Apparatus

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sensors Mode-S transponder

4007F6

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-YMMK · BOEING 777-200

Hex
4007F6
Octal
20003766
Decimal
4,196,342
Country
GB
Tail
G-YMMK
Type
B772
Broadcasting now · callsign BAW264 · 37,000 ft
Flights observed
111
Distinct callsigns
20
Country
GB
Last broadcast
9m ago

Current position

4007F6 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4007F6 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
BAW249 British Airways 16 2026-05-26
BAW248 British Airways 16 2026-05-26
BAW134 British Airways 12 2026-05-22
BAW118 British Airways 10 2026-05-25
BAW119 British Airways 8 2026-05-24
BAW135 British Airways 6 2026-05-21
BAW88C British Airways 4 2026-05-21
BAW5VY British Airways 4 2026-05-20
BAW265 British Airways 4 2026-05-29
BAW264 British Airways 4 2026-05-30
BAW143 British Airways 4 2026-05-18
BAW142 British Airways 4 2026-05-18
BAW51B British Airways 3 2026-04-13
BAW257 British Airways 3 2026-04-30
BAW256 British Airways 2 2026-05-01
BAW199 British Airways 2 2026-05-02
BAW50G - 1 2026-04-12
BAW46EZ British Airways 1 2026-04-27
BAW461 British Airways 1 2026-04-27
BAW2LJ British Airways 1 2026-05-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 BAW264 IAD → LHR May 30, 00:00 UTCMay 30, 01:30 UTC1h 30m
2026-05-29 BAW265 LHR → SAN May 29, 11:20 UTCMay 29, 21:50 UTC10h 30m
2026-05-27 BAW264 IAD → LHR May 27, 23:55 UTCMay 28, 10:20 UTC10h 25m
2026-05-27 BAW265 LHR → SAN May 27, 10:55 UTCMay 27, 21:40 UTC10h 45m
2026-05-26 BAW248 GIG → LHR May 26, 20:05 UTCMay 27, 06:34 UTC10h 30m
2026-05-26 BAW248 GIG → LHR May 26, 15:35 UTCMay 26, 17:59 UTC2h 25m
2026-05-26 BAW249 LHR → GIG May 26, 10:34 UTCMay 26, 13:29 UTC2h 55m
2026-05-25 BAW249 LHR → GIG May 25, 21:09 UTCMay 26, 08:24 UTC11h 15m
2026-05-25 BAW118 BLR → LHR May 25, 05:00 UTCMay 25, 15:05 UTC10h 5m
2026-05-24 BAW119 LHR → BLR May 24, 17:20 UTCMay 25, 02:50 UTC9h 30m
2026-05-22 BAW134 BOM → LHR May 22, 06:20 UTCMay 22, 13:50 UTC7h 30m
2026-05-21 BAW135 LHR → BOM May 21, 17:00 UTCMay 22, 01:50 UTC8h 50m
2026-05-21 BAW88C YVR → LHR May 21, 04:15 UTCMay 21, 13:15 UTC9h 0m
2026-05-20 BAW5VY LHR → YVR May 20, 16:50 UTCMay 21, 01:50 UTC9h 0m
2026-05-20 BAW264 IAD → LHR May 20, 00:20 UTCMay 20, 09:50 UTC9h 31m
2026-05-19 BAW265 LHR → SAN May 19, 11:10 UTCMay 19, 21:50 UTC10h 40m
2026-05-18 BAW142 DEL → LHR May 18, 20:55 UTCMay 19, 05:35 UTC8h 40m
2026-05-18 BAW143 LHR → DEL May 18, 09:50 UTCMay 18, 17:50 UTC8h 0m
2026-05-17 BAW142 DEL → LHR May 17, 21:20 UTCMay 18, 05:55 UTC8h 35m
2026-05-17 BAW143 LHR → DEL May 17, 09:50 UTCMay 17, 17:55 UTC8h 5m
2026-05-16 BAW248 GIG → LHR May 16, 20:15 UTCMay 17, 06:35 UTC10h 20m
2026-05-16 BAW248 GIG → LHR May 16, 15:40 UTCMay 16, 18:05 UTC2h 25m
2026-05-16 BAW249 LHR → GIG May 16, 10:35 UTCMay 16, 13:31 UTC2h 55m
2026-05-15 BAW249 LHR → GIG May 15, 21:45 UTCMay 16, 08:41 UTC10h 56m
2026-05-15 BAW118 BLR → LHR May 15, 03:00 UTCMay 15, 12:00 UTC9h 0m
2026-05-15 BAW118 BLR → LHR May 15, 01:45 UTCMay 15, 01:55 UTC10m
2026-05-14 BAW119 LHR → BLR May 14, 14:01 UTCMay 14, 23:30 UTC9h 30m
2026-05-13 BAW248 GIG → LHR May 13, 20:35 UTCMay 14, 07:05 UTC10h 30m
2026-05-13 BAW248 GIG → LHR May 13, 15:45 UTCMay 13, 18:10 UTC2h 25m
2026-05-13 BAW249 LHR → GIG May 13, 10:40 UTCMay 13, 13:45 UTC3h 5m
2026-05-12 BAW249 LHR → GIG May 12, 21:20 UTCMay 13, 08:35 UTC11h 15m
2026-05-11 BAW134 BOM → LHR May 11, 19:35 UTCMay 12, 14:05 UTC18h 30m
2026-05-11 BAW134 BOM → LHR May 11, 17:35 UTCMay 12, 14:05 UTC20h 30m
2026-05-11 BAW134 BOM → LHR May 11, 17:20 UTCMay 12, 14:05 UTC20h 45m
2026-05-10 BAW248 GIG → LHR May 10, 20:05 UTCMay 11, 06:30 UTC10h 25m
2026-05-10 BAW248 GIG → LHR May 10, 15:29 UTCMay 10, 17:59 UTC2h 30m
2026-05-10 BAW249 LHR → GIG May 10, 10:49 UTCMay 10, 13:40 UTC2h 50m
2026-05-09 BAW249 LHR → GIG May 9, 21:00 UTCMay 10, 08:20 UTC11h 20m
2026-05-09 BAW118 BLR → LHR May 9, 07:10 UTCMay 9, 12:05 UTC4h 55m
2026-05-09 BAW118 BLR → LHR May 9, 01:45 UTCMay 9, 02:00 UTC15m
2026-05-08 BAW119 LHR → BLR May 8, 13:25 UTCMay 8, 22:40 UTC9h 15m
2026-05-08 BAW2LJ BWI → LHR May 8, 02:09 UTCMay 8, 08:34 UTC6h 25m
2026-05-07 BAW22B LHR → BWI May 7, 16:20 UTCMay 7, 23:59 UTC7h 39m
2026-05-07 BAW118 BLR → LHR May 7, 07:10 UTCMay 7, 12:10 UTC5h 0m
2026-05-07 BAW118 BLR → LHR May 7, 01:40 UTCMay 7, 01:55 UTC15m
2026-05-06 BAW119 LHR → BLR May 6, 13:50 UTCMay 6, 23:05 UTC9h 14m
2026-05-05 BAW248 GIG → LHR May 5, 20:45 UTCMay 6, 07:15 UTC10h 30m
2026-05-05 BAW248 GIG → LHR May 5, 16:30 UTCMay 5, 18:50 UTC2h 20m
2026-05-05 BAW249 LHR → GIG May 5, 10:25 UTCMay 5, 13:25 UTC3h 0m
2026-05-04 BAW249 LHR → GIG May 4, 21:10 UTCMay 5, 08:35 UTC11h 25m

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

Mode-S 4007F6 frequently asked

What is Mode-S code 4007F6?
4007F6 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-YMMK.
Where is Mode-S 4007F6 registered?
Mode-S code 4007F6 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 4007F6 broadcasting right now?
Yes. Mode-S 4007F6 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4007F6, octal 20003766, decimal 4,196,342.
What flights does 4007F6 operate?
Mode-S 4007F6 has broadcast 20 distinct callsigns, including BAW249, BAW248, BAW134, BAW118, BAW119.