sensors Mode-S transponder

406B20

ICAO 24-bit transponder address · allocated to United Kingdom

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

Hex
406B20
Octal
20065440
Decimal
4,221,728
Country
GB
Tail
G-XLEG
Type
A388
No current signal · last broadcast 8d ago
Flights observed
106
Distinct callsigns
17
Country
GB
Last broadcast
8d ago

Last known position

Most recent position reported by Mode-S 406B20.

Country allocation

The ICAO 24-bit address 406B20 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
BAW5L British Airways 11 2026-06-24
BAW212 - 10 2026-06-15
BAW54 - 9 2026-06-30
BAW2X - 8 2026-06-24
BAW213 British Airways 8 2026-06-14
BAW7D British Airways 7 2026-07-03
BAW5E British Airways 7 2026-05-05
BAW55G British Airways 7 2026-06-29
BAW4E - 7 2026-07-04
BAW34N British Airways 7 2026-05-06
BAW57K British Airways 6 2026-06-12
BAW6R - 5 2026-07-03
BAW3G British Airways 5 2026-07-02
BAW56 British Airways 4 2026-06-13
BAW8K - 2 2026-06-29
BAW193 - 2 2026-06-28
BAW9170 British Airways 1 2026-07-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-05 BAW9170 CWL → LHR Jul 5, 07:05 UTCJul 5, 21:35 UTC14h 30m
2026-07-04 BAW4E - Jul 4, 04:10 UTCJul 4, 13:55 UTC9h 45m
2026-07-03 BAW7D EWR → LHR Jul 3, 14:30 UTCJul 4, 01:10 UTC10h 40m
2026-07-03 BAW6R - Jul 3, 00:05 UTCJul 3, 08:05 UTC8h 0m
2026-07-02 BAW3G LHR → BOS Jul 2, 12:15 UTCJul 2, 21:05 UTC8h 50m
2026-07-01 BAW6R - Jul 1, 22:00 UTCJul 2, 06:00 UTC8h 0m
2026-07-01 BAW3G LHR → BOS Jul 1, 09:30 UTCJul 1, 18:20 UTC8h 50m
2026-06-30 BAW54 - Jun 30, 19:30 UTCJul 1, 06:05 UTC10h 35m
2026-06-29 BAW55G LHR → JNB Jun 29, 18:25 UTCJun 30, 04:50 UTC10h 26m
2026-06-29 BAW8K DFW → LHR Jun 29, 01:34 UTCJun 29, 10:04 UTC8h 30m
2026-06-28 BAW193 - Jun 28, 12:50 UTCJun 28, 21:59 UTC9h 10m
2026-06-26 BAW4E - Jun 26, 04:24 UTCJun 26, 14:19 UTC9h 55m
2026-06-25 BAW7D EWR → LHR Jun 25, 14:39 UTCJun 26, 01:05 UTC10h 25m
2026-06-24 BAW2X - Jun 24, 23:54 UTCJun 25, 09:45 UTC9h 50m
2026-06-24 BAW5L LHR → SFO Jun 24, 10:35 UTCJun 24, 20:44 UTC10h 10m
2026-06-23 BAW54 - Jun 23, 19:29 UTCJun 24, 06:04 UTC10h 35m
2026-06-22 BAW55G LHR → JNB Jun 22, 18:40 UTCJun 23, 05:15 UTC10h 35m
2026-06-22 BAW8K DFW → LHR Jun 22, 01:10 UTCJun 22, 09:40 UTC8h 30m
2026-06-21 BAW193 - Jun 21, 12:35 UTCJun 21, 21:54 UTC9h 20m
2026-06-20 BAW54 - Jun 20, 19:34 UTCJun 21, 06:14 UTC10h 40m
2026-06-19 BAW55G LHR → JNB Jun 19, 18:34 UTCJun 20, 04:49 UTC10h 15m
2026-06-19 BAW4E - Jun 19, 04:14 UTCJun 19, 14:04 UTC9h 50m
2026-06-18 BAW7D EWR → LHR Jun 18, 14:40 UTCJun 19, 01:04 UTC10h 24m
2026-06-15 BAW212 BOS → LHR Jun 15, 00:15 UTCJun 15, 05:55 UTC5h 40m
2026-06-14 BAW213 LHR → BOS Jun 14, 15:05 UTCJun 14, 21:20 UTC6h 15m
2026-06-13 BAW56 JNB → LHR Jun 13, 17:45 UTCJun 14, 04:05 UTC10h 20m
2026-06-12 BAW57K LHR → JNB Jun 12, 20:50 UTCJun 13, 07:00 UTC10h 9m
2026-06-11 BAW6R - Jun 11, 21:50 UTCJun 12, 05:45 UTC7h 56m
2026-06-11 BAW3G LHR → BOS Jun 11, 10:15 UTCJun 11, 19:10 UTC8h 55m
2026-06-04 BAW6R MIA → LHR Jun 4, 21:30 UTCJun 5, 05:20 UTC7h 50m
2026-06-04 BAW3G LHR → BOS Jun 4, 09:30 UTCJun 4, 18:25 UTC8h 55m
2026-06-03 BAW54 JNB → LHR Jun 3, 19:25 UTCJun 4, 06:20 UTC10h 55m
2026-06-02 BAW57K LHR → JNB Jun 2, 21:40 UTCJun 3, 07:25 UTC9h 45m
2026-06-01 BAW4E LAX → LHR Jun 1, 04:20 UTCJun 1, 14:20 UTC10h 0m
2026-05-31 BAW7D EWR → LHR May 31, 14:50 UTCJun 1, 01:05 UTC10h 15m
2026-05-30 BAW54 JNB → LHR May 30, 19:35 UTCMay 30, 20:00 UTC25m
2026-05-29 BAW55G LHR → JNB May 29, 18:35 UTCMay 30, 04:40 UTC10h 5m
2026-05-28 BAW2X SFO → LHR May 28, 23:55 UTCMay 29, 10:00 UTC10h 5m
2026-05-28 BAW5L LHR → SFO May 28, 10:25 UTCMay 28, 20:35 UTC10h 10m
2026-05-27 BAW54 JNB → LHR May 27, 19:40 UTCMay 28, 06:15 UTC10h 35m
2026-05-26 BAW57K LHR → JNB May 26, 21:00 UTCMay 27, 07:15 UTC10h 16m
2026-05-26 BAW4E LAX → LHR May 26, 04:54 UTCMay 26, 14:35 UTC9h 40m
2026-05-25 BAW7D EWR → LHR May 25, 15:35 UTCMay 26, 02:10 UTC10h 35m
2026-05-24 BAW4E LAX → LHR May 24, 04:25 UTCMay 24, 14:25 UTC10h 0m
2026-05-23 BAW7D EWR → LHR May 23, 15:15 UTCMay 24, 01:40 UTC10h 26m
2026-05-22 BAW2X SFO → LHR May 22, 23:55 UTCMay 23, 09:40 UTC9h 44m
2026-05-22 BAW5L LHR → SFO May 22, 10:20 UTCMay 22, 20:25 UTC10h 5m
2026-05-22 BAW212 BOS → LHR May 22, 00:30 UTCMay 22, 06:15 UTC5h 45m
2026-05-21 BAW213 LHR → BOS May 21, 14:10 UTCMay 21, 20:45 UTC6h 35m
2026-05-21 BAW2X SFO → LHR May 21, 00:20 UTCMay 21, 10:00 UTC9h 40m

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

Mode-S 406B20 frequently asked

What is Mode-S code 406B20?
406B20 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-XLEG.
Where is Mode-S 406B20 registered?
Mode-S code 406B20 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 406B20 broadcasting right now?
No active broadcast right now. Last signal was 8d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 406B20, octal 20065440, decimal 4,221,728.
What flights does 406B20 operate?
Mode-S 406B20 has broadcast 17 distinct callsigns, including BAW5L, BAW212, BAW54, BAW2X, BAW213.