Apparatus

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sensors Mode-S transponder

4005C1

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-RAES · BOEING 777-200

Hex
4005C1
Octal
20002701
Decimal
4,195,777
Country
GB
Tail
G-RAES
Type
B772
Broadcasting now · callsign BAW12TB · 14,175 ft
Flights observed
192
Distinct callsigns
20
Country
GB
Last broadcast
Jul 26, 19:00 UTC

Current position

4005C1 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4005C1 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
BAW9E British Airways 19 2026-07-21
BAW185 British Airways 16 2026-07-21
BAW183 - 9 2026-07-10
BAW17R British Airways 9 2026-07-19
BAW7W - 8 2026-07-13
BAW7TG - 8 2026-06-19
BAW252N - 8 2026-06-13
BAW216 - 8 2026-07-13
BAW178 - 8 2026-07-08
BAW176A British Airways 8 2026-07-20
BAW23T - 7 2026-06-20
BAW2PD British Airways 6 2026-07-26
BAW53M British Airways 5 2026-06-12
BAW20R British Airways 5 2026-07-25
BAW7NY - 4 2026-07-12
BAW51B - 4 2026-06-30
BAW255T British Airways 4 2026-04-30
BAW21V - 4 2026-07-03
BAW172 - 4 2026-07-13
BAW120 - 4 2026-07-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 BAW2PD LHR → ORD Jul 26, 10:50 UTCJul 26, 18:55 UTC8h 5m
2026-07-25 BAW20R ORD → LHR Jul 25, 22:15 UTCJul 26, 05:30 UTC7h 15m
2026-07-25 BAW2PD LHR → ORD Jul 25, 10:45 UTCJul 25, 18:40 UTC7h 55m
2026-07-24 BAW20R ORD → LHR Jul 24, 22:45 UTCJul 25, 05:40 UTC6h 55m
2026-07-24 BAW2PD LHR → ORD Jul 24, 10:40 UTCJul 24, 18:25 UTC7h 45m
2026-07-23 BAW11J JFK → LHR Jul 23, 23:50 UTCJul 24, 06:05 UTC6h 15m
2026-07-23 BAW181 LHR → EWR Jul 23, 12:10 UTCJul 23, 19:05 UTC6h 55m
2026-07-22 BAW20R ORD → LHR Jul 22, 22:25 UTCJul 23, 05:50 UTC7h 25m
2026-07-22 BAW2PD LHR → ORD Jul 22, 11:25 UTCJul 22, 18:55 UTC7h 30m
2026-07-21 BAW9E EWR → LHR Jul 21, 22:30 UTCJul 22, 04:45 UTC6h 15m
2026-07-21 BAW185 LHR → EWR Jul 21, 10:25 UTCJul 21, 17:35 UTC7h 10m
2026-07-20 BAW20R ORD → LHR Jul 20, 23:10 UTCJul 21, 06:25 UTC7h 15m
2026-07-20 BAW2PD - Jul 20, 10:35 UTCJul 20, 18:25 UTC7h 50m
2026-07-20 BAW176A JFK → LHR Jul 20, 00:15 UTCJul 20, 06:50 UTC6h 35m
2026-07-19 BAW17R LHR → JFK Jul 19, 08:00 UTCJul 19, 15:05 UTC7h 5m
2026-07-14 BAW9E EWR → LHR Jul 14, 22:00 UTCJul 15, 04:35 UTC6h 34m
2026-07-14 BAW185 - Jul 14, 10:40 UTCJul 14, 17:35 UTC6h 55m
2026-07-13 BAW216 IAD → LHR Jul 13, 22:20 UTCJul 14, 05:15 UTC6h 55m
2026-07-13 BAW7W - Jul 13, 12:15 UTCJul 13, 19:35 UTC7h 20m
2026-07-13 BAW172 JFK → LHR Jul 13, 01:10 UTCJul 13, 07:35 UTC6h 25m
2026-07-12 BAW7NY LHR → JFK Jul 12, 09:45 UTCJul 12, 16:25 UTC6h 40m
2026-07-11 BAW9E EWR → LHR Jul 11, 22:10 UTCJul 12, 04:15 UTC6h 5m
2026-07-11 BAW185 LHR → EWR Jul 11, 10:50 UTCJul 11, 18:10 UTC7h 20m
2026-07-10 BAW183 - Jul 10, 19:30 UTCJul 10, 21:20 UTC1h 50m
2026-07-08 BAW82 - Jul 8, 22:10 UTCJul 9, 13:20 UTC15h 10m
2026-07-08 BAW178 JFK → LHR Jul 8, 12:20 UTCJul 8, 18:50 UTC6h 30m
2026-07-07 BAW183 - Jul 7, 18:50 UTCJul 8, 02:00 UTC7h 10m
2026-07-06 BAW9E EWR → LHR Jul 6, 22:40 UTCJul 7, 04:35 UTC5h 55m
2026-07-06 BAW185 - Jul 6, 10:40 UTCJul 6, 17:55 UTC7h 15m
2026-07-06 BAW176A JFK → LHR Jul 6, 00:20 UTCJul 6, 06:40 UTC6h 20m
2026-07-05 BAW17R CTO → JFK Jul 5, 14:55 UTCJul 5, 15:15 UTC20m
2026-07-05 BAW17R - Jul 5, 07:55 UTCJul 5, 14:50 UTC6h 55m
2026-07-04 BAW9E EWR → LHR Jul 4, 22:15 UTCJul 5, 04:40 UTC6h 25m
2026-07-04 BAW185 LHR → EWR Jul 4, 11:40 UTCJul 4, 19:10 UTC7h 30m
2026-07-04 BAW120 - Jul 4, 01:40 UTCJul 4, 08:55 UTC7h 15m
2026-07-03 BAW21V - Jul 3, 15:15 UTCJul 3, 23:15 UTC8h 0m
2026-07-03 BAW298 ORD → LHR Jul 3, 00:50 UTCJul 3, 07:50 UTC7h 0m
2026-07-02 BAW299 - Jul 2, 12:45 UTCJul 2, 21:00 UTC8h 15m
2026-07-02 BAW120 - Jul 2, 01:55 UTCJul 2, 08:55 UTC7h 0m
2026-07-01 BAW21V - Jul 1, 15:20 UTCJul 1, 23:35 UTC8h 15m
2026-07-01 BAW6AC - Jul 1, 02:40 UTCJul 1, 09:45 UTC7h 5m
2026-06-30 BAW7CP LHR → ORD Jun 30, 15:10 UTCJun 30, 23:10 UTC8h 0m
2026-06-30 BAW51B BOS → LHR Jun 30, 02:20 UTCJun 30, 08:10 UTC5h 50m
2026-06-30 BAW51B BOS → BOS Jun 30, 01:50 UTCJun 30, 02:00 UTC10m
2026-06-29 BAW50G - Jun 29, 17:10 UTCJun 29, 23:44 UTC6h 35m
2026-06-29 BAW298 - Jun 29, 01:00 UTCJun 29, 08:04 UTC7h 5m
2026-06-28 BAW299 - Jun 28, 12:55 UTCJun 28, 20:39 UTC7h 45m
2026-06-27 BAW9E EWR → LHR Jun 27, 22:40 UTCJun 28, 04:44 UTC6h 5m
2026-06-27 BAW185 - Jun 27, 11:44 UTCJun 27, 18:49 UTC7h 5m
2026-06-21 BAW6AC - Jun 21, 05:30 UTCJun 21, 12:24 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-RAES page for operator, model, and routing details .

Mode-S 4005C1 frequently asked

What is Mode-S code 4005C1?
4005C1 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-RAES.
Where is Mode-S 4005C1 registered?
Mode-S code 4005C1 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 4005C1 broadcasting right now?
Yes. Mode-S 4005C1 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4005C1, octal 20002701, decimal 4,195,777.
What flights does 4005C1 operate?
Mode-S 4005C1 has broadcast 20 distinct callsigns, including BAW9E, BAW185, BAW183, BAW17R, BAW7W.