Apparatus

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sensors Mode-S transponder

40688B

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-XLEA · AIRBUS A-380-800

Hex
40688B
Octal
20064213
Decimal
4,221,067
Country
GB
Tail
G-XLEA
Type
A388
No current signal · last broadcast Jul 26, 21:00 UTC
Flights observed
138
Distinct callsigns
17
Country
GB
Last broadcast
Jul 26, 21:00 UTC

Last known position

Most recent position reported by Mode-S 40688B.

Country allocation

The ICAO 24-bit address 40688B 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 17 distinct

Callsign Airline Flights Last seen
BAW7D - 12 2026-07-17
BAW56 British Airways 12 2026-07-22
BAW55G - 12 2026-07-18
BAW54 - 12 2026-07-11
BAW4E British Airways 12 2026-07-18
BAW57K - 11 2026-07-21
BAW5L British Airways 10 2026-07-26
BAW213 British Airways 10 2026-07-25
BAW2X - 9 2026-06-18
BAW6R British Airways 8 2026-07-23
BAW3G British Airways 8 2026-07-23
BAW212 British Airways 8 2026-07-26
BAW193 - 5 2026-07-14
BAW8K - 4 2026-07-15
BAW5E British Airways 2 2026-05-19
BAW34N British Airways 2 2026-05-20
BAW54D British Airways 1 2026-05-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 BAW5L LHR → SFO Jul 26, 10:15 UTCJul 26, 20:55 UTC10h 40m
2026-07-26 BAW212 BOS → LHR Jul 26, 00:30 UTCJul 26, 06:30 UTC6h 0m
2026-07-25 BAW213 LHR → BOS Jul 25, 14:00 UTCJul 25, 20:30 UTC6h 30m
2026-07-25 BAW212 BOS → LHR Jul 25, 00:05 UTCJul 25, 05:50 UTC5h 45m
2026-07-24 BAW213 LHR → BOS Jul 24, 14:00 UTCJul 24, 20:30 UTC6h 30m
2026-07-23 BAW6R MIA → LHR Jul 23, 21:25 UTCJul 24, 05:20 UTC7h 55m
2026-07-23 BAW3G LHR → BOS Jul 23, 09:55 UTCJul 23, 18:05 UTC8h 10m
2026-07-22 BAW56 JNB → LHR Jul 22, 17:40 UTCJul 23, 04:05 UTC10h 25m
2026-07-21 BAW57K - Jul 21, 21:15 UTCJul 21, 23:05 UTC1h 50m
2026-07-20 BAW6R MIA → LHR Jul 20, 21:45 UTCJul 21, 05:50 UTC8h 4m
2026-07-20 BAW3G - Jul 20, 10:00 UTCJul 20, 18:15 UTC8h 15m
2026-07-19 BAW56 - Jul 19, 17:35 UTCJul 20, 04:00 UTC10h 25m
2026-07-18 BAW55G - Jul 18, 20:10 UTCJul 19, 06:10 UTC10h 0m
2026-07-18 BAW4E LAX → LHR Jul 18, 04:15 UTCJul 18, 14:00 UTC9h 45m
2026-07-17 BAW7D - Jul 17, 15:00 UTCJul 18, 01:15 UTC10h 15m
2026-07-16 BAW6R MIA → LHR Jul 16, 22:05 UTCJul 17, 06:20 UTC8h 15m
2026-07-16 BAW3G - Jul 16, 09:55 UTCJul 16, 18:34 UTC8h 40m
2026-07-16 BAW212 BOS → LHR Jul 16, 00:20 UTCJul 16, 06:20 UTC6h 0m
2026-07-15 BAW213 - Jul 15, 14:45 UTCJul 15, 21:15 UTC6h 30m
2026-07-15 BAW8K - Jul 15, 01:55 UTCJul 15, 10:55 UTC9h 0m
2026-07-14 BAW193 - Jul 14, 18:05 UTCJul 14, 21:40 UTC3h 35m
2026-07-14 BAW193 - Jul 14, 12:35 UTCJul 14, 18:00 UTC5h 25m
2026-07-14 BAW212 BOS → LHR Jul 14, 00:05 UTCJul 14, 06:10 UTC6h 5m
2026-07-13 BAW213 - Jul 13, 14:05 UTCJul 13, 20:25 UTC6h 20m
2026-07-13 BAW8K DFW → LHR Jul 13, 01:40 UTCJul 13, 10:20 UTC8h 40m
2026-07-12 BAW193 LHR → DFW Jul 12, 13:01 UTCJul 12, 22:05 UTC9h 5m
2026-07-11 BAW54 - Jul 11, 19:30 UTCJul 12, 06:01 UTC10h 30m
2026-07-10 BAW55G - Jul 10, 18:55 UTCJul 11, 05:05 UTC10h 10m
2026-07-10 BAW4E - Jul 10, 04:10 UTCJul 10, 14:15 UTC10h 5m
2026-07-09 BAW7D - Jul 9, 14:45 UTCJul 10, 01:10 UTC10h 25m
2026-07-08 BAW54 - Jul 8, 19:35 UTCJul 9, 06:10 UTC10h 35m
2026-07-07 BAW55G LHR → JNB Jul 7, 18:30 UTCJul 8, 04:30 UTC10h 0m
2026-07-06 BAW54 - Jul 6, 19:30 UTCJul 7, 05:55 UTC10h 25m
2026-07-05 BAW55G LHR → JNB Jul 5, 18:25 UTCJul 6, 04:45 UTC10h 20m
2026-07-05 BAW4E - Jul 5, 04:05 UTCJul 5, 14:00 UTC9h 55m
2026-07-04 BAW7D EWR → LHR Jul 4, 14:40 UTCJul 5, 01:05 UTC10h 25m
2026-07-03 BAW56 JNB → LHR Jul 3, 17:45 UTCJul 4, 04:05 UTC10h 20m
2026-07-02 BAW57K LHR → JNB Jul 2, 21:00 UTCJul 3, 07:10 UTC10h 10m
2026-07-02 BAW212 BOS → LHR Jul 2, 01:50 UTCJul 2, 07:40 UTC5h 50m
2026-07-01 BAW213 LHR → BOS Jul 1, 15:45 UTCJul 1, 22:30 UTC6h 45m
2026-06-27 BAW56 JNB → LHR Jun 27, 18:20 UTCJun 28, 04:55 UTC10h 35m
2026-06-26 BAW57K LHR → JNB Jun 26, 22:10 UTCJun 27, 08:25 UTC10h 15m
2026-06-25 BAW8K DFW → LHR Jun 25, 01:09 UTCJun 25, 09:29 UTC8h 20m
2026-06-24 BAW193 - Jun 24, 13:00 UTCJun 24, 22:10 UTC9h 10m
2026-06-24 BAW8K DFW → LHR Jun 24, 01:09 UTCJun 24, 09:39 UTC8h 30m
2026-06-23 BAW193 - Jun 23, 12:25 UTCJun 23, 21:45 UTC9h 20m
2026-06-22 BAW6R - Jun 22, 21:30 UTCJun 23, 05:24 UTC7h 55m
2026-06-22 BAW3G LHR → BOS Jun 22, 09:30 UTCJun 22, 18:35 UTC9h 5m
2026-06-21 BAW56 JNB → LHR Jun 21, 17:45 UTCJun 22, 03:45 UTC10h 0m
2026-06-20 BAW55G LHR → JNB Jun 20, 18:19 UTCJun 21, 04:44 UTC10h 25m

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

Mode-S 40688B frequently asked

What is Mode-S code 40688B?
40688B is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-XLEA.
Where is Mode-S 40688B registered?
Mode-S code 40688B 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 40688B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 40688B, octal 20064213, decimal 4,221,067.
What flights does 40688B operate?
Mode-S 40688B has broadcast 17 distinct callsigns, including BAW7D, BAW56, BAW55G, BAW54, BAW4E.