Apparatus

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sensors Mode-S transponder

406A35

ICAO 24-bit transponder address · allocated to United Kingdom

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

Hex
406A35
Octal
20065065
Decimal
4,221,493
Country
GB
Tail
G-STBJ
Type
B77W
No current signal · last broadcast Jul 26, 21:15 UTC
Flights observed
224
Distinct callsigns
20
Country
GB
Last broadcast
Jul 26, 21:15 UTC

Last known position

Most recent position reported by Mode-S 406A35.

Country allocation

The ICAO 24-bit address 406A35 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
BAW97A British Airways 19 2026-07-26
BAW196E British Airways 17 2026-07-23
BAW173A British Airways 14 2026-07-01
BAW40F - 12 2026-07-01
BAW28F British Airways 11 2026-07-26
BAW283 - 11 2026-07-21
BAW21B British Airways 11 2026-07-25
BAW293 - 10 2026-06-28
BAW8DS British Airways 9 2026-07-21
BAW29C - 9 2026-06-29
BAW49 - 8 2026-07-10
BAW180 - 7 2026-07-16
BAW15K British Airways 7 2026-07-23
BAW11J British Airways 7 2026-07-24
BAW116 British Airways 7 2026-07-24
BAW04A - 7 2026-07-16
BAW48Q - 6 2026-07-11
BAW33K - 6 2026-07-13
BAW14K - 6 2026-07-14
BAW181 British Airways 4 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 BAW97A LHR → IAH Jul 26, 14:30 UTCJul 26, 21:15 UTC6h 45m
2026-07-26 BAW28F LAX → LHR Jul 26, 00:30 UTCJul 26, 09:50 UTC9h 21m
2026-07-25 BAW21B LHR → LAX Jul 25, 11:10 UTCJul 25, 21:55 UTC10h 45m
2026-07-24 BAW11J JFK → LHR Jul 24, 23:35 UTCJul 25, 05:40 UTC6h 5m
2026-07-24 BAW181 LHR → EWR Jul 24, 12:05 UTCJul 24, 18:50 UTC6h 45m
2026-07-24 BAW116 JFK → LHR Jul 24, 01:00 UTCJul 24, 07:15 UTC6h 15m
2026-07-23 BAW15K LHR → JFK Jul 23, 15:15 UTCJul 23, 22:00 UTC6h 45m
2026-07-23 BAW196E IAH → LHR Jul 23, 02:30 UTCJul 23, 11:00 UTC8h 30m
2026-07-22 BAW97A LHR → IAH Jul 22, 14:35 UTCJul 23, 00:05 UTC9h 30m
2026-07-21 BAW8DS LAX → LHR Jul 21, 23:25 UTCJul 22, 02:35 UTC3h 10m
2026-07-21 BAW283 - Jul 21, 10:10 UTCJul 21, 20:40 UTC10h 30m
2026-07-20 BAW12 SIN → LHR Jul 20, 15:55 UTCJul 21, 05:05 UTC13h 9m
2026-07-19 BAW11 LHR → SIN Jul 19, 19:10 UTCJul 20, 07:45 UTC12h 35m
2026-07-19 BAW6B - Jul 19, 03:25 UTCJul 19, 13:15 UTC9h 50m
2026-07-18 BAW28K - Jul 18, 14:10 UTCJul 19, 00:55 UTC10h 45m
2026-07-18 BAW28F - Jul 18, 00:29 UTCJul 18, 10:15 UTC9h 46m
2026-07-17 BAW21B LHR → LAX Jul 17, 11:10 UTCJul 17, 21:30 UTC10h 20m
2026-07-16 BAW180 JFK → LHR Jul 16, 23:49 UTCJul 17, 06:10 UTC6h 20m
2026-07-16 BAW04A - Jul 16, 13:00 UTCJul 16, 20:00 UTC7h 0m
2026-07-15 BAW8DS - Jul 15, 23:25 UTCJul 16, 09:15 UTC9h 50m
2026-07-15 BAW283 - Jul 15, 10:10 UTCJul 15, 20:35 UTC10h 25m
2026-07-14 BAW11J JFK → LHR Jul 14, 23:15 UTCJul 15, 05:45 UTC6h 30m
2026-07-14 BAW181 - Jul 14, 12:20 UTCJul 14, 19:00 UTC6h 40m
2026-07-14 BAW14K JFK → LHR Jul 14, 02:10 UTCJul 14, 08:45 UTC6h 35m
2026-07-13 BAW33K - Jul 13, 16:40 UTCJul 13, 23:25 UTC6h 45m
2026-07-13 BAW28F - Jul 13, 00:50 UTCJul 13, 10:25 UTC9h 35m
2026-07-12 BAW21B - Jul 12, 12:05 UTCJul 12, 22:30 UTC10h 25m
2026-07-12 BAW14K JFK → LHR Jul 12, 02:35 UTCJul 12, 08:40 UTC6h 5m
2026-07-11 BAW33K LHR → JFK Jul 11, 16:15 UTCJul 11, 23:20 UTC7h 5m
2026-07-11 BAW48Q - Jul 11, 03:50 UTCJul 11, 12:20 UTC8h 30m
2026-07-10 BAW49 LHR → SEA Jul 10, 16:00 UTCJul 11, 01:25 UTC9h 25m
2026-07-10 BAW116 JFK → LHR Jul 10, 00:45 UTCJul 10, 07:00 UTC6h 15m
2026-07-09 BAW15K - Jul 9, 15:15 UTCJul 9, 22:05 UTC6h 50m
2026-07-09 BAW196E - Jul 9, 02:30 UTCJul 9, 11:15 UTC8h 45m
2026-07-08 BAW97A - Jul 8, 14:35 UTCJul 9, 00:05 UTC9h 30m
2026-07-08 BAW14K JFK → LHR Jul 8, 02:05 UTCJul 8, 08:40 UTC6h 35m
2026-07-07 BAW33K LHR → JFK Jul 7, 16:20 UTCJul 7, 23:20 UTC7h 0m
2026-07-07 BAW48Q SEA → LHR Jul 7, 04:30 UTCJul 7, 13:05 UTC8h 35m
2026-07-06 BAW49 - Jul 6, 16:15 UTCJul 7, 01:30 UTC9h 15m
2026-07-06 BAW14K JFK → LHR Jul 6, 05:45 UTCJul 6, 11:55 UTC6h 10m
2026-07-05 BAW33K LHR → JFK Jul 5, 17:35 UTCJul 6, 00:30 UTC6h 55m
2026-07-05 BAW134 BOM → LHR Jul 5, 04:30 UTCJul 5, 13:55 UTC9h 25m
2026-07-04 BAW135 - Jul 4, 17:20 UTCJul 5, 01:35 UTC8h 15m
2026-07-04 BAW134 - Jul 4, 04:25 UTCJul 4, 13:50 UTC9h 25m
2026-07-03 BAW135 - Jul 3, 17:10 UTCJul 4, 01:45 UTC8h 35m
2026-07-03 BAW28F - Jul 3, 00:50 UTCJul 3, 10:15 UTC9h 25m
2026-07-02 BAW21B - Jul 2, 11:15 UTCJul 2, 21:55 UTC10h 40m
2026-07-01 BAW40F JFK → LHR Jul 1, 22:55 UTCJul 2, 05:20 UTC6h 25m
2026-07-01 BAW173A LHR → JFK Jul 1, 11:00 UTCJul 1, 18:10 UTC7h 10m
2026-06-30 BAW11J - Jun 30, 23:15 UTCJul 1, 05:30 UTC6h 15m

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

Mode-S 406A35 frequently asked

What is Mode-S code 406A35?
406A35 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-STBJ.
Where is Mode-S 406A35 registered?
Mode-S code 406A35 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 406A35 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 406A35, octal 20065065, decimal 4,221,493.
What flights does 406A35 operate?
Mode-S 406A35 has broadcast 20 distinct callsigns, including BAW97A, BAW196E, BAW173A, BAW40F, BAW28F.