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 2h ago
Flights observed
116
Distinct callsigns
17
Country
GB
Last broadcast
2h ago

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
BAW54 - 12 2026-07-11
BAW7D - 11 2026-07-09
BAW55G - 11 2026-07-10
BAW4E - 11 2026-07-10
BAW57K British Airways 10 2026-07-02
BAW56 British Airways 10 2026-07-03
BAW5L British Airways 9 2026-06-17
BAW2X - 9 2026-06-18
BAW213 - 7 2026-07-13
BAW6R - 5 2026-06-22
BAW3G British Airways 5 2026-06-22
BAW212 - 5 2026-07-14
BAW8K - 3 2026-07-13
BAW193 - 3 2026-07-12
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
2026-07-14 BAW212 - Jul 14, 00:05 UTCJul 14, 01:20 UTC1h 15m
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
2026-06-20 BAW4E - Jun 20, 04:20 UTCJun 20, 14:14 UTC9h 55m
2026-06-19 BAW7D EWR → LHR Jun 19, 14:59 UTCJun 20, 01:09 UTC10h 10m
2026-06-18 BAW2X SFO → LHR Jun 18, 00:10 UTCJun 18, 10:00 UTC9h 50m
2026-06-17 BAW5L LHR → SFO Jun 17, 10:15 UTCJun 17, 20:25 UTC10h 10m
2026-06-16 BAW54 - Jun 16, 19:35 UTCJun 17, 06:30 UTC10h 56m
2026-06-15 BAW55G LHR → JNB Jun 15, 19:10 UTCJun 16, 05:15 UTC10h 5m
2026-06-15 BAW4E - Jun 15, 04:20 UTCJun 15, 14:10 UTC9h 50m
2026-06-14 BAW7D EWR → LHR Jun 14, 14:45 UTCJun 15, 01:10 UTC10h 25m
2026-06-13 BAW54 - Jun 13, 19:30 UTCJun 14, 06:05 UTC10h 35m
2026-06-12 BAW55G LHR → JNB Jun 12, 18:25 UTCJun 13, 04:40 UTC10h 15m
2026-06-12 BAW4E - Jun 12, 04:20 UTCJun 12, 14:10 UTC9h 50m
2026-06-11 BAW7D EWR → LHR Jun 11, 15:05 UTCJun 12, 01:25 UTC10h 20m
2026-06-10 BAW2X SFO → LHR Jun 10, 23:50 UTCJun 11, 09:40 UTC9h 50m
2026-06-10 BAW5L LHR → SFO Jun 10, 10:15 UTCJun 10, 20:30 UTC10h 15m
2026-06-09 BAW6R MIA → LHR Jun 9, 22:00 UTCJun 10, 05:50 UTC7h 50m
2026-06-09 BAW3G LHR → BOS Jun 9, 09:50 UTCJun 9, 18:30 UTC8h 40m
2026-06-08 BAW56 JNB → LHR Jun 8, 17:50 UTCJun 9, 04:30 UTC10h 40m
2026-06-07 BAW57K LHR → JNB Jun 7, 21:00 UTCJun 8, 07:20 UTC10h 20m
2026-06-07 BAW4E LAX → LHR Jun 7, 04:10 UTCJun 7, 14:00 UTC9h 50m
2026-06-06 BAW7D EWR → LHR Jun 6, 14:50 UTCJun 7, 01:04 UTC10h 15m
2026-06-06 BAW2X SFO → LHR Jun 6, 00:10 UTCJun 6, 09:55 UTC9h 45m
2026-06-05 BAW5L LHR → SFO Jun 5, 10:25 UTCJun 5, 20:45 UTC10h 20m

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 2h ago.
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 BAW54, BAW7D, BAW55G, BAW4E, BAW57K.