Apparatus

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sensors Mode-S transponder

4006C4

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-VIIS · BOEING 777-200

Hex
4006C4
Octal
20003304
Decimal
4,196,036
Country
GB
Tail
G-VIIS
Type
B772
No current signal · last broadcast 8h ago
Flights observed
189
Distinct callsigns
20
Country
GB
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S 4006C4.

Country allocation

The ICAO 24-bit address 4006C4 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
BAW19N - 9 2026-07-14
BAW7W - 8 2026-06-25
BAW53M - 8 2026-07-12
BAW29G British Airways 8 2026-05-21
BAW252N - 8 2026-07-13
BAW216 British Airways 8 2026-06-08
BAW17R - 8 2026-07-01
BAW291 - 7 2026-06-19
BAW290 - 7 2026-06-19
BAW239 British Airways 7 2026-05-20
BAW18B - 7 2026-07-10
BAW176A - 7 2026-07-02
BAW9E - 6 2026-07-03
BAW7NY - 6 2026-06-28
BAW185 - 6 2026-07-03
BAW172 - 6 2026-06-29
BAW82 British Airways 4 2026-06-04
BAW255T - 4 2026-07-11
BAW181 British Airways 4 2026-06-13
BAW11J - 4 2026-06-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 BAW19N - Jul 14, 13:55 UTCJul 14, 15:05 UTC1h 10m
2026-07-14 BAW22E BNA → LHR Jul 14, 02:40 UTCJul 14, 10:40 UTC8h 0m
2026-07-13 BAW223N LHR → BNA Jul 13, 16:20 UTCJul 14, 00:25 UTC8h 5m
2026-07-13 BAW252N - Jul 13, 09:00 UTCJul 13, 10:15 UTC1h 15m
2026-07-12 BAW53M - Jul 12, 09:55 UTCJul 13, 09:00 UTC23h 5m
2026-07-12 BAW25GP - Jul 12, 03:55 UTCJul 12, 05:10 UTC1h 15m
2026-07-11 BAW255T - Jul 11, 18:45 UTCJul 11, 19:00 UTC15m
2026-07-11 BAW255T - Jul 11, 11:00 UTCJul 11, 11:55 UTC55m
2026-07-10 BAW18B LHR → LHR Jul 10, 13:50 UTCJul 11, 05:31 UTC15h 41m
2026-07-10 BAW252N - Jul 10, 02:40 UTCJul 10, 10:25 UTC7h 45m
2026-07-09 BAW53M - Jul 9, 09:40 UTCJul 10, 02:45 UTC17h 5m
2026-07-09 BAW25GP - Jul 9, 03:30 UTCJul 9, 05:05 UTC1h 35m
2026-07-08 BAW255T - Jul 8, 18:30 UTCJul 8, 18:40 UTC10m
2026-07-08 BAW255T - Jul 8, 10:45 UTCJul 8, 11:35 UTC50m
2026-07-07 BAW252N - Jul 7, 09:15 UTCJul 7, 10:25 UTC1h 10m
2026-07-06 BAW53M - Jul 6, 09:35 UTCJul 6, 10:45 UTC1h 10m
2026-07-05 BAW18B - Jul 5, 14:05 UTCJul 6, 05:30 UTC15h 25m
2026-07-03 BAW9E - Jul 3, 22:30 UTCJul 4, 04:35 UTC6h 5m
2026-07-03 BAW185 - Jul 3, 10:45 UTCJul 3, 18:00 UTC7h 15m
2026-07-02 BAW9E EWR → LHR Jul 2, 22:50 UTCJul 3, 05:00 UTC6h 10m
2026-07-02 BAW185 - Jul 2, 12:25 UTCJul 2, 19:55 UTC7h 30m
2026-07-02 BAW176A JFK → LHR Jul 2, 00:30 UTCJul 2, 06:30 UTC6h 0m
2026-07-01 BAW17R LHR → JFK Jul 1, 07:40 UTCJul 1, 14:45 UTC7h 5m
2026-06-30 BAW9E - Jun 30, 22:10 UTCJul 1, 04:20 UTC6h 10m
2026-06-30 BAW185 - Jun 30, 10:45 UTCJun 30, 17:40 UTC6h 55m
2026-06-30 BAW180 JFK → LHR Jun 30, 00:14 UTCJun 30, 06:20 UTC6h 5m
2026-06-29 BAW04A - Jun 29, 13:00 UTCJun 29, 20:09 UTC7h 10m
2026-06-29 BAW172 - Jun 29, 01:44 UTCJun 29, 07:40 UTC5h 55m
2026-06-28 BAW7NY - Jun 28, 10:39 UTCJun 28, 17:39 UTC7h 0m
2026-06-27 BAW9603 IAD → LHR Jun 27, 14:25 UTCJun 27, 20:44 UTC6h 20m
2026-06-25 BAW7W - Jun 25, 19:59 UTCJun 25, 20:39 UTC40m
2026-06-25 BAW7W - Jun 25, 13:05 UTCJun 25, 19:54 UTC6h 50m
2026-06-25 BAW298 - Jun 25, 03:10 UTCJun 25, 10:09 UTC7h 0m
2026-06-24 BAW299 - Jun 24, 13:34 UTCJun 24, 21:24 UTC7h 50m
2026-06-24 BAW172 JFK → LHR Jun 24, 01:30 UTCJun 24, 07:40 UTC6h 10m
2026-06-23 BAW7NY - Jun 23, 09:34 UTCJun 23, 16:39 UTC7h 5m
2026-06-23 BAW176A JFK → LHR Jun 23, 00:15 UTCJun 23, 06:24 UTC6h 10m
2026-06-22 BAW17R - Jun 22, 13:14 UTCJun 22, 14:40 UTC1h 25m
2026-06-22 BAW17R - Jun 22, 07:40 UTCJun 22, 13:10 UTC5h 30m
2026-06-21 BAW178 - Jun 21, 12:10 UTCJun 21, 16:59 UTC4h 50m
2026-06-20 BAW183 - Jun 20, 18:54 UTCJun 21, 01:59 UTC7h 5m
2026-06-19 BAW290 IAD → LHR Jun 19, 23:54 UTCJun 20, 06:14 UTC6h 20m
2026-06-19 BAW291 - Jun 19, 13:34 UTCJun 19, 21:09 UTC7h 35m
2026-06-19 BAW6AC - Jun 19, 02:45 UTCJun 19, 09:59 UTC7h 15m
2026-06-18 BAW7CP LHR → ORD Jun 18, 15:05 UTCJun 18, 22:55 UTC7h 50m
2026-06-17 BAW19N LHR → BDA Jun 17, 13:50 UTCJun 18, 05:20 UTC15h 30m
2026-06-17 BAW252N - Jun 17, 09:00 UTCJun 17, 10:10 UTC1h 10m
2026-06-16 BAW53M - Jun 16, 09:50 UTCJun 16, 11:10 UTC1h 20m
2026-06-15 BAW19N LHR → BDA Jun 15, 14:24 UTCJun 16, 05:45 UTC15h 20m
2026-06-15 BAW252N - Jun 15, 09:05 UTCJun 15, 10:20 UTC1h 15m

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

Mode-S 4006C4 frequently asked

What is Mode-S code 4006C4?
4006C4 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-VIIS.
Where is Mode-S 4006C4 registered?
Mode-S code 4006C4 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 4006C4 broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4006C4, octal 20003304, decimal 4,196,036.
What flights does 4006C4 operate?
Mode-S 4006C4 has broadcast 20 distinct callsigns, including BAW19N, BAW7W, BAW53M, BAW29G, BAW252N.