Apparatus

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sensors Mode-S transponder

4007EF

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-YMMD · BOEING 777-200

Hex
4007EF
Octal
20003757
Decimal
4,196,335
Country
GB
Tail
G-YMMD
Type
B772
No current signal · last broadcast Jul 26, 21:45 UTC
Flights observed
157
Distinct callsigns
20
Country
GB
Last broadcast
Jul 26, 21:45 UTC

Last known position

Most recent position reported by Mode-S 4007EF.

Country allocation

The ICAO 24-bit address 4007EF 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
BAW2203 British Airways 17 2026-07-26
BAW2202 British Airways 16 2026-07-20
BAW5KW British Airways 11 2026-07-26
BAW9VA British Airways 10 2026-07-25
BAW2064 British Airways 10 2026-07-24
BAW63H British Airways 7 2026-07-17
BAW43C - 7 2026-07-17
BAW2065 British Airways 7 2026-07-23
BAW25K - 6 2026-06-21
BAW2231 British Airways 6 2026-06-06
BAW2230 British Airways 6 2026-06-07
BAW39D British Airways 5 2026-07-22
BAW38W British Airways 5 2026-07-23
BAW2159 British Airways 5 2026-07-25
BAW2158 British Airways 5 2026-07-25
BAW2239 - 4 2026-07-14
BAW12J British Airways 4 2026-06-04
BAW23K British Airways 3 2026-05-04
BAW2279 British Airways 3 2026-06-26
BAW2278 British Airways 3 2026-06-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 BAW2203 LGW → CUN Jul 26, 12:45 UTCJul 26, 21:45 UTC9h 0m
2026-07-26 BAW5KW UVF → LGW Jul 26, 07:15 UTCJul 26, 08:35 UTC1h 20m
2026-07-26 BAW5KW UVF → LGW Jul 26, 00:55 UTCJul 26, 01:10 UTC15m
2026-07-25 BAW2158 GND → UVF Jul 25, 23:00 UTCJul 25, 23:15 UTC15m
2026-07-25 BAW2159 UVF → TAB Jul 25, 20:30 UTCJul 25, 20:45 UTC15m
2026-07-25 BAW9VA LGW → UVF Jul 25, 10:55 UTCJul 25, 18:45 UTC7h 50m
2026-07-24 BAW2064 MRU → LGW Jul 24, 23:30 UTCJul 25, 04:20 UTC4h 50m
2026-07-23 BAW2064 MRU → LGW Jul 23, 23:50 UTCJul 24, 23:45 UTC23h 55m
2026-07-23 BAW2065 LGW → MRU Jul 23, 20:10 UTCJul 23, 23:55 UTC3h 45m
2026-07-23 BAW38W MCO → LGW Jul 23, 01:25 UTCJul 23, 09:25 UTC8h 0m
2026-07-22 BAW39D LGW → MCO Jul 22, 14:05 UTCJul 22, 22:20 UTC8h 15m
2026-07-22 - - Jul 22, 02:55 UTCJul 22, 03:05 UTC10m
2026-07-22 BAW2158 GND → UVF Jul 22, 01:15 UTCJul 22, 01:30 UTC15m
2026-07-21 BAW2159 UVF → TAB Jul 21, 22:55 UTCJul 21, 23:05 UTC10m
2026-07-21 BAW9VA LGW → UVF Jul 21, 13:35 UTCJul 21, 14:35 UTC1h 0m
2026-07-21 BAW38W MCO → LGW Jul 21, 00:55 UTCJul 21, 08:55 UTC8h 0m
2026-07-20 BAW39D LGW → MCO Jul 20, 14:10 UTCJul 20, 22:20 UTC8h 10m
2026-07-20 BAW2202 CUN → LGW Jul 20, 01:00 UTCJul 20, 10:30 UTC9h 30m
2026-07-19 BAW2203 LGW → CUN Jul 19, 13:15 UTCJul 19, 22:45 UTC9h 30m
2026-07-19 BAW5KW - Jul 19, 07:50 UTCJul 19, 09:05 UTC1h 15m
2026-07-19 BAW5KW - Jul 19, 00:50 UTCJul 19, 01:00 UTC10m
2026-07-18 BAW2158 GND → UVF Jul 18, 23:00 UTCJul 18, 23:15 UTC15m
2026-07-18 BAW2159 - Jul 18, 20:25 UTCJul 18, 20:40 UTC15m
2026-07-18 BAW9VA LGW → UVF Jul 18, 11:00 UTCJul 18, 11:55 UTC55m
2026-07-17 BAW63H MCO → LGW Jul 17, 21:55 UTCJul 18, 06:00 UTC8h 6m
2026-07-17 BAW43C LGW → MCO Jul 17, 10:05 UTCJul 17, 19:09 UTC9h 5m
2026-07-16 BAW63H MCO → LGW Jul 16, 21:35 UTCJul 17, 05:39 UTC8h 5m
2026-07-16 BAW43C LGW → MCO Jul 16, 10:29 UTCJul 16, 19:14 UTC8h 45m
2026-07-15 BAW2160 LGW → LGW Jul 15, 11:00 UTCJul 16, 04:20 UTC17h 20m
2026-07-14 BAW2238 - Jul 14, 21:30 UTCJul 15, 05:35 UTC8h 4m
2026-07-14 BAW2239 - Jul 14, 10:55 UTCJul 14, 19:05 UTC8h 10m
2026-07-13 BAW2202 CUN → LGW Jul 13, 01:01 UTCJul 13, 10:15 UTC9h 15m
2026-07-12 BAW2203 LGW → CUN Jul 12, 12:50 UTCJul 12, 22:25 UTC9h 35m
2026-07-12 BAW38W MCO → LGW Jul 12, 01:40 UTCJul 12, 09:40 UTC8h 0m
2026-07-11 BAW39D LGW → MCO Jul 11, 14:00 UTCJul 11, 22:40 UTC8h 40m
2026-07-11 BAW2202 CUN → LGW Jul 11, 00:50 UTCJul 11, 10:10 UTC9h 20m
2026-07-10 BAW2203 LGW → CUN Jul 10, 12:55 UTCJul 10, 22:40 UTC9h 45m
2026-07-10 BAW38W MCO → LGW Jul 10, 01:25 UTCJul 10, 09:30 UTC8h 5m
2026-07-09 BAW39D LGW → MCO Jul 9, 13:55 UTCJul 9, 22:35 UTC8h 40m
2026-07-08 BAW2202 CUN → LGW Jul 8, 04:00 UTCJul 8, 13:00 UTC9h 0m
2026-07-07 BAW2203 LGW → CUN Jul 7, 16:15 UTCJul 8, 01:55 UTC9h 40m
2026-07-07 BAW5KW - Jul 7, 07:10 UTCJul 7, 10:25 UTC3h 15m
2026-07-07 BAW5KW - Jul 7, 02:20 UTCJul 7, 02:30 UTC10m
2026-07-06 BAW2159 - Jul 6, 20:35 UTCJul 7, 00:50 UTC4h 15m
2026-07-06 BAW9VA - Jul 6, 11:05 UTCJul 6, 12:20 UTC1h 15m
2026-07-05 BAW2066 LGW → LGW Jul 5, 13:25 UTCJul 6, 04:25 UTC15h 0m
2026-07-05 BAW2202 - Jul 5, 05:10 UTCJul 5, 10:05 UTC4h 55m
2026-07-05 BAW2202 - Jul 5, 00:55 UTCJul 5, 02:40 UTC1h 45m
2026-07-04 BAW2203 LGW → CUN Jul 4, 13:10 UTCJul 4, 22:50 UTC9h 40m
2026-07-03 BAW63H MCO → LGW Jul 3, 21:25 UTCJul 4, 05:10 UTC7h 45m

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

Mode-S 4007EF frequently asked

What is Mode-S code 4007EF?
4007EF is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-YMMD.
Where is Mode-S 4007EF registered?
Mode-S code 4007EF 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 4007EF broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4007EF, octal 20003757, decimal 4,196,335.
What flights does 4007EF operate?
Mode-S 4007EF has broadcast 20 distinct callsigns, including BAW2203, BAW2202, BAW5KW, BAW9VA, BAW2064.