Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

400684

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-VIIL · BOEING 777-200

Hex
400684
Octal
20003204
Decimal
4,195,972
Country
GB
Tail
G-VIIL
Type
B772
No current signal · last broadcast 2h ago
Flights observed
173
Distinct callsigns
20
Country
GB
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 400684.

Country allocation

The ICAO 24-bit address 400684 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
BAW7NY - 10 2026-07-07
BAW183 - 9 2026-06-15
BAW178 British Airways 9 2026-06-16
BAW7CP - 8 2026-07-08
BAW6AC - 7 2026-07-09
BAW252N British Airways 7 2026-05-11
BAW176A - 7 2026-07-14
BAW82 - 6 2026-06-14
BAW172 - 6 2026-07-08
BAW53M British Airways 5 2026-05-10
BAW11J - 5 2026-06-18
BAW9E - 4 2026-06-29
BAW29G British Airways 4 2026-06-20
BAW239 - 4 2026-06-19
BAW19N British Airways 4 2026-05-11
BAW18B British Airways 4 2026-05-12
BAW185 - 4 2026-06-29
BAW181 British Airways 4 2026-06-10
BAW180 British Airways 4 2026-04-18
BAW17R - 4 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 BAW255T - Jul 14, 11:05 UTCJul 14, 12:15 UTC1h 10m
2026-07-14 BAW176A - Jul 14, 00:10 UTCJul 14, 06:40 UTC6h 30m
2026-07-13 BAW17R - Jul 13, 07:45 UTCJul 13, 14:25 UTC6h 40m
2026-07-12 BAW120 - Jul 12, 01:45 UTCJul 12, 09:00 UTC7h 15m
2026-07-11 BAW21V - Jul 11, 15:10 UTCJul 11, 23:05 UTC7h 55m
2026-07-11 BAW22E BNA → LHR Jul 11, 01:50 UTCJul 11, 09:25 UTC7h 35m
2026-07-10 BAW223N LHR → BNA Jul 10, 14:45 UTCJul 10, 23:20 UTC8h 35m
2026-07-10 BAW22E - Jul 10, 02:05 UTCJul 10, 09:35 UTC7h 30m
2026-07-09 BAW223N - Jul 9, 14:50 UTCJul 9, 23:20 UTC8h 30m
2026-07-09 BAW6AC - Jul 9, 03:45 UTCJul 9, 11:05 UTC7h 20m
2026-07-08 BAW7CP - Jul 8, 15:15 UTCJul 8, 23:25 UTC8h 10m
2026-07-08 BAW172 JFK → LHR Jul 8, 01:25 UTCJul 8, 08:00 UTC6h 35m
2026-07-07 BAW7NY LHR → JFK Jul 7, 09:35 UTCJul 7, 16:35 UTC7h 0m
2026-07-06 BAW216 IAD → LHR Jul 6, 22:55 UTCJul 7, 05:25 UTC6h 30m
2026-07-06 BAW7W - Jul 6, 12:30 UTCJul 6, 20:05 UTC7h 35m
2026-07-06 BAW120 - Jul 6, 01:50 UTCJul 6, 09:00 UTC7h 10m
2026-07-05 BAW21V - Jul 5, 15:25 UTCJul 5, 23:20 UTC7h 55m
2026-07-05 BAW6AC ORD → LHR Jul 5, 04:10 UTCJul 5, 11:00 UTC6h 50m
2026-07-04 BAW7CP LHR → ORD Jul 4, 16:30 UTCJul 5, 00:55 UTC8h 25m
2026-07-04 BAW298 ORD → LHR Jul 4, 06:00 UTCJul 4, 13:05 UTC7h 5m
2026-07-02 BAW7CP LHR → ORD Jul 2, 14:50 UTCJul 2, 23:05 UTC8h 15m
2026-07-02 BAW172 JFK → LHR Jul 2, 01:40 UTCJul 2, 07:50 UTC6h 10m
2026-07-01 BAW7NY - Jul 1, 09:35 UTCJul 1, 16:40 UTC7h 5m
2026-07-01 BAW176A - Jul 1, 00:05 UTCJul 1, 06:15 UTC6h 10m
2026-06-30 BAW17R - Jun 30, 07:50 UTCJun 30, 14:40 UTC6h 50m
2026-06-29 BAW9E - Jun 29, 22:15 UTCJun 30, 04:20 UTC6h 6m
2026-06-29 BAW185 - Jun 29, 10:40 UTCJun 29, 17:49 UTC7h 10m
2026-06-28 BAW290 IAD → LHR Jun 28, 23:39 UTCJun 29, 06:09 UTC6h 30m
2026-06-28 BAW291 - Jun 28, 13:34 UTCJun 28, 20:59 UTC7h 25m
2026-06-28 BAW6AC ORD → LHR Jun 28, 03:59 UTCJun 28, 10:55 UTC6h 55m
2026-06-27 BAW7CP LHR → ORD Jun 27, 16:24 UTCJun 28, 00:15 UTC7h 50m
2026-06-27 BAW6AC - Jun 27, 03:25 UTCJun 27, 10:34 UTC7h 10m
2026-06-26 BAW7CP LHR → ORD Jun 26, 15:05 UTCJun 26, 22:55 UTC7h 50m
2026-06-26 BAW298 ORD → LHR Jun 26, 01:10 UTCJun 26, 08:15 UTC7h 5m
2026-06-25 BAW299 - Jun 25, 13:29 UTCJun 25, 21:20 UTC7h 50m
2026-06-25 BAW51B BOS → LHR Jun 25, 04:04 UTCJun 25, 09:50 UTC5h 45m
2026-06-24 BAW50G - Jun 24, 17:29 UTCJun 25, 00:14 UTC6h 45m
2026-06-24 BAW120 CVG → LHR Jun 24, 03:10 UTCJun 24, 10:10 UTC7h 0m
2026-06-23 BAW21V - Jun 23, 16:29 UTCJun 24, 00:30 UTC8h 0m
2026-06-23 BAW6AC ORD → LHR Jun 23, 03:09 UTCJun 23, 10:15 UTC7h 5m
2026-06-22 BAW7CP LHR → ORD Jun 22, 14:45 UTCJun 22, 22:44 UTC8h 0m
2026-06-22 BAW18A JFK → LHR Jun 22, 04:44 UTCJun 22, 10:49 UTC6h 5m
2026-06-21 BAW37J LHR → JFK Jun 21, 17:20 UTCJun 22, 00:14 UTC6h 55m
2026-06-20 BAW83 - Jun 20, 21:49 UTCJun 21, 13:04 UTC15h 15m
2026-06-20 BAW29G BOS → LHR Jun 20, 11:59 UTCJun 20, 17:44 UTC5h 45m
2026-06-19 BAW239 - Jun 19, 21:04 UTCJun 20, 03:39 UTC6h 35m
2026-06-18 BAW11J JFK → LHR Jun 18, 23:30 UTCJun 19, 05:40 UTC6h 9m
2026-06-18 BAW7NY - Jun 18, 10:00 UTCJun 18, 16:50 UTC6h 50m
2026-06-18 BAW176A JFK → LHR Jun 18, 00:45 UTCJun 18, 06:55 UTC6h 10m
2026-06-17 BAW17R - Jun 17, 09:00 UTCJun 17, 15:55 UTC6h 55m

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

Mode-S 400684 frequently asked

What is Mode-S code 400684?
400684 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-VIIL.
Where is Mode-S 400684 registered?
Mode-S code 400684 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 400684 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 400684, octal 20003204, decimal 4,195,972.
What flights does 400684 operate?
Mode-S 400684 has broadcast 20 distinct callsigns, including BAW7NY, BAW183, BAW178, BAW7CP, BAW6AC.