Apparatus

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sensors Mode-S transponder

406590

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-STBD · BOEING 777-300ER

Hex
406590
Octal
20062620
Decimal
4,220,304
Country
GB
Tail
G-STBD
Type
B77W
Broadcasting now · callsign BAW04A · 14,275 ft
Flights observed
67
Distinct callsigns
20
Country
GB
Last broadcast
1h ago

Current position

406590 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 406590 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
BAW283 British Airways 5 2026-05-25
BAW8DS British Airways 4 2026-05-25
BAW49 British Airways 4 2026-05-27
BAW48Q British Airways 4 2026-05-28
BAW299 British Airways 4 2026-04-17
BAW298 British Airways 4 2026-04-18
BAW28F British Airways 4 2026-05-31
BAW21B British Airways 4 2026-05-30
BAW116 British Airways 4 2026-05-13
BAW97A British Airways 3 2026-05-16
BAW6B British Airways 3 2026-05-27
BAW33K British Airways 3 2026-05-28
BAW28K British Airways 3 2026-05-26
BAW196E British Airways 3 2026-05-17
BAW15K British Airways 3 2026-05-12
BAW14K British Airways 2 2026-05-29
BAW04A British Airways 2 2026-06-02
BAW9SW British Airways 1 2026-06-01
BAW9606 British Airways 1 2026-05-22
BAW82P British Airways 1 2026-05-31

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 BAW04A JFK → LHR Jun 2, 12:55 UTCJun 2, 18:00 UTC5h 5m
2026-06-02 BAW29C IAD → LHR Jun 2, 02:40 UTCJun 2, 09:15 UTC6h 35m
2026-06-01 BAW293 LHR → IAD Jun 1, 16:30 UTCJun 1, 23:45 UTC7h 15m
2026-06-01 BAW9SW SAN → LHR Jun 1, 02:50 UTCJun 1, 12:55 UTC10h 5m
2026-05-31 BAW82P LHR → SAN May 31, 14:20 UTCJun 1, 00:40 UTC10h 20m
2026-05-31 BAW28F LAX → LHR May 31, 00:25 UTCMay 31, 10:55 UTC10h 30m
2026-05-30 BAW21B LHR → LAX May 30, 11:10 UTCMay 30, 21:15 UTC10h 5m
2026-05-29 BAW180 EWR → LHR May 29, 23:50 UTCMay 30, 06:10 UTC6h 20m
2026-05-29 BAW04A JFK → LHR May 29, 12:50 UTCMay 29, 19:50 UTC7h 0m
2026-05-29 BAW14K JFK → LHR May 29, 02:25 UTCMay 29, 08:50 UTC6h 25m
2026-05-28 BAW33K LHR → JFK May 28, 16:50 UTCMay 28, 23:40 UTC6h 50m
2026-05-28 BAW48Q SEA → LHR May 28, 04:00 UTCMay 28, 13:10 UTC9h 10m
2026-05-27 BAW49 LHR → SEA May 27, 16:15 UTCMay 28, 01:35 UTC9h 20m
2026-05-27 BAW6B SFO → LHR May 27, 03:04 UTCMay 27, 12:45 UTC9h 40m
2026-05-26 BAW28K LHR → SFO May 26, 14:30 UTCMay 27, 00:49 UTC10h 20m
2026-05-25 BAW8DS LAX → LHR May 25, 23:00 UTCMay 26, 09:09 UTC10h 10m
2026-05-25 BAW283 LHR → LAX May 25, 10:00 UTCMay 25, 20:34 UTC10h 34m
2026-05-24 BAW12 SIN → LHR May 24, 16:05 UTCMay 25, 05:35 UTC13h 30m
2026-05-23 BAW11 LHR → SIN May 23, 18:55 UTCMay 24, 07:45 UTC12h 50m
2026-05-23 BAW6B SFO → LHR May 23, 02:50 UTCMay 23, 12:40 UTC9h 50m
2026-05-22 BAW28K LHR → SFO May 22, 14:15 UTCMay 23, 00:20 UTC10h 5m
2026-05-22 BAW9606 MCO → LGW May 22, 01:05 UTCMay 22, 06:55 UTC5h 50m
2026-05-20 BAW33K LHR → JFK May 20, 16:10 UTCMay 21, 00:55 UTC8h 45m
2026-05-20 BAW48Q SEA → LHR May 20, 03:55 UTCMay 20, 12:45 UTC8h 51m
2026-05-19 BAW49 LHR → SEA May 19, 16:10 UTCMay 20, 01:10 UTC9h 0m
2026-05-19 BAW48Q SEA → LHR May 19, 03:40 UTCMay 19, 12:35 UTC8h 55m
2026-05-18 BAW49 LHR → SEA May 18, 16:00 UTCMay 19, 01:10 UTC9h 9m
2026-05-18 BAW48Q SEA → LHR May 18, 03:45 UTCMay 18, 12:35 UTC8h 50m
2026-05-17 BAW49 LHR → SEA May 17, 16:05 UTCMay 18, 01:00 UTC8h 55m
2026-05-17 BAW196E IAH → LHR May 17, 02:40 UTCMay 17, 11:01 UTC8h 20m
2026-05-16 BAW97A LHR → IAH May 16, 14:31 UTCMay 17, 00:10 UTC9h 40m
2026-05-16 BAW14K JFK → LHR May 16, 02:05 UTCMay 16, 08:20 UTC6h 16m
2026-05-15 BAW33K LHR → JFK May 15, 16:15 UTCMay 15, 23:15 UTC7h 0m
2026-05-15 BAW6B SFO → LHR May 15, 03:30 UTCMay 15, 12:50 UTC9h 20m
2026-05-14 BAW28K LHR → SFO May 14, 14:20 UTCMay 15, 01:00 UTC10h 40m
2026-05-14 BAW28F LAX → LHR May 14, 01:35 UTCMay 14, 10:55 UTC9h 20m
2026-05-13 BAW21B LHR → LAX May 13, 12:05 UTCMay 13, 22:55 UTC10h 50m
2026-05-13 BAW116 JFK → LHR May 13, 00:50 UTCMay 13, 07:30 UTC6h 40m
2026-05-12 BAW15K LHR → JFK May 12, 14:50 UTCMay 12, 21:55 UTC7h 5m
2026-05-12 BAW196E IAH → LHR May 12, 02:45 UTCMay 12, 11:05 UTC8h 20m
2026-05-11 BAW97A LHR → IAH May 11, 14:30 UTCMay 11, 22:35 UTC8h 5m
2026-05-11 BAW28F LAX → LHR May 11, 00:15 UTCMay 11, 10:10 UTC9h 55m
2026-05-10 BAW21B LHR → LAX May 10, 11:10 UTCMay 10, 21:25 UTC10h 15m
2026-04-22 BAW116 JFK → LHR Apr 22, 05:55 UTCApr 22, 07:30 UTC1h 35m
2026-04-22 BAW116 JFK → LHR Apr 22, 00:50 UTCApr 22, 02:15 UTC1h 25m
2026-04-21 BAW15K LHR → JFK Apr 21, 14:40 UTCApr 21, 21:35 UTC6h 55m
2026-04-21 BAW116 JFK → LHR Apr 21, 01:00 UTCApr 21, 07:35 UTC6h 35m
2026-04-20 BAW15K LHR → JFK Apr 20, 14:55 UTCApr 20, 21:55 UTC7h 0m
2026-04-20 BAW196E IAH → LHR Apr 20, 02:35 UTCApr 20, 11:05 UTC8h 30m
2026-04-19 BAW97A LHR → IAH Apr 19, 14:25 UTCApr 20, 00:20 UTC9h 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-STBD page for operator, model, and routing details .

Mode-S 406590 frequently asked

What is Mode-S code 406590?
406590 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-STBD.
Where is Mode-S 406590 registered?
Mode-S code 406590 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 406590 broadcasting right now?
Yes. Mode-S 406590 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 406590, octal 20062620, decimal 4,220,304.
What flights does 406590 operate?
Mode-S 406590 has broadcast 20 distinct callsigns, including BAW283, BAW8DS, BAW49, BAW48Q, BAW299.