Apparatus

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sensors Mode-S transponder

40749B

ICAO 24-bit transponder address · allocated to United Kingdom

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

Hex
40749B
Octal
20072233
Decimal
4,224,155
Country
GB
Tail
G-ZBKR
Type
B789
Broadcasting now · callsign BAW61 · 36,975 ft
Flights observed
95
Distinct callsigns
20
Country
GB
Last broadcast
33m ago

Current position

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

Country allocation

The ICAO 24-bit address 40749B 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 12 2026-05-23
BAW15 British Airways 9 2026-04-16
BAW34 British Airways 8 2026-05-27
BAW169 British Airways 8 2026-05-22
BAW16 British Airways 7 2026-04-18
BAW33 British Airways 5 2026-05-27
BAW271 British Airways 4 2026-05-29
BAW270 British Airways 4 2026-05-30
BAW250 British Airways 3 2026-05-24
BAW243 British Airways 3 2026-05-25
BAW9EW British Airways 2 2026-05-29
BAW99 British Airways 2 2026-05-06
BAW98T British Airways 2 2026-05-07
BAW70Q British Airways 2 2026-05-16
BAW6NC British Airways 2 2026-05-28
BAW251 British Airways 2 2026-05-23
BAW242 British Airways 2 2026-05-26
BAW171 British Airways 2 2026-05-15
BAW9ZY British Airways 1 2026-04-21
BAW9605 British Airways 1 2026-04-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 BAW61 LHR → MLE May 30, 17:55 UTCMay 30, 20:45 UTC2h 50m
2026-05-30 BAW270 LAS → LHR May 30, 00:30 UTCMay 30, 10:00 UTC9h 30m
2026-05-29 BAW271 LHR → LAS May 29, 11:40 UTCMay 29, 21:40 UTC10h 0m
2026-05-29 BAW9EW YUL → LHR May 29, 02:50 UTCMay 29, 09:00 UTC6h 10m
2026-05-28 BAW6NC LHR → YUL May 28, 18:35 UTCMay 29, 00:40 UTC6h 5m
2026-05-27 BAW34 LHR → KUL May 27, 18:05 UTCMay 28, 04:40 UTC10h 35m
2026-05-27 BAW34 LHR → KUL May 27, 15:20 UTCMay 27, 15:35 UTC15m
2026-05-27 BAW33 LHR → KUL May 27, 08:55 UTCMay 27, 09:20 UTC25m
2026-05-26 BAW33 LHR → KUL May 26, 21:20 UTCMay 27, 05:29 UTC8h 10m
2026-05-26 BAW242 MEX → LHR May 26, 04:54 UTCMay 26, 14:40 UTC9h 45m
2026-05-25 BAW243 LHR → MEX May 25, 14:40 UTCMay 26, 01:30 UTC10h 50m
2026-05-24 BAW250 SCL → LHR May 24, 21:15 UTCMay 25, 08:40 UTC11h 25m
2026-05-24 BAW250 SCL → LHR May 24, 19:25 UTCMay 24, 19:40 UTC15m
2026-05-23 BAW251 LHR → SCL May 23, 21:50 UTCMay 24, 09:50 UTC12h 0m
2026-05-23 BAW168 PVG → LHR May 23, 09:10 UTCMay 23, 17:10 UTC8h 0m
2026-05-22 BAW168 PVG → LHR May 22, 19:05 UTCMay 23, 17:10 UTC22h 5m
2026-05-22 BAW168 PVG → LHR May 22, 15:35 UTCMay 23, 14:45 UTC23h 9m
2026-05-22 BAW169 LHR → PVG May 22, 12:50 UTCMay 23, 12:45 UTC23h 54m
2026-05-22 BAW169 LHR → PVG May 22, 11:45 UTCMay 23, 09:10 UTC21h 24m
2026-05-21 BAW298 ORD → LHR May 21, 01:40 UTCMay 21, 08:35 UTC6h 55m
2026-05-20 BAW299 LHR → ORD May 20, 14:45 UTCMay 20, 22:55 UTC8h 10m
2026-05-20 BAW250 SCL → LHR May 20, 09:10 UTCMay 20, 12:05 UTC2h 55m
2026-05-18 BAW251 LHR → SCL May 18, 21:35 UTCMay 18, 22:30 UTC55m
2026-05-18 BAW168 PVG → LHR May 18, 04:55 UTCMay 18, 17:25 UTC12h 30m
2026-05-17 BAW168 PVG → LHR May 17, 18:50 UTCMay 18, 17:25 UTC22h 35m
2026-05-17 BAW168 PVG → LHR May 17, 15:15 UTCMay 18, 14:45 UTC23h 30m
2026-05-17 BAW169 LHR → PVG May 17, 12:50 UTCMay 18, 12:45 UTC23h 55m
2026-05-17 BAW169 LHR → PVG May 17, 11:30 UTCMay 18, 05:20 UTC17h 50m
2026-05-17 BAW49N EWR → LHR May 17, 01:40 UTCMay 17, 07:55 UTC6h 15m
2026-05-16 BAW189 LHR → EWR May 16, 16:05 UTCMay 16, 23:10 UTC7h 5m
2026-05-16 BAW70Q PIT → LHR May 16, 04:00 UTCMay 16, 10:46 UTC6h 46m
2026-05-15 BAW171 LHR → PIT May 15, 18:25 UTCMay 16, 01:45 UTC7h 20m
2026-05-15 BAW242 MEX → LHR May 15, 05:20 UTCMay 15, 15:00 UTC9h 39m
2026-05-14 BAW243 LHR → MEX May 14, 16:15 UTCMay 15, 03:05 UTC10h 50m
2026-05-14 BAW70Q PIT → LHR May 14, 04:45 UTCMay 14, 11:25 UTC6h 40m
2026-05-13 BAW171 LHR → PIT May 13, 19:10 UTCMay 14, 02:30 UTC7h 20m
2026-05-13 BAW26V PDX → LHR May 13, 04:05 UTCMay 13, 12:55 UTC8h 50m
2026-05-12 BAW71K LHR → PDX May 12, 16:20 UTCMay 13, 01:55 UTC9h 35m
2026-05-12 BAW270 LAS → LHR May 12, 02:45 UTCMay 12, 10:00 UTC7h 15m
2026-05-11 BAW271 LHR → LAS May 11, 11:40 UTCMay 11, 22:35 UTC10h 55m
2026-05-10 BAW138 BOM → LHR May 10, 21:00 UTCMay 11, 06:10 UTC9h 10m
2026-05-10 BAW139 LHR → BOM May 10, 09:10 UTCMay 10, 17:10 UTC8h 0m
2026-05-07 BAW98T YYZ → LHR May 7, 02:15 UTCMay 7, 08:45 UTC6h 30m
2026-05-06 BAW99 LHR → YYZ May 6, 16:35 UTCMay 7, 00:00 UTC7h 25m
2026-05-06 BAW51B BOS → LHR May 6, 02:15 UTCMay 6, 08:20 UTC6h 5m
2026-05-05 BAW50G LHR → BOS May 5, 17:05 UTCMay 5, 23:40 UTC6h 35m
2026-05-05 BAW98T YYZ → LHR May 5, 02:15 UTCMay 5, 09:00 UTC6h 45m
2026-05-04 BAW99 LHR → YYZ May 4, 16:50 UTCMay 4, 23:45 UTC6h 56m
2026-05-02 BAW270 LAS → LHR May 2, 00:55 UTCMay 2, 10:50 UTC9h 55m
2026-05-01 BAW271 LHR → LAS May 1, 11:55 UTCMay 1, 22:05 UTC10h 10m

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

Mode-S 40749B frequently asked

What is Mode-S code 40749B?
40749B is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-ZBKR.
Where is Mode-S 40749B registered?
Mode-S code 40749B 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 40749B broadcasting right now?
Yes. Mode-S 40749B is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 40749B, octal 20072233, decimal 4,224,155.
What flights does 40749B operate?
Mode-S 40749B has broadcast 20 distinct callsigns, including BAW168, BAW15, BAW34, BAW169, BAW16.