Apparatus

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sensors Mode-S transponder

406F77

ICAO 24-bit transponder address · allocated to United Kingdom

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

Hex
406F77
Octal
20067567
Decimal
4,222,839
Country
GB
Tail
G-ZBKK
Type
B789
No current signal · last broadcast 1h ago
Flights observed
164
Distinct callsigns
20
Country
GB
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 406F77.

Country allocation

The ICAO 24-bit address 406F77 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
BAW242 - 16 2026-06-21
BAW16 - 15 2026-07-12
BAW243 British Airways 14 2026-06-20
BAW139 - 14 2026-06-28
BAW138 - 14 2026-06-28
BAW15 - 13 2026-07-11
BAW33 British Airways 8 2026-07-07
BAW250 - 8 2026-06-27
BAW168 - 8 2026-07-10
BAW34 - 7 2026-07-08
BAW5 - 5 2026-07-13
BAW6 - 4 2026-07-03
BAW251 British Airways 4 2026-06-26
BAW169 - 4 2026-07-09
BAW271 British Airways 3 2026-06-19
BAW270 - 3 2026-06-20
BAW131 British Airways 3 2026-06-29
BAW130 British Airways 3 2026-06-29
BAW37J British Airways 2 2026-06-16
BAW199 British Airways 2 2026-04-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 BAW5 LHR → HND Jul 13, 12:25 UTCJul 14, 01:15 UTC12h 50m
2026-07-12 BAW16 - Jul 12, 15:10 UTCJul 13, 04:25 UTC13h 15m
2026-07-12 BAW16 - Jul 12, 12:35 UTCJul 12, 12:45 UTC10m
2026-07-12 BAW16 - Jul 12, 05:01 UTCJul 12, 05:55 UTC55m
2026-07-11 BAW15 - Jul 11, 12:50 UTCJul 11, 19:35 UTC6h 45m
2026-07-10 BAW15 - Jul 10, 22:00 UTCJul 11, 10:15 UTC12h 15m
2026-07-10 BAW168 - Jul 10, 06:20 UTCJul 10, 19:10 UTC12h 50m
2026-07-09 BAW168 - Jul 9, 15:50 UTCJul 10, 15:00 UTC23h 10m
2026-07-09 BAW169 - Jul 9, 13:50 UTCJul 10, 13:45 UTC23h 55m
2026-07-09 BAW169 - Jul 9, 12:10 UTCJul 10, 06:35 UTC18h 25m
2026-07-08 BAW34 - Jul 8, 15:20 UTCJul 9, 04:05 UTC12h 45m
2026-07-07 BAW33 LHR → KUL Jul 7, 21:00 UTCJul 8, 09:20 UTC12h 20m
2026-07-07 BAW168 - Jul 7, 04:45 UTCJul 7, 17:10 UTC12h 25m
2026-07-06 BAW168 - Jul 6, 13:50 UTCJul 7, 13:20 UTC23h 30m
2026-07-06 BAW169 - Jul 6, 11:35 UTCJul 7, 05:10 UTC17h 35m
2026-07-05 BAW16 SIN → LHR Jul 5, 15:15 UTCJul 6, 04:30 UTC13h 15m
2026-07-05 BAW16 SIN → LHR Jul 5, 04:45 UTCJul 5, 05:20 UTC35m
2026-07-04 BAW15 SIN → SYD Jul 4, 12:55 UTCJul 4, 20:05 UTC7h 10m
2026-07-04 BAW15 SIN → SYD Jul 4, 06:50 UTCJul 4, 10:05 UTC3h 15m
2026-07-03 BAW15 SIN → SYD Jul 3, 21:25 UTCJul 4, 06:45 UTC9h 20m
2026-07-03 BAW6 HND → LHR Jul 3, 04:30 UTCJul 3, 18:35 UTC14h 5m
2026-07-02 BAW5 LHR → NRT Jul 2, 13:00 UTCJul 3, 01:50 UTC12h 50m
2026-07-01 BAW6 HND → LHR Jul 1, 04:30 UTCJul 1, 18:30 UTC14h 0m
2026-06-30 BAW5 LHR → NRT Jun 30, 13:10 UTCJul 1, 02:20 UTC13h 10m
2026-06-29 BAW130 ABZ → LHR Jun 29, 21:44 UTCJun 30, 07:35 UTC9h 51m
2026-06-29 BAW131 LHR → BLR Jun 29, 19:00 UTCJun 29, 19:20 UTC20m
2026-06-29 BAW131 LHR → BLR Jun 29, 09:29 UTCJun 29, 17:34 UTC8h 5m
2026-06-28 BAW138 - Jun 28, 22:45 UTCJun 29, 05:34 UTC6h 50m
2026-06-28 BAW138 - Jun 28, 20:34 UTCJun 28, 22:39 UTC2h 5m
2026-06-28 BAW139 - Jun 28, 09:10 UTCJun 28, 17:44 UTC8h 35m
2026-06-27 BAW250 - Jun 27, 19:00 UTCJun 27, 19:55 UTC55m
2026-06-27 BAW250 - Jun 27, 06:44 UTCJun 27, 06:54 UTC10m
2026-06-26 BAW251 LHR → SCL Jun 26, 15:20 UTCJun 27, 02:29 UTC11h 10m
2026-06-25 BAW130 ABZ → LHR Jun 25, 22:54 UTCJun 26, 07:50 UTC8h 55m
2026-06-25 BAW130 ABZ → LHR Jun 25, 21:50 UTCJun 25, 22:14 UTC25m
2026-06-25 BAW131 LHR → BLR Jun 25, 09:59 UTCJun 25, 19:20 UTC9h 20m
2026-06-22 BAW34 - Jun 22, 15:20 UTCJun 23, 04:25 UTC13h 5m
2026-06-21 BAW33 LHR → KUL Jun 21, 20:50 UTCJun 22, 09:10 UTC12h 20m
2026-06-21 BAW242 - Jun 21, 05:04 UTCJun 21, 14:34 UTC9h 30m
2026-06-20 BAW243 LHR → MEX Jun 20, 14:59 UTCJun 21, 01:45 UTC10h 45m
2026-06-20 BAW270 LAS → LHR Jun 20, 00:34 UTCJun 20, 09:59 UTC9h 25m
2026-06-19 BAW271 LHR → LAS Jun 19, 11:39 UTCJun 19, 21:24 UTC9h 45m
2026-06-18 BAW242 - Jun 18, 04:15 UTCJun 18, 13:55 UTC9h 40m
2026-06-17 BAW243 LHR → MEX Jun 17, 14:50 UTCJun 18, 01:45 UTC10h 55m
2026-06-17 BAW18A JFK → LHR Jun 17, 03:45 UTCJun 17, 09:55 UTC6h 10m
2026-06-16 BAW37J LHR → JFK Jun 16, 17:00 UTCJun 16, 23:50 UTC6h 51m
2026-06-15 BAW250 - Jun 15, 07:25 UTCJun 15, 08:40 UTC1h 15m
2026-06-14 BAW250 - Jun 14, 19:20 UTCJun 14, 19:30 UTC10m
2026-06-13 BAW251 LHR → SCL Jun 13, 21:35 UTCJun 13, 22:25 UTC50m
2026-06-13 BAW242 - Jun 13, 04:25 UTCJun 13, 14:20 UTC9h 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-ZBKK page for operator, model, and routing details .

Mode-S 406F77 frequently asked

What is Mode-S code 406F77?
406F77 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-ZBKK.
Where is Mode-S 406F77 registered?
Mode-S code 406F77 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 406F77 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 406F77, octal 20067567, decimal 4,222,839.
What flights does 406F77 operate?
Mode-S 406F77 has broadcast 20 distinct callsigns, including BAW242, BAW16, BAW243, BAW139, BAW138.