Apparatus

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sensors Mode-S transponder

406591

ICAO 24-bit transponder address · allocated to United Kingdom

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

Hex
406591
Octal
20062621
Decimal
4,220,305
Country
GB
Tail
G-STBE
Type
B77W
Broadcasting now · callsign BAW49 · 38,000 ft
Flights observed
208
Distinct callsigns
20
Country
GB
Last broadcast
Jul 26, 20:45 UTC

Current position

406591 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 406591 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
BAW196E British Airways 10 2026-07-22
BAW12 British Airways 10 2026-07-25
BAW11 British Airways 10 2026-07-24
BAW9SW British Airways 9 2026-07-24
BAW97A British Airways 9 2026-07-21
BAW82P British Airways 9 2026-07-23
BAW49 - 9 2026-07-20
BAW48Q British Airways 9 2026-07-21
BAW28F - 9 2026-07-11
BAW21B - 9 2026-07-10
BAW15K British Airways 9 2026-06-28
BAW116 - 9 2026-06-29
BAW40F British Airways 8 2026-07-19
BAW173A - 8 2026-07-19
BAW6B British Airways 6 2026-07-03
BAW33K British Airways 6 2026-06-14
BAW28K British Airways 6 2026-07-02
BAW1269 British Airways 6 2026-04-15
BAW4E British Airways 5 2026-04-16
BAW29C - 5 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 BAW283 LHR → LAX Jul 26, 10:00 UTCJul 26, 20:45 UTC10h 45m
2026-07-25 BAW12 SIN → LHR Jul 25, 15:45 UTCJul 26, 05:15 UTC13h 30m
2026-07-24 BAW11 LHR → SIN Jul 24, 19:05 UTCJul 25, 08:00 UTC12h 55m
2026-07-24 BAW9SW SAN → LHR Jul 24, 03:10 UTCJul 24, 12:45 UTC9h 35m
2026-07-23 BAW82P LHR → SAN Jul 23, 14:15 UTCJul 24, 01:05 UTC10h 50m
2026-07-23 BAW6AC ORD → LHR Jul 23, 02:55 UTCJul 23, 10:05 UTC7h 10m
2026-07-22 BAW7CP LHR → ORD Jul 22, 15:55 UTCJul 22, 23:45 UTC7h 50m
2026-07-22 BAW196E IAH → LHR Jul 22, 03:30 UTCJul 22, 12:00 UTC8h 30m
2026-07-21 BAW97A LHR → IAH Jul 21, 15:35 UTCJul 22, 01:20 UTC9h 45m
2026-07-21 BAW48Q SEA → LHR Jul 21, 03:50 UTCJul 21, 12:25 UTC8h 35m
2026-07-20 BAW49 - Jul 20, 15:55 UTCJul 21, 01:30 UTC9h 34m
2026-07-19 BAW40F JFK → LHR Jul 19, 23:15 UTCJul 20, 05:30 UTC6h 15m
2026-07-19 BAW173A LHR → JFK Jul 19, 12:45 UTCJul 19, 19:30 UTC6h 45m
2026-07-19 BAW180 JFK → LHR Jul 19, 03:30 UTCJul 19, 09:55 UTC6h 25m
2026-07-18 BAW04A LHR → JFK Jul 18, 12:55 UTCJul 18, 20:00 UTC7h 5m
2026-07-18 BAW29C IAD → LHR Jul 18, 02:50 UTCJul 18, 09:50 UTC7h 0m
2026-07-17 BAW293 LHR → IAD Jul 17, 16:29 UTCJul 17, 23:39 UTC7h 10m
2026-07-17 BAW196E - Jul 17, 02:39 UTCJul 17, 11:30 UTC8h 50m
2026-07-16 BAW97A - Jul 16, 14:25 UTCJul 16, 23:55 UTC9h 30m
2026-07-16 BAW196E - Jul 16, 02:20 UTCJul 16, 11:20 UTC9h 0m
2026-07-15 BAW97A - Jul 15, 14:25 UTCJul 15, 23:50 UTC9h 25m
2026-07-15 BAW29C IAD → LHR Jul 15, 02:45 UTCJul 15, 09:45 UTC7h 0m
2026-07-14 BAW293 - Jul 14, 17:10 UTCJul 15, 00:15 UTC7h 4m
2026-07-14 BAW134 - Jul 14, 05:05 UTCJul 14, 14:20 UTC9h 15m
2026-07-14 BAW135 - Jul 14, 02:30 UTCJul 14, 02:45 UTC15m
2026-07-13 BAW135 - Jul 13, 18:15 UTCJul 14, 01:40 UTC7h 25m
2026-07-13 BAW48Q SEA → LHR Jul 13, 04:45 UTCJul 13, 13:20 UTC8h 35m
2026-07-12 BAW49 LHR → SEA Jul 12, 16:15 UTCJul 13, 01:55 UTC9h 40m
2026-07-12 BAW134 - Jul 12, 04:15 UTCJul 12, 13:30 UTC9h 15m
2026-07-11 BAW135 LHR → BOM Jul 11, 17:20 UTCJul 12, 01:35 UTC8h 15m
2026-07-11 BAW28F - Jul 11, 04:30 UTCJul 11, 14:15 UTC9h 45m
2026-07-10 BAW21B - Jul 10, 15:10 UTCJul 11, 01:40 UTC10h 30m
2026-07-07 BAW196E - Jul 7, 03:20 UTCJul 7, 12:00 UTC8h 40m
2026-07-06 BAW97A - Jul 6, 15:30 UTCJul 7, 00:40 UTC9h 10m
2026-07-06 BAW48Q SEA → LHR Jul 6, 04:00 UTCJul 6, 12:45 UTC8h 45m
2026-07-05 BAW49 - Jul 5, 16:00 UTCJul 6, 01:20 UTC9h 20m
2026-07-05 BAW48Q SEA → LHR Jul 5, 04:20 UTCJul 5, 12:55 UTC8h 35m
2026-07-04 BAW49 - Jul 4, 15:55 UTCJul 5, 01:25 UTC9h 30m
2026-07-04 BAW48Q SEA → LHR Jul 4, 03:55 UTCJul 4, 12:45 UTC8h 50m
2026-07-03 BAW49 - Jul 3, 16:00 UTCJul 4, 01:25 UTC9h 25m
2026-07-03 BAW6B SFO → LHR Jul 3, 02:40 UTCJul 3, 11:55 UTC9h 15m
2026-07-02 BAW28K LHR → SFO Jul 2, 14:00 UTCJul 3, 00:15 UTC10h 15m
2026-07-02 BAW28F - Jul 2, 00:30 UTCJul 2, 09:50 UTC9h 20m
2026-07-01 BAW21B - Jul 1, 11:05 UTCJul 1, 21:30 UTC10h 25m
2026-06-30 BAW40F - Jun 30, 23:00 UTCJul 1, 05:15 UTC6h 15m
2026-06-30 BAW173A LHR → JFK Jun 30, 11:20 UTCJun 30, 18:15 UTC6h 55m
2026-06-29 BAW40F JFK → LHR Jun 29, 23:34 UTCJun 30, 05:40 UTC6h 6m
2026-06-29 BAW173A LHR → JFK Jun 29, 11:04 UTCJun 29, 17:59 UTC6h 55m
2026-06-29 BAW116 JFK → LHR Jun 29, 01:05 UTCJun 29, 06:59 UTC5h 55m
2026-06-28 BAW15K LHR → JFK Jun 28, 15:09 UTCJun 28, 22:04 UTC6h 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-STBE page for operator, model, and routing details .

Mode-S 406591 frequently asked

What is Mode-S code 406591?
406591 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-STBE.
Where is Mode-S 406591 registered?
Mode-S code 406591 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 406591 broadcasting right now?
Yes. Mode-S 406591 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 406591, octal 20062621, decimal 4,220,305.
What flights does 406591 operate?
Mode-S 406591 has broadcast 20 distinct callsigns, including BAW196E, BAW12, BAW11, BAW9SW, BAW97A.