Apparatus

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sensors Mode-S transponder

406D77

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-ZBKA · BOEING 787-9 Dreamliner

Hex
406D77
Octal
20066567
Decimal
4,222,327
Country
GB
Tail
G-ZBKA
Type
B789
No current signal · last broadcast 8h ago
Flights observed
78
Distinct callsigns
20
Country
GB
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S 406D77.

Country allocation

The ICAO 24-bit address 406D77 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
BAW168 British Airways 9 2026-05-24
BAW34 British Airways 8 2026-05-10
BAW33 British Airways 7 2026-05-09
BAW15 British Airways 7 2026-05-25
BAW16 British Airways 6 2026-05-26
BAW169 British Airways 5 2026-05-23
BAW6 British Airways 4 2026-05-29
BAW5 British Airways 4 2026-05-28
BAW60 British Airways 3 2026-05-16
BAW271 British Airways 3 2026-05-18
BAW270 British Airways 3 2026-05-19
BAW132 British Airways 3 2026-04-14
BAW250 British Airways 2 2026-04-26
BAW225Y British Airways 2 2026-05-15
BAW9EW British Airways 1 2026-04-28
BAW99 British Airways 1 2026-05-27
BAW98T British Airways 1 2026-05-28
BAW6NC British Airways 1 2026-04-27
BAW61 British Airways 1 2026-05-16
BAW251 British Airways 1 2026-04-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 BAW6 HND → LHR May 29, 06:30 UTCMay 29, 20:05 UTC13h 35m
2026-05-28 BAW5 LHR → NRT May 28, 12:55 UTCMay 29, 01:25 UTC12h 30m
2026-05-28 BAW98T YYZ → LHR May 28, 02:20 UTCMay 28, 08:55 UTC6h 35m
2026-05-27 BAW99 LHR → YYZ May 27, 16:55 UTCMay 27, 23:40 UTC6h 45m
2026-05-26 BAW16 SIN → LHR May 26, 15:00 UTCMay 27, 04:24 UTC13h 25m
2026-05-26 BAW16 SIN → LHR May 26, 04:45 UTCMay 26, 05:25 UTC40m
2026-05-25 BAW15 SIN → SYD May 25, 18:55 UTCMay 25, 19:54 UTC1h 0m
2026-05-24 BAW15 SIN → SYD May 24, 23:00 UTCMay 25, 10:00 UTC11h 0m
2026-05-24 BAW15 SIN → SYD May 24, 21:25 UTCMay 24, 21:45 UTC20m
2026-05-24 BAW168 PVG → LHR May 24, 09:30 UTCMay 24, 17:35 UTC8h 5m
2026-05-23 BAW168 PVG → LHR May 23, 18:50 UTCMay 24, 17:35 UTC22h 45m
2026-05-23 BAW168 PVG → LHR May 23, 15:50 UTCMay 24, 15:45 UTC23h 55m
2026-05-23 BAW169 LHR → PVG May 23, 13:50 UTCMay 24, 13:45 UTC23h 55m
2026-05-23 BAW169 LHR → PVG May 23, 11:50 UTCMay 24, 09:35 UTC21h 45m
2026-05-23 BAW169 LHR → PVG May 23, 11:30 UTCMay 24, 09:35 UTC22h 5m
2026-05-22 BAW16 SIN → LHR May 22, 15:00 UTCMay 23, 04:15 UTC13h 15m
2026-05-22 BAW16 SIN → LHR May 22, 05:00 UTCMay 22, 05:35 UTC35m
2026-05-21 BAW15 SIN → SYD May 21, 13:50 UTCMay 21, 19:35 UTC5h 45m
2026-05-20 BAW15 SIN → SYD May 20, 21:30 UTCMay 21, 10:15 UTC12h 45m
2026-05-19 BAW270 LAS → LHR May 19, 00:50 UTCMay 19, 10:00 UTC9h 10m
2026-05-18 BAW271 LHR → LAS May 18, 12:05 UTCMay 18, 22:10 UTC10h 4m
2026-05-16 BAW60 MLE → LHR May 16, 23:35 UTCMay 17, 17:01 UTC17h 26m
2026-05-16 BAW60 MLE → LHR May 16, 19:50 UTCMay 17, 17:01 UTC21h 10m
2026-05-16 BAW60 MLE → LHR May 16, 17:50 UTCMay 17, 17:01 UTC23h 10m
2026-05-16 BAW61 LHR → MLE May 16, 17:40 UTCMay 17, 15:45 UTC22h 5m
2026-05-16 BAW224U MSY → LHR May 16, 03:20 UTCMay 16, 11:31 UTC8h 11m
2026-05-15 BAW225Y LHR → MSY May 15, 21:20 UTCMay 16, 00:45 UTC3h 25m
2026-05-15 BAW225Y LHR → MSY May 15, 15:40 UTCMay 15, 21:10 UTC5h 30m
2026-05-15 BAW270 LAS → LHR May 15, 00:35 UTCMay 15, 09:50 UTC9h 15m
2026-05-14 BAW271 LHR → LAS May 14, 11:55 UTCMay 14, 22:05 UTC10h 10m
2026-05-13 BAW6 HND → LHR May 13, 04:15 UTCMay 13, 18:15 UTC14h 0m
2026-05-12 BAW5 LHR → NRT May 12, 12:40 UTCMay 13, 01:50 UTC13h 10m
2026-05-10 BAW34 LHR → KUL May 10, 17:59 UTCMay 11, 04:35 UTC10h 35m
2026-05-10 BAW34 LHR → KUL May 10, 15:19 UTCMay 10, 15:35 UTC15m
2026-05-09 BAW33 LHR → KUL May 9, 20:49 UTCMay 10, 08:54 UTC12h 5m
2026-05-09 BAW242 MEX → LHR May 9, 05:25 UTCMay 9, 15:00 UTC9h 35m
2026-05-08 BAW243 LHR → MEX May 8, 15:15 UTCMay 9, 02:40 UTC11h 25m
2026-05-07 BAW16 SIN → LHR May 7, 15:15 UTCMay 8, 04:34 UTC13h 20m
2026-05-07 BAW16 SIN → LHR May 7, 04:45 UTCMay 7, 05:15 UTC30m
2026-05-06 BAW15 LHR → SIN May 6, 18:55 UTCMay 6, 19:35 UTC40m
2026-05-05 BAW15 LHR → SIN May 5, 21:25 UTCMay 6, 09:45 UTC12h 20m
2026-05-05 BAW168 PVG → LHR May 5, 04:45 UTCMay 5, 17:25 UTC12h 40m
2026-05-04 BAW168 PVG → LHR May 4, 18:55 UTCMay 5, 17:25 UTC22h 30m
2026-05-04 BAW168 PVG → LHR May 4, 15:50 UTCMay 5, 15:45 UTC23h 56m
2026-05-04 BAW169 LHR → PVG May 4, 13:50 UTCMay 5, 13:45 UTC23h 56m
2026-05-04 BAW169 LHR → PVG May 4, 11:30 UTCMay 5, 05:05 UTC17h 36m
2026-05-03 BAW6 HND → LHR May 3, 05:15 UTCMay 3, 18:55 UTC13h 40m
2026-05-02 BAW5 LHR → NRT May 2, 13:40 UTCMay 3, 02:55 UTC13h 15m
2026-05-01 BAW34 LHR → KUL May 1, 18:10 UTCMay 2, 04:15 UTC10h 5m
2026-05-01 BAW34 LHR → KUL May 1, 15:20 UTCMay 1, 15:35 UTC15m

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

Mode-S 406D77 frequently asked

What is Mode-S code 406D77?
406D77 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-ZBKA.
Where is Mode-S 406D77 registered?
Mode-S code 406D77 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 406D77 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 406D77, octal 20066567, decimal 4,222,327.
What flights does 406D77 operate?
Mode-S 406D77 has broadcast 20 distinct callsigns, including BAW168, BAW34, BAW33, BAW15, BAW16.