Apparatus

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sensors Mode-S transponder

4005BC

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-VIID · BOEING 777-200

Hex
4005BC
Octal
20002674
Decimal
4,195,772
Country
GB
Tail
G-VIID
Type
B772
No current signal · last broadcast 1d ago
Flights observed
187
Distinct callsigns
20
Country
GB
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 4005BC.

Country allocation

The ICAO 24-bit address 4005BC 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
BAW53M - 20 2026-07-10
BAW252N - 20 2026-07-11
BAW19N British Airways 15 2026-06-14
BAW18B - 15 2026-06-20
BAW7TG - 11 2026-06-22
BAW25GP - 11 2026-07-10
BAW23T - 9 2026-06-23
BAW120 British Airways 6 2026-05-26
BAW7CP British Airways 5 2026-06-29
BAW6AC - 5 2026-06-30
BAW216 - 5 2026-07-06
BAW7W - 4 2026-07-05
BAW46EZ British Airways 4 2026-04-15
BAW255T - 4 2026-07-09
BAW17R - 4 2026-07-02
BAW176A British Airways 4 2026-05-04
BAW9E - 3 2026-07-01
BAW461 - 3 2026-04-15
BAW299 - 3 2026-07-06
BAW298 - 3 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-12 BAW29G BOS → LHR Jul 12, 12:30 UTCJul 12, 18:30 UTC6h 0m
2026-07-11 BAW239 - Jul 11, 19:45 UTCJul 12, 02:25 UTC6h 40m
2026-07-11 BAW252N - Jul 11, 09:00 UTCJul 11, 10:15 UTC1h 15m
2026-07-10 BAW252N - Jul 10, 11:05 UTCJul 11, 10:15 UTC23h 10m
2026-07-10 BAW53M - Jul 10, 09:50 UTCJul 11, 09:00 UTC23h 10m
2026-07-10 BAW25GP - Jul 10, 01:40 UTCJul 10, 04:25 UTC2h 45m
2026-07-09 BAW255T - Jul 9, 18:15 UTCJul 9, 18:30 UTC15m
2026-07-09 BAW255T - Jul 9, 10:25 UTCJul 9, 11:30 UTC1h 5m
2026-07-08 BAW29G BOS → LHR Jul 8, 11:50 UTCJul 8, 17:55 UTC6h 5m
2026-07-07 BAW239 - Jul 7, 19:35 UTCJul 8, 02:00 UTC6h 25m
2026-07-07 BAW298 - Jul 7, 00:30 UTCJul 7, 07:50 UTC7h 20m
2026-07-06 BAW299 - Jul 6, 12:50 UTCJul 6, 20:50 UTC8h 0m
2026-07-06 BAW216 IAD → LHR Jul 6, 00:45 UTCJul 6, 07:05 UTC6h 20m
2026-07-05 BAW7W - Jul 5, 12:10 UTCJul 5, 19:50 UTC7h 40m
2026-07-04 BAW178 JFK → LHR Jul 4, 12:40 UTCJul 4, 18:40 UTC6h 0m
2026-07-02 BAW17R - Jul 2, 07:45 UTCJul 2, 15:00 UTC7h 15m
2026-07-01 BAW9E - Jul 1, 22:10 UTCJul 2, 04:15 UTC6h 5m
2026-07-01 BAW185 - Jul 1, 10:25 UTCJul 1, 17:55 UTC7h 30m
2026-06-30 BAW6AC ORD → LHR Jun 30, 03:20 UTCJun 30, 10:35 UTC7h 15m
2026-06-29 BAW7CP LHR → ORD Jun 29, 15:09 UTCJun 29, 22:59 UTC7h 50m
2026-06-29 BAW6AC ORD → LHR Jun 29, 02:59 UTCJun 29, 10:04 UTC7h 5m
2026-06-28 BAW7CP LHR → ORD Jun 28, 15:05 UTCJun 28, 22:55 UTC7h 50m
2026-06-28 BAW298 - Jun 28, 02:44 UTCJun 28, 09:45 UTC7h 0m
2026-06-27 BAW299 - Jun 27, 15:39 UTCJun 27, 23:19 UTC7h 40m
2026-06-27 BAW298 - Jun 27, 00:39 UTCJun 27, 07:59 UTC7h 20m
2026-06-26 BAW299 - Jun 26, 12:55 UTCJun 26, 20:50 UTC7h 55m
2026-06-26 BAW98T - Jun 26, 03:45 UTCJun 26, 09:55 UTC6h 10m
2026-06-25 BAW99 LHR → YYZ Jun 25, 18:00 UTCJun 26, 01:05 UTC7h 5m
2026-06-25 BAW6AC ORD → LHR Jun 25, 04:35 UTCJun 25, 11:25 UTC6h 50m
2026-06-24 BAW7CP LHR → ORD Jun 24, 15:09 UTCJun 24, 23:10 UTC8h 0m
2026-06-24 BAW6AC - Jun 24, 02:45 UTCJun 24, 09:45 UTC7h 0m
2026-06-23 BAW7CP LHR → ORD Jun 23, 15:15 UTCJun 23, 23:05 UTC7h 50m
2026-06-23 BAW23T - Jun 23, 09:09 UTCJun 23, 10:29 UTC1h 20m
2026-06-23 BAW23T - Jun 23, 03:04 UTCJun 23, 05:39 UTC2h 35m
2026-06-22 BAW7TG - Jun 22, 15:29 UTCJun 23, 00:09 UTC8h 40m
2026-06-22 BAW252N - Jun 22, 08:54 UTCJun 22, 10:05 UTC1h 10m
2026-06-21 BAW53M - Jun 21, 09:35 UTCJun 21, 10:40 UTC1h 5m
2026-06-20 BAW18B - Jun 20, 13:49 UTCJun 21, 05:49 UTC16h 0m
2026-06-20 BAW6AC - Jun 20, 02:54 UTCJun 20, 09:49 UTC6h 55m
2026-06-19 BAW7CP LHR → ORD Jun 19, 14:49 UTCJun 19, 22:39 UTC7h 50m
2026-06-19 BAW2LJ - Jun 19, 01:59 UTCJun 19, 08:34 UTC6h 35m
2026-06-18 BAW22B - Jun 18, 16:00 UTCJun 18, 23:35 UTC7h 35m
2026-06-18 BAW29C IAD → LHR Jun 18, 02:55 UTCJun 18, 09:30 UTC6h 35m
2026-06-17 BAW293 - Jun 17, 16:30 UTCJun 17, 23:50 UTC7h 20m
2026-06-17 BAW23T ATL → LHR Jun 17, 02:55 UTCJun 17, 10:20 UTC7h 25m
2026-06-16 BAW7TG - Jun 16, 16:10 UTCJun 17, 00:35 UTC8h 26m
2026-06-16 BAW252N - Jun 16, 08:55 UTCJun 16, 10:00 UTC1h 5m
2026-06-15 BAW252N - Jun 15, 11:05 UTCJun 16, 10:00 UTC22h 55m
2026-06-15 BAW53M LHR → NAS Jun 15, 09:49 UTCJun 16, 09:00 UTC23h 10m
2026-06-15 BAW18B - Jun 15, 04:15 UTCJun 15, 05:25 UTC1h 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-VIID page for operator, model, and routing details .

Mode-S 4005BC frequently asked

What is Mode-S code 4005BC?
4005BC is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-VIID.
Where is Mode-S 4005BC registered?
Mode-S code 4005BC 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 4005BC broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4005BC, octal 20002674, decimal 4,195,772.
What flights does 4005BC operate?
Mode-S 4005BC has broadcast 20 distinct callsigns, including BAW53M, BAW252N, BAW19N, BAW18B, BAW7TG.