Apparatus

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sensors Mode-S transponder

40688D

ICAO 24-bit transponder address · allocated to United Kingdom

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

Hex
40688D
Octal
20064215
Decimal
4,221,069
Country
GB
Tail
G-XLEC
Type
A388
Broadcasting now · callsign BAW5L · 40,025 ft
Flights observed
131
Distinct callsigns
17
Country
GB
Last broadcast
39m ago

Current position

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

Country allocation

The ICAO 24-bit address 40688D 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
BAW6R British Airways 16 2026-07-22
BAW3G - 14 2026-07-22
BAW5L British Airways 13 2026-07-25
BAW2X - 12 2026-07-19
BAW56 British Airways 10 2026-07-24
BAW7D - 9 2026-07-14
BAW57K British Airways 9 2026-07-23
BAW4E - 8 2026-07-15
BAW213 - 8 2026-07-08
BAW212 - 8 2026-07-09
BAW55G - 7 2026-07-11
BAW54 - 6 2026-07-12
BAW8K British Airways 3 2026-06-12
BAW193 British Airways 3 2026-06-11
BAW5E British Airways 2 2026-05-20
BAW34N British Airways 2 2026-05-21
BAW9174 British Airways 1 2026-04-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 BAW5L LHR → SFO Jul 25, 11:10 UTCJul 25, 19:15 UTC8h 5m
2026-07-24 BAW56 JNB → LHR Jul 24, 17:50 UTCJul 25, 04:20 UTC10h 30m
2026-07-23 BAW57K LHR → JNB Jul 23, 21:05 UTCJul 24, 07:20 UTC10h 15m
2026-07-22 BAW6R MIA → LHR Jul 22, 21:20 UTCJul 23, 05:25 UTC8h 5m
2026-07-22 BAW3G - Jul 22, 10:20 UTCJul 22, 18:20 UTC8h 0m
2026-07-22 BAW6R MIA → LHR Jul 22, 04:25 UTCJul 22, 05:25 UTC1h 0m
2026-07-21 BAW6R MIA → LHR Jul 21, 21:35 UTCJul 22, 00:55 UTC3h 20m
2026-07-21 BAW3G - Jul 21, 10:55 UTCJul 21, 19:05 UTC8h 10m
2026-07-20 BAW56 - Jul 20, 20:15 UTCJul 21, 06:30 UTC10h 15m
2026-07-19 BAW57K - Jul 19, 20:50 UTCJul 20, 07:15 UTC10h 25m
2026-07-19 BAW2X - Jul 19, 02:45 UTCJul 19, 12:15 UTC9h 30m
2026-07-18 BAW5L LHR → SFO Jul 18, 13:25 UTCJul 18, 23:40 UTC10h 15m
2026-07-17 BAW6R MIA → LHR Jul 17, 22:40 UTCJul 18, 06:55 UTC8h 16m
2026-07-17 BAW3G - Jul 17, 09:35 UTCJul 17, 18:15 UTC8h 40m
2026-07-16 BAW56 - Jul 16, 17:49 UTCJul 17, 04:14 UTC10h 25m
2026-07-15 BAW57K - Jul 15, 21:20 UTCJul 16, 07:25 UTC10h 5m
2026-07-15 BAW4E - Jul 15, 04:15 UTCJul 15, 14:20 UTC10h 5m
2026-07-14 BAW7D - Jul 14, 14:40 UTCJul 15, 01:05 UTC10h 24m
2026-07-13 BAW2X SFO → LHR Jul 13, 23:50 UTCJul 14, 09:30 UTC9h 40m
2026-07-13 BAW5L - Jul 13, 10:40 UTCJul 13, 21:10 UTC10h 30m
2026-07-12 BAW54 GCJ → LHR Jul 12, 19:35 UTCJul 13, 06:15 UTC10h 40m
2026-07-11 BAW55G - Jul 11, 19:40 UTCJul 12, 05:40 UTC10h 0m
2026-07-11 BAW4E - Jul 11, 04:35 UTCJul 11, 14:35 UTC10h 0m
2026-07-10 BAW7D LHR → LAX Jul 10, 14:35 UTCJul 11, 01:00 UTC10h 25m
2026-07-10 BAW2X - Jul 10, 00:05 UTCJul 10, 10:05 UTC10h 0m
2026-07-09 BAW5L LHR → SFO Jul 9, 10:35 UTCJul 9, 21:00 UTC10h 25m
2026-07-09 BAW212 BOS → LHR Jul 9, 00:05 UTCJul 9, 06:15 UTC6h 10m
2026-07-08 BAW213 - Jul 8, 14:25 UTCJul 8, 21:00 UTC6h 35m
2026-07-07 BAW54 - Jul 7, 19:40 UTCJul 8, 06:10 UTC10h 30m
2026-07-06 BAW55G LHR → JNB Jul 6, 18:15 UTCJul 7, 04:25 UTC10h 10m
2026-07-06 BAW4E - Jul 6, 04:30 UTCJul 6, 14:25 UTC9h 55m
2026-07-05 BAW7D EWR → LHR Jul 5, 21:45 UTCJul 6, 01:30 UTC3h 45m
2026-07-05 BAW7D EWR → LHR Jul 5, 14:45 UTCJul 5, 15:55 UTC1h 10m
2026-07-05 BAW2X SFO → LHR Jul 5, 00:05 UTCJul 5, 09:50 UTC9h 45m
2026-07-04 BAW5L LHR → SFO Jul 4, 10:45 UTCJul 4, 21:15 UTC10h 30m
2026-07-04 BAW212 BOS → LHR Jul 4, 00:15 UTCJul 4, 05:50 UTC5h 35m
2026-07-03 BAW213 LHR → BOS Jul 3, 13:55 UTCJul 3, 20:50 UTC6h 55m
2026-06-30 BAW212 BOS → LHR Jun 30, 23:50 UTCJul 1, 05:45 UTC5h 55m
2026-06-30 BAW213 LHR → BOS Jun 30, 14:10 UTCJun 30, 20:50 UTC6h 40m
2026-06-30 BAW2X SFO → LHR Jun 30, 00:20 UTCJun 30, 10:00 UTC9h 41m
2026-06-29 BAW5L LHR → SFO Jun 29, 10:15 UTCJun 29, 20:04 UTC9h 50m
2026-06-27 BAW4E - Jun 27, 04:39 UTCJun 27, 14:35 UTC9h 55m
2026-06-26 BAW7D EWR → LHR Jun 26, 15:25 UTCJun 27, 01:49 UTC10h 25m
2026-06-26 BAW2X - Jun 26, 00:10 UTCJun 26, 09:50 UTC9h 40m
2026-06-25 BAW5L LHR → SFO Jun 25, 10:35 UTCJun 25, 20:34 UTC10h 0m
2026-06-24 BAW6R - Jun 24, 21:34 UTCJun 25, 05:20 UTC7h 45m
2026-06-24 BAW3G LHR → BOS Jun 24, 09:49 UTCJun 24, 19:00 UTC9h 10m
2026-06-23 BAW6R - Jun 23, 21:24 UTCJun 24, 05:29 UTC8h 5m
2026-06-23 BAW3G LHR → BOS Jun 23, 09:45 UTCJun 23, 18:34 UTC8h 50m
2026-06-20 BAW212 BOS → LHR Jun 20, 00:44 UTCJun 20, 06:29 UTC5h 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-XLEC page for operator, model, and routing details .

Mode-S 40688D frequently asked

What is Mode-S code 40688D?
40688D is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-XLEC.
Where is Mode-S 40688D registered?
Mode-S code 40688D 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 40688D broadcasting right now?
Yes. Mode-S 40688D is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 40688D, octal 20064215, decimal 4,221,069.
What flights does 40688D operate?
Mode-S 40688D has broadcast 17 distinct callsigns, including BAW6R, BAW3G, BAW5L, BAW2X, BAW56.