Apparatus

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sensors Mode-S transponder

40749A

ICAO 24-bit transponder address · allocated to United Kingdom

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

Hex
40749A
Octal
20072232
Decimal
4,224,154
Country
GB
Tail
G-ZBKS
Type
B789
Broadcasting now · callsign BAW5 · 36,250 ft
Flights observed
106
Distinct callsigns
20
Country
GB
Last broadcast
8h ago

Current position

40749A is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 40749A 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
BAW16 - 12 2026-07-14
BAW60 - 10 2026-07-10
BAW243 British Airways 10 2026-06-25
BAW242 - 9 2026-06-26
BAW15 - 9 2026-07-12
BAW34 - 8 2026-06-20
BAW61 British Airways 7 2026-07-09
BAW33 British Airways 6 2026-06-19
BAW36 - 5 2026-07-09
BAW81V - 3 2026-07-05
BAW6 - 3 2026-06-24
BAW5 British Airways 3 2026-06-23
BAW26E - 2 2026-07-04
BAW250 - 2 2026-07-08
BAW169 - 2 2026-07-05
BAW168 - 2 2026-07-06
BAW9172 British Airways 1 2026-05-07
BAW9171 British Airways 1 2026-06-13
BAW70Q - 1 2026-06-23
BAW51B British Airways 1 2026-05-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 BAW16 - Jul 14, 02:05 UTCJul 14, 06:05 UTC4h 0m
2026-07-13 BAW16 - Jul 13, 16:50 UTCJul 14, 02:00 UTC9h 10m
2026-07-13 - - Jul 13, 14:50 UTCJul 13, 15:00 UTC10m
2026-07-13 BAW16 - Jul 13, 07:35 UTCJul 13, 08:10 UTC35m
2026-07-12 BAW15 - Jul 12, 19:01 UTCJul 12, 19:40 UTC40m
2026-07-12 BAW15 - Jul 12, 12:45 UTCJul 12, 12:55 UTC10m
2026-07-11 BAW15 - Jul 11, 21:45 UTCJul 12, 10:20 UTC12h 35m
2026-07-11 BAW198 - Jul 11, 09:40 UTCJul 11, 16:40 UTC7h 0m
2026-07-10 BAW199 - Jul 10, 20:35 UTCJul 11, 04:50 UTC8h 15m
2026-07-10 BAW60 - Jul 10, 13:25 UTCJul 10, 17:00 UTC3h 35m
2026-07-09 BAW61 LHR → MLE Jul 9, 18:35 UTCJul 10, 13:20 UTC18h 45m
2026-07-09 BAW61 LHR → MLE Jul 9, 18:15 UTCJul 10, 13:20 UTC19h 5m
2026-07-09 BAW36 - Jul 9, 07:00 UTCJul 9, 10:45 UTC3h 45m
2026-07-09 BAW36 - Jul 9, 00:35 UTCJul 9, 06:25 UTC5h 50m
2026-07-08 BAW35 - Jul 8, 12:15 UTCJul 8, 16:30 UTC4h 15m
2026-07-08 BAW250 - Jul 8, 07:55 UTCJul 8, 09:15 UTC1h 20m
2026-07-07 BAW250 - Jul 7, 19:20 UTCJul 7, 19:30 UTC10m
2026-07-06 BAW251 LHR → SCL Jul 6, 21:35 UTCJul 6, 22:45 UTC1h 10m
2026-07-06 BAW168 - Jul 6, 04:45 UTCJul 6, 17:00 UTC12h 15m
2026-07-05 BAW168 - Jul 5, 14:55 UTCJul 6, 14:30 UTC23h 35m
2026-07-05 BAW169 - Jul 5, 12:35 UTCJul 6, 12:30 UTC23h 55m
2026-07-05 BAW169 - Jul 5, 11:30 UTCJul 6, 05:10 UTC17h 40m
2026-07-05 BAW81V - Jul 5, 03:45 UTCJul 5, 05:15 UTC1h 30m
2026-07-04 BAW81V - Jul 4, 20:45 UTCJul 5, 00:25 UTC3h 40m
2026-07-04 BAW26E - Jul 4, 08:45 UTCJul 4, 18:25 UTC9h 40m
2026-07-03 BAW81V - Jul 3, 20:45 UTCJul 4, 05:15 UTC8h 30m
2026-07-03 BAW26E - Jul 3, 08:35 UTCJul 3, 18:10 UTC9h 35m
2026-07-02 BAW16 SIN → LHR Jul 2, 15:05 UTCJul 3, 04:30 UTC13h 25m
2026-07-02 BAW16 SIN → LHR Jul 2, 12:45 UTCJul 2, 12:55 UTC10m
2026-07-02 BAW16 SIN → LHR Jul 2, 04:45 UTCJul 2, 05:15 UTC30m
2026-07-01 BAW15 SIN → SYD Jul 1, 12:45 UTCJul 1, 19:20 UTC6h 35m
2026-06-30 BAW15 SIN → SYD Jun 30, 21:35 UTCJul 1, 10:30 UTC12h 55m
2026-06-26 BAW242 - Jun 26, 04:39 UTCJun 26, 14:19 UTC9h 40m
2026-06-25 BAW243 LHR → MEX Jun 25, 14:29 UTCJun 26, 01:39 UTC11h 10m
2026-06-24 BAW6 HND → LHR Jun 24, 04:20 UTCJun 24, 18:29 UTC14h 10m
2026-06-23 BAW5 LHR → NRT Jun 23, 12:55 UTCJun 24, 01:44 UTC12h 50m
2026-06-23 BAW70Q - Jun 23, 02:04 UTCJun 23, 08:45 UTC6h 40m
2026-06-22 BAW171 LHR → PIT Jun 22, 16:10 UTCJun 22, 23:39 UTC7h 30m
2026-06-22 BAW270 LAS → LHR Jun 22, 00:40 UTCJun 22, 10:05 UTC9h 25m
2026-06-21 BAW271 LHR → LAS Jun 21, 11:49 UTCJun 21, 21:54 UTC10h 5m
2026-06-20 BAW34 - Jun 20, 18:04 UTCJun 21, 03:49 UTC9h 45m
2026-06-20 BAW34 - Jun 20, 14:59 UTCJun 20, 15:24 UTC25m
2026-06-19 BAW33 LHR → KUL Jun 19, 20:55 UTCJun 20, 09:05 UTC12h 10m
2026-06-18 BAW16 SIN → LHR Jun 18, 15:00 UTCJun 19, 04:19 UTC13h 19m
2026-06-18 BAW16 SIN → LHR Jun 18, 04:50 UTCJun 18, 11:40 UTC6h 50m
2026-06-17 BAW15 SIN → SYD Jun 17, 19:30 UTCJun 17, 20:20 UTC50m
2026-06-16 BAW15 SIN → SYD Jun 16, 23:20 UTCJun 17, 11:20 UTC12h 0m
2026-06-16 BAW242 - Jun 16, 06:40 UTCJun 16, 16:05 UTC9h 25m
2026-06-15 BAW243 LHR → MEX Jun 15, 17:40 UTCJun 16, 04:35 UTC10h 55m
2026-06-13 BAW9171 CWL → BOS Jun 13, 15:50 UTCJun 13, 16:25 UTC35m

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

Mode-S 40749A frequently asked

What is Mode-S code 40749A?
40749A is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-ZBKS.
Where is Mode-S 40749A registered?
Mode-S code 40749A 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 40749A broadcasting right now?
Yes. Mode-S 40749A is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 40749A, octal 20072232, decimal 4,224,154.
What flights does 40749A operate?
Mode-S 40749A has broadcast 20 distinct callsigns, including BAW16, BAW60, BAW243, BAW242, BAW15.