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
No current signal · last broadcast 2h ago
Flights observed
186
Distinct callsigns
20
Country
GB
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 406591.

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
BAW28F - 9 2026-07-11
BAW21B - 9 2026-07-10
BAW15K British Airways 9 2026-06-28
BAW12 - 9 2026-06-24
BAW116 - 9 2026-06-29
BAW11 - 9 2026-06-23
BAW9SW British Airways 8 2026-06-05
BAW82P British Airways 8 2026-06-04
BAW49 - 8 2026-07-12
BAW48Q - 8 2026-07-13
BAW40F - 7 2026-06-30
BAW196E - 7 2026-07-07
BAW173A British Airways 7 2026-06-30
BAW97A - 6 2026-07-06
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
BAW14K - 5 2026-06-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 BAW293 - Jul 14, 17:10 UTCJul 14, 18:20 UTC1h 10m
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
2026-06-28 BAW180 JFK → LHR Jun 28, 00:39 UTCJun 28, 06:44 UTC6h 5m
2026-06-27 BAW04A - Jun 27, 13:00 UTCJun 27, 19:49 UTC6h 50m
2026-06-27 BAW116 JFK → LHR Jun 27, 00:50 UTCJun 27, 06:50 UTC6h 0m
2026-06-26 BAW15K LHR → JFK Jun 26, 14:55 UTCJun 26, 21:59 UTC7h 5m
2026-06-26 BAW196E - Jun 26, 02:50 UTCJun 26, 11:09 UTC8h 20m
2026-06-25 BAW97A - Jun 25, 14:55 UTCJun 26, 00:15 UTC9h 20m
2026-06-24 BAW12 - Jun 24, 15:59 UTCJun 25, 05:15 UTC13h 15m
2026-06-23 BAW11 - Jun 23, 20:44 UTCJun 24, 09:55 UTC13h 10m
2026-06-21 BAW62 EBB → LHR Jun 21, 14:24 UTCJun 21, 16:39 UTC2h 15m
2026-06-21 BAW63 LHR → EBB Jun 21, 05:30 UTCJun 21, 05:44 UTC15m
2026-06-20 BAW63 LHR → EBB Jun 20, 21:14 UTCJun 21, 01:30 UTC4h 15m
2026-06-20 BAW6B SFO → LHR Jun 20, 03:49 UTCJun 20, 13:29 UTC9h 40m
2026-06-19 BAW28K LHR → SFO Jun 19, 15:19 UTCJun 20, 01:24 UTC10h 5m
2026-06-18 BAW6B SFO → LHR Jun 18, 03:05 UTCJun 18, 13:00 UTC9h 55m
2026-06-17 BAW28K LHR → SFO Jun 17, 14:30 UTCJun 18, 00:30 UTC10h 0m
2026-06-17 BAW298 ORD → LHR Jun 17, 01:30 UTCJun 17, 08:35 UTC7h 5m
2026-06-16 BAW299 - Jun 16, 13:44 UTCJun 16, 21:30 UTC7h 46m
2026-06-16 BAW298 - Jun 16, 01:10 UTCJun 16, 08:20 UTC7h 10m
2026-06-15 BAW299 LHR → ORD Jun 15, 13:45 UTCJun 15, 21:30 UTC7h 45m
2026-06-15 BAW14K JFK → LHR Jun 15, 02:35 UTCJun 15, 08:45 UTC6h 10m
2026-06-14 BAW33K LHR → JFK Jun 14, 16:25 UTCJun 14, 23:10 UTC6h 45m
2026-06-14 BAW6B SFO → LHR Jun 14, 03:05 UTCJun 14, 13:00 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-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?
No active broadcast right now. Last signal was 2h ago.
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 BAW28F, BAW21B, BAW15K, BAW12, BAW116.