9, 10:00 UTC7h 40m
2026-07-08 BAW223N LHR → BNA Jul 8, 14:40 UTCJul 8, 22:55 UTC8h 15m
2026-07-08 BAW252N - Jul 8, 09:00 UTCJul 8, 10:30 UTC1h 30m
2026-07-07 BAW53M - Jul 7, 09:35 UTCJul 7, 10:30 UTC55m
2026-07-06 BAW180 JFK → LHR Jul 6, 23:50 UTCJul 7, 06:05 UTC6h 15m
2026-07-06 BAW04A - Jul 6, 12:45 UTCJul 6, 20:10 UTC7h 25m
2026-07-06 BAW22E BNA → LHR Jul 6, 02:00 UTCJul 6, 09:30 UTC7h 30m
2026-07-05 BAW223N LHR → BNA Jul 5, 14:45 UTCJul 5, 23:10 UTC8h 25m
2026-07-05 BAW172 JFK → LHR Jul 5, 02:30 UTCJul 5, 08:50 UTC6h 20m
2026-07-04 BAW7NY - Jul 4, 10:10 UTCJul 4, 17:35 UTC7h 25m
2026-07-04 BAW176A JFK → LHR Jul 4, 00:15 UTCJul 4, 06:25 UTC6h 10m
2026-07-03 BAW17R - Jul 3, 07:40 UTCJul 3, 14:45 UTC7h 5m
2026-07-02 BAW178 JFK → LHR Jul 2, 12:15 UTCJul 2, 18:30 UTC6h 15m
2026-07-01 BAW183 - Jul 1, 18:50 UTCJul 2, 02:00 UTC7h 10m
2026-06-30 BAW82 - Jun 30, 22:10 UTCJul 1, 13:05 UTC14h 55m
2026-06-30 BAW178 JFK → LHR Jun 30, 12:15 UTCJun 30, 18:25 UTC6h 10m

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

Mode-S 400683 frequently asked

What is Mode-S code 400683?
400683 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-VIIK.
Where is Mode-S 400683 registered?
Mode-S code 400683 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 400683 broadcasting right now?
Yes. Mode-S 400683 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 400683, octal 20003203, decimal 4,195,971.
What flights does 400683 operate?
Mode-S 400683 has broadcast 20 distinct callsigns, including BAW7CP, BAW17R, BAW7TG, BAW6AC, BAW23T.