Apparatus

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sensors Mode-S transponder

40688C

ICAO 24-bit transponder address · allocated to United Kingdom

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

Hex
40688C
Octal
20064214
Decimal
4,221,068
Country
GB
Tail
G-XLEB
Type
A388
Broadcasting now · callsign BAW2X · 37,000 ft
Flights observed
90
Distinct callsigns
16
Country
GB
Last broadcast
5h ago

Current position

40688C is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 40688C 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 16 distinct

Callsign Airline Flights Last seen
BAW5E British Airways 14 2026-04-24
BAW34N British Airways 13 2026-04-25
BAW57K British Airways 7 2026-05-23
BAW7D British Airways 6 2026-05-26
BAW56 British Airways 6 2026-05-18
BAW4E British Airways 6 2026-05-27
BAW213 British Airways 6 2026-05-22
BAW212 British Airways 6 2026-05-22
BAW6R British Airways 5 2026-05-13
BAW5L British Airways 5 2026-05-29
BAW3G British Airways 5 2026-05-13
BAW2X British Airways 4 2026-05-26
BAW54 British Airways 3 2026-05-28
BAW55G British Airways 2 2026-05-27
BAW8K British Airways 1 2026-05-22
BAW193 British Airways 1 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 BAW5L LHR → SFO May 29, 10:25 UTCMay 29, 20:40 UTC10h 15m
2026-05-28 BAW54 JNB → LHR May 28, 19:35 UTCMay 29, 06:05 UTC10h 30m
2026-05-27 BAW55G LHR → JNB May 27, 18:40 UTCMay 28, 04:45 UTC10h 5m
2026-05-27 BAW4E LAX → LHR May 27, 04:09 UTCMay 27, 14:05 UTC9h 56m
2026-05-26 BAW7D EWR → LHR May 26, 14:45 UTCMay 27, 01:19 UTC10h 35m
2026-05-26 BAW2X SFO → LHR May 26, 00:00 UTCMay 26, 09:49 UTC9h 50m
2026-05-25 BAW5L LHR → SFO May 25, 10:10 UTCMay 25, 20:40 UTC10h 29m
2026-05-24 BAW54 JNB → LHR May 24, 19:35 UTCMay 25, 06:25 UTC10h 50m
2026-05-23 BAW57K LHR → JNB May 23, 21:05 UTCMay 24, 07:20 UTC10h 15m
2026-05-22 BAW212 BOS → LHR May 22, 23:50 UTCMay 23, 05:40 UTC5h 50m
2026-05-22 BAW213 LHR → BOS May 22, 14:00 UTCMay 22, 20:30 UTC6h 30m
2026-05-22 BAW8K DFW → LHR May 22, 01:25 UTCMay 22, 09:40 UTC8h 15m
2026-05-21 BAW193 LHR → DFW May 21, 12:30 UTCMay 21, 22:00 UTC9h 30m
2026-05-21 BAW212 BOS → LHR May 21, 00:30 UTCMay 21, 06:20 UTC5h 50m
2026-05-20 BAW213 LHR → BOS May 20, 13:55 UTCMay 20, 20:30 UTC6h 35m
2026-05-20 BAW2X SFO → LHR May 20, 00:35 UTCMay 20, 10:05 UTC9h 31m
2026-05-19 BAW5L LHR → SFO May 19, 10:25 UTCMay 19, 20:25 UTC10h 0m
2026-05-18 BAW56 JNB → LHR May 18, 17:50 UTCMay 19, 04:35 UTC10h 44m
2026-05-17 BAW57K LHR → JNB May 17, 20:50 UTCMay 18, 07:05 UTC10h 15m
2026-05-17 BAW4E LAX → LHR May 17, 04:15 UTCMay 17, 14:01 UTC9h 45m
2026-05-16 BAW7D EWR → LHR May 16, 14:51 UTCMay 17, 01:10 UTC10h 20m
2026-05-16 BAW212 BOS → LHR May 16, 01:05 UTCMay 16, 07:01 UTC5h 56m
2026-05-15 BAW213 LHR → BOS May 15, 14:25 UTCMay 15, 21:15 UTC6h 49m
2026-05-15 BAW212 BOS → LHR May 15, 05:00 UTCMay 15, 10:35 UTC5h 35m
2026-05-14 BAW213 LHR → BOS May 14, 19:20 UTCMay 15, 02:15 UTC6h 55m
2026-05-13 BAW6R MIA → LHR May 13, 23:55 UTCMay 14, 07:55 UTC8h 0m
2026-05-13 BAW3G LHR → BOS May 13, 10:15 UTCMay 13, 19:50 UTC9h 35m
2026-05-12 BAW56 JNB → LHR May 12, 17:40 UTCMay 13, 04:20 UTC10h 40m
2026-05-11 BAW57K LHR → JNB May 11, 20:40 UTCMay 12, 07:10 UTC10h 30m
2026-05-11 BAW4E LAX → LHR May 11, 04:05 UTCMay 11, 13:55 UTC9h 50m
2026-05-10 BAW7D EWR → LHR May 10, 14:49 UTCMay 11, 01:20 UTC10h 30m
2026-05-09 BAW6R MIA → LHR May 9, 21:14 UTCMay 10, 05:30 UTC8h 15m
2026-05-09 BAW3G LHR → BOS May 9, 09:25 UTCMay 9, 18:20 UTC8h 55m
2026-05-07 BAW2X SFO → LHR May 7, 23:59 UTCMay 8, 09:49 UTC9h 50m
2026-05-07 BAW5L LHR → SFO May 7, 10:30 UTCMay 7, 20:40 UTC10h 10m
2026-05-06 BAW212 BOS → LHR May 6, 23:50 UTCMay 7, 05:50 UTC6h 0m
2026-05-06 BAW213 LHR → BOS May 6, 13:55 UTCMay 6, 20:50 UTC6h 54m
2026-05-05 BAW56 JNB → LHR May 5, 17:50 UTCMay 6, 04:40 UTC10h 50m
2026-05-04 BAW57K LHR → JNB May 4, 20:35 UTCMay 5, 06:45 UTC10h 10m
2026-05-04 BAW4E LAX → LHR May 4, 04:00 UTCMay 4, 13:40 UTC9h 40m
2026-05-03 BAW7D EWR → LHR May 3, 14:30 UTCMay 4, 01:00 UTC10h 30m
2026-05-03 BAW2X SFO → LHR May 3, 00:15 UTCMay 3, 09:45 UTC9h 29m
2026-05-02 BAW5L LHR → SFO May 2, 10:15 UTCMay 2, 20:50 UTC10h 35m
2026-05-01 BAW6R MIA → LHR May 1, 21:50 UTCMay 2, 06:00 UTC8h 11m
2026-05-01 BAW3G LHR → BOS May 1, 09:35 UTCMay 1, 18:25 UTC8h 50m
2026-04-30 BAW212 BOS → LHR Apr 30, 23:50 UTCMay 1, 06:00 UTC6h 11m
2026-04-30 BAW213 LHR → BOS Apr 30, 14:00 UTCApr 30, 20:25 UTC6h 25m
2026-04-29 BAW54 JNB → LHR Apr 29, 19:30 UTCApr 30, 06:10 UTC10h 39m
2026-04-28 BAW55G LHR → JNB Apr 28, 18:25 UTCApr 29, 04:49 UTC10h 25m
2026-04-27 BAW4E LAX → LHR Apr 27, 04:25 UTCApr 27, 14:10 UTC9h 45m

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

Mode-S 40688C frequently asked

What is Mode-S code 40688C?
40688C is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-XLEB.
Where is Mode-S 40688C registered?
Mode-S code 40688C 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 40688C broadcasting right now?
Yes. Mode-S 40688C is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 40688C, octal 20064214, decimal 4,221,068.
What flights does 40688C operate?
Mode-S 40688C has broadcast 16 distinct callsigns, including BAW5E, BAW34N, BAW57K, BAW7D, BAW56.