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 BAW54 · 38,000 ft
Flights observed
176
Distinct callsigns
16
Country
GB
Last broadcast
Jul 26, 19:55 UTC

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
BAW57K British Airways 15 2026-07-25
BAW56 - 15 2026-07-17
BAW5E British Airways 14 2026-04-24
BAW213 - 14 2026-07-12
BAW212 - 14 2026-07-12
BAW34N British Airways 13 2026-04-25
BAW2X - 13 2026-07-12
BAW5L - 12 2026-07-11
BAW7D British Airways 11 2026-07-24
BAW4E British Airways 11 2026-07-25
BAW193 British Airways 9 2026-07-23
BAW6R British Airways 8 2026-07-18
BAW3G - 8 2026-07-18
BAW8K British Airways 7 2026-07-24
BAW55G - 6 2026-07-21
BAW54 British Airways 6 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 BAW54 JNB → LHR Jul 26, 19:30 UTCJul 26, 19:55 UTC25m
2026-07-25 BAW57K LHR → JNB Jul 25, 21:00 UTCJul 26, 07:15 UTC10h 16m
2026-07-25 BAW4E LAX → LHR Jul 25, 04:20 UTCJul 25, 13:50 UTC9h 30m
2026-07-24 BAW7D EWR → LHR Jul 24, 14:45 UTCJul 25, 01:20 UTC10h 35m
2026-07-24 BAW8K DFW → LHR Jul 24, 01:00 UTCJul 24, 09:35 UTC8h 35m
2026-07-23 BAW193 LHR → DFW Jul 23, 17:00 UTCJul 23, 22:20 UTC5h 20m
2026-07-23 BAW193 LHR → DFW Jul 23, 12:45 UTCJul 23, 14:00 UTC1h 15m
2026-07-22 BAW54 JNB → LHR Jul 22, 19:25 UTCJul 23, 06:15 UTC10h 50m
2026-07-21 BAW55G - Jul 21, 18:30 UTCJul 22, 04:45 UTC10h 15m
2026-07-21 BAW4E LAX → LHR Jul 21, 04:05 UTCJul 21, 13:50 UTC9h 45m
2026-07-20 BAW7D - Jul 20, 14:45 UTCJul 21, 01:10 UTC10h 25m
2026-07-20 BAW8K DFW → LHR Jul 20, 01:10 UTCJul 20, 09:55 UTC8h 45m
2026-07-19 BAW193 LHR → DFW Jul 19, 12:20 UTCJul 19, 21:30 UTC9h 10m
2026-07-18 BAW6R MIA → LHR Jul 18, 21:30 UTCJul 19, 05:40 UTC8h 10m
2026-07-18 BAW3G - Jul 18, 09:30 UTCJul 18, 18:00 UTC8h 30m
2026-07-17 BAW56 - Jul 17, 17:50 UTCJul 18, 04:20 UTC10h 31m
2026-07-16 BAW57K - Jul 16, 22:25 UTCJul 17, 08:40 UTC10h 15m
2026-07-14 BAW56 - Jul 14, 17:50 UTCJul 15, 04:25 UTC10h 34m
2026-07-13 BAW57K - Jul 13, 20:10 UTCJul 14, 06:55 UTC10h 45m
2026-07-12 BAW212 BOS → LHR Jul 12, 23:55 UTCJul 13, 05:55 UTC6h 0m
2026-07-12 BAW213 LHR → BOS Jul 12, 14:05 UTCJul 12, 21:00 UTC6h 55m
2026-07-12 BAW2X SFO → LHR Jul 12, 00:01 UTCJul 12, 09:25 UTC9h 25m
2026-07-11 BAW5L LHR → SFO Jul 11, 10:20 UTCJul 11, 21:00 UTC10h 40m
2026-07-10 BAW56 GCJ → LHR Jul 10, 17:45 UTCJul 11, 04:25 UTC10h 40m
2026-07-09 BAW57K - Jul 9, 20:55 UTCJul 10, 07:25 UTC10h 30m
2026-07-09 BAW2X SFO → LHR Jul 9, 00:05 UTCJul 9, 09:45 UTC9h 40m
2026-07-08 BAW5L - Jul 8, 10:30 UTCJul 8, 20:45 UTC10h 15m
2026-07-07 BAW212 BOS → LHR Jul 7, 23:50 UTCJul 8, 05:55 UTC6h 5m
2026-07-07 BAW213 LHR → BOS Jul 7, 14:15 UTCJul 7, 21:00 UTC6h 45m
2026-07-07 BAW212 - Jul 7, 00:05 UTCJul 7, 06:00 UTC5h 55m
2026-07-06 BAW213 LHR → BOS Jul 6, 14:00 UTCJul 6, 20:45 UTC6h 45m
2026-07-05 BAW6R - Jul 5, 21:40 UTCJul 6, 05:30 UTC7h 50m
2026-07-05 BAW3G LHR → BOS Jul 5, 09:30 UTCJul 5, 18:10 UTC8h 40m
2026-07-03 BAW212 BOS → LHR Jul 3, 00:45 UTCJul 3, 06:55 UTC6h 10m
2026-07-02 BAW213 LHR → BOS Jul 2, 14:00 UTCJul 2, 21:00 UTC7h 0m
2026-07-01 BAW2X - Jul 1, 23:55 UTCJul 2, 09:30 UTC9h 35m
2026-07-01 BAW5L LHR → SFO Jul 1, 10:25 UTCJul 1, 20:25 UTC10h 0m
2026-06-30 BAW6R - Jun 30, 21:25 UTCJul 1, 05:30 UTC8h 5m
2026-06-30 BAW3G LHR → BOS Jun 30, 09:25 UTCJun 30, 18:20 UTC8h 55m
2026-06-29 BAW56 JNB → LHR Jun 29, 18:44 UTCJun 30, 04:50 UTC10h 6m
2026-06-28 BAW57K LHR → JNB Jun 28, 21:34 UTCJun 29, 07:50 UTC10h 15m
2026-06-28 BAW8K DFW → LHR Jun 28, 01:40 UTCJun 28, 09:55 UTC8h 15m
2026-06-27 BAW193 - Jun 27, 12:50 UTCJun 27, 21:55 UTC9h 5m
2026-06-26 BAW54 - Jun 26, 19:35 UTCJun 27, 06:15 UTC10h 40m
2026-06-25 BAW55G LHR → JNB Jun 25, 18:34 UTCJun 26, 04:55 UTC10h 20m
2026-06-25 BAW4E - Jun 25, 04:40 UTCJun 25, 14:24 UTC9h 45m
2026-06-24 BAW7D EWR → LHR Jun 24, 15:29 UTCJun 25, 01:50 UTC10h 20m
2026-06-24 BAW2X - Jun 24, 08:09 UTCJun 24, 09:29 UTC1h 20m
2026-06-23 BAW2X - Jun 23, 23:50 UTCJun 24, 04:44 UTC4h 55m
2026-06-23 BAW5L LHR → SFO Jun 23, 10:29 UTCJun 23, 20:49 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-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 BAW57K, BAW56, BAW5E, BAW213, BAW212.