Apparatus

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sensors Mode-S transponder

406BBB

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-EUYY · AIRBUS A-320

Hex
406BBB
Octal
20065673
Decimal
4,221,883
Country
GB
Tail
G-EUYY
Type
A320
Broadcasting now · callsign SHT16C · 1,375 ft
Flights observed
304
Distinct callsigns
20
Country
GB
Last broadcast
Jul 26, 20:15 UTC

Current position

406BBB is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 406BBB 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 20 distinct

Callsign Airline Flights Last seen
BAW491 British Airways 5 2026-05-26
BAW490 British Airways 5 2026-05-26
BAW475E British Airways 4 2026-07-25
BAW965 - 3 2026-06-16
BAW964H - 3 2026-06-16
BAW7YT British Airways 3 2026-04-25
BAW719 - 3 2026-06-14
BAW718 British Airways 3 2026-06-14
BAW663 British Airways 3 2026-06-07
BAW63VP - 3 2026-06-19
BAW630 British Airways 3 2026-06-19
BAW609 British Airways 3 2026-06-02
BAW608 British Airways 3 2026-06-02
BAW607M British Airways 3 2026-05-17
BAW606 British Airways 3 2026-05-17
BAW474K British Airways 3 2026-07-25
BAW381 British Airways 3 2026-05-18
BAW380 British Airways 3 2026-05-18
BAW379 British Airways 3 2026-07-26
BAW378 British Airways 3 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 BAW43HA AMS → LHR Jul 26, 19:35 UTCJul 26, 20:15 UTC40m
2026-07-26 BAW442K LHR → AMS Jul 26, 17:35 UTCJul 26, 18:15 UTC40m
2026-07-26 BAW575 LIN → LHR Jul 26, 14:30 UTCJul 26, 16:00 UTC1h 30m
2026-07-26 BAW74E LHR → LIN Jul 26, 11:25 UTCJul 26, 12:50 UTC1h 25m
2026-07-26 BAW379 TLS → LHR Jul 26, 06:45 UTCJul 26, 09:50 UTC3h 5m
2026-07-25 BAW378 LHR → TLS Jul 25, 18:45 UTCJul 25, 20:55 UTC2h 10m
2026-07-25 SHT5U - Jul 25, 15:35 UTCJul 25, 16:25 UTC50m
2026-07-25 SHT4D - Jul 25, 13:35 UTCJul 25, 14:30 UTC55m
2026-07-25 BAW475E BCN → LHR Jul 25, 10:15 UTCJul 25, 12:05 UTC1h 50m
2026-07-25 BAW474K LHR → BCN Jul 25, 07:00 UTCJul 25, 08:45 UTC1h 45m
2026-07-24 BAW9272 GLA → OSR Jul 24, 18:20 UTCJul 24, 21:10 UTC2h 50m
2026-07-20 35252 MLA → MLA Jul 20, 10:10 UTCJul 20, 10:25 UTC15m
2026-06-20 BAW9270 LHR → LGW Jun 20, 17:34 UTCJun 20, 20:14 UTC2h 40m
2026-06-20 BAW411 VLC → LHR Jun 20, 12:14 UTCJun 20, 15:49 UTC3h 35m
2026-06-20 BAW41GC LHR → TFS Jun 20, 06:39 UTCJun 20, 10:20 UTC3h 40m
2026-06-19 BAW63VP ATH → LHR Jun 19, 14:49 UTCJun 19, 18:30 UTC3h 40m
2026-06-19 BAW630 LHR → ATH Jun 19, 10:04 UTCJun 19, 13:20 UTC3h 15m
2026-06-19 BAW379 - Jun 19, 05:45 UTCJun 19, 08:24 UTC2h 40m
2026-06-18 BAW378 - Jun 18, 18:30 UTCJun 18, 20:40 UTC2h 10m
2026-06-18 BAW629 ATH → LHR Jun 18, 13:05 UTCJun 18, 16:25 UTC3h 20m
2026-06-18 BAW628 - Jun 18, 08:00 UTCJun 18, 11:15 UTC3h 15m
2026-06-18 SHT9X EDI → LHR Jun 18, 05:15 UTCJun 18, 06:20 UTC1h 5m
2026-06-17 SHT8P - Jun 17, 20:25 UTCJun 17, 21:20 UTC55m
2026-06-17 BAW669R RAK → LHR Jun 17, 15:00 UTCJun 17, 18:45 UTC3h 45m
2026-06-17 BAW668R LHR → RAK Jun 17, 10:10 UTCJun 17, 13:35 UTC3h 25m
2026-06-16 SHT9L - Jun 16, 19:30 UTCJun 16, 20:30 UTC1h 1m
2026-06-16 SHT8K - Jun 16, 16:55 UTCJun 16, 17:45 UTC50m
2026-06-16 BAW965 HAM → LHR Jun 16, 14:00 UTCJun 16, 15:30 UTC1h 30m
2026-06-16 BAW964H LHR → HAM Jun 16, 11:40 UTCJun 16, 12:50 UTC1h 10m
2026-06-16 BAW379 - Jun 16, 06:54 UTCJun 16, 09:40 UTC2h 45m
2026-06-15 BAW378 - Jun 15, 18:45 UTCJun 15, 20:45 UTC2h 0m
2026-06-15 BAW457V MAD → LHR Jun 15, 08:49 UTCJun 15, 10:45 UTC1h 55m
2026-06-15 BAW456 - Jun 15, 05:30 UTCJun 15, 07:25 UTC1h 55m
2026-06-14 BAW719 - Jun 14, 16:20 UTCJun 14, 20:05 UTC3h 45m
2026-06-14 BAW718 LHR → ZRH Jun 14, 11:10 UTCJun 14, 14:35 UTC3h 25m
2026-06-14 BAW721 - Jun 14, 05:55 UTCJun 14, 09:35 UTC3h 40m
2026-06-13 BAW720 LHR → ZRH Jun 13, 18:00 UTCJun 13, 21:05 UTC3h 5m
2026-06-13 BAW331 CDG → LHR Jun 13, 15:05 UTCJun 13, 16:50 UTC1h 45m
2026-06-13 BAW330U LHR → TBS Jun 13, 11:55 UTCJun 13, 13:25 UTC1h 30m
2026-06-13 BAW779C ARN → LHR Jun 13, 07:05 UTCJun 13, 09:30 UTC2h 25m
2026-06-12 BAW778F LHR → ARN Jun 12, 20:05 UTCJun 12, 22:00 UTC1h 55m
2026-06-12 BAW63VP ATH → LHR Jun 12, 14:40 UTCJun 12, 18:45 UTC4h 5m
2026-06-12 BAW630 LHR → ATH Jun 12, 10:15 UTCJun 12, 13:20 UTC3h 5m
2026-06-12 SHT3T MAN → LHR Jun 12, 07:10 UTCJun 12, 07:55 UTC45m
2026-06-11 SHT2B LHR → MAN Jun 11, 20:50 UTCJun 11, 21:30 UTC40m
2026-06-11 BAW907 FRA → LHR Jun 11, 18:00 UTCJun 11, 19:20 UTC1h 20m
2026-06-11 BAW906 LHR → FRA Jun 11, 15:30 UTCJun 11, 16:35 UTC1h 5m
2026-06-11 SHT7T GLA → LHR Jun 11, 12:35 UTCJun 11, 13:40 UTC1h 5m
2026-06-11 SHT6L - Jun 11, 10:35 UTCJun 11, 11:40 UTC1h 5m
2026-06-11 BAW639 ATH → LHR Jun 11, 04:45 UTCJun 11, 08:40 UTC3h 55m

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

Mode-S 406BBB frequently asked

What is Mode-S code 406BBB?
406BBB is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-EUYY.
Where is Mode-S 406BBB registered?
Mode-S code 406BBB 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 406BBB broadcasting right now?
Yes. Mode-S 406BBB is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 406BBB, octal 20065673, decimal 4,221,883.
What flights does 406BBB operate?
Mode-S 406BBB has broadcast 20 distinct callsigns, including BAW491, BAW490, BAW475E, BAW965, BAW964H.