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 50m ago
Flights observed
201
Distinct callsigns
20
Country
GB
Last broadcast
50m ago

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 - 17 2026-07-08
BAW196E - 16 2026-07-09
BAW173A British Airways 14 2026-07-01
BAW40F - 12 2026-07-01
BAW293 - 10 2026-06-28
BAW29C - 9 2026-06-29
BAW28F - 9 2026-07-13
BAW283 British Airways 9 2026-06-24
BAW21B - 9 2026-07-12
BAW49 - 8 2026-07-10
BAW8DS - 7 2026-06-24
BAW48Q - 6 2026-07-11
BAW33K - 6 2026-07-13
BAW180 - 6 2026-06-14
BAW15K - 6 2026-07-09
BAW14K - 6 2026-07-14
BAW116 - 6 2026-07-10
BAW04A - 6 2026-06-14
BAW11J - 5 2026-06-30
BAW9SW British Airways 3 2026-05-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
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
2026-06-30 BAW181 LHR → EWR Jun 30, 12:30 UTCJun 30, 19:20 UTC6h 50m
2026-06-30 BAW116 JFK → LHR Jun 30, 01:19 UTCJun 30, 07:25 UTC6h 5m
2026-06-29 BAW15K LHR → JFK Jun 29, 15:04 UTCJun 29, 22:00 UTC6h 55m
2026-06-29 BAW29C IAD → LHR Jun 29, 03:25 UTCJun 29, 09:44 UTC6h 20m
2026-06-28 BAW293 - Jun 28, 17:44 UTCJun 29, 01:05 UTC7h 20m
2026-06-28 BAW196E - Jun 28, 03:19 UTCJun 28, 11:45 UTC8h 25m
2026-06-27 BAW97A - Jun 27, 16:04 UTCJun 28, 01:10 UTC9h 5m
2026-06-27 BAW28F - Jun 27, 00:34 UTCJun 27, 10:40 UTC10h 5m
2026-06-26 BAW21B - Jun 26, 11:24 UTCJun 26, 21:59 UTC10h 35m
2026-06-25 BAW212 BOS → LHR Jun 25, 23:49 UTCJun 26, 05:30 UTC5h 40m
2026-06-25 BAW213 LHR → BOS Jun 25, 13:59 UTCJun 25, 20:59 UTC7h 0m
2026-06-24 BAW8DS - Jun 24, 23:10 UTCJun 25, 09:05 UTC9h 55m
2026-06-24 BAW283 LHR → LAX Jun 24, 09:59 UTCJun 24, 20:40 UTC10h 40m
2026-06-24 BAW212 BOS → LHR Jun 24, 00:05 UTCJun 24, 05:59 UTC5h 55m
2026-06-23 BAW213 LHR → BOS Jun 23, 14:35 UTCJun 23, 21:24 UTC6h 50m
2026-06-23 BAW29C - Jun 23, 02:45 UTCJun 23, 09:14 UTC6h 30m
2026-06-22 BAW293 - Jun 22, 16:50 UTCJun 23, 00:24 UTC7h 35m
2026-06-22 BAW196E - Jun 22, 02:25 UTCJun 22, 10:55 UTC8h 30m
2026-06-21 BAW97A - Jun 21, 14:19 UTCJun 22, 00:10 UTC9h 50m
2026-06-21 BAW298 PWK → LHR Jun 21, 00:29 UTCJun 21, 07:45 UTC7h 15m
2026-06-20 BAW299 - Jun 20, 12:24 UTCJun 20, 20:20 UTC7h 55m
2026-06-20 BAW14K JFK → LHR Jun 20, 02:29 UTCJun 20, 08:29 UTC6h 0m
2026-06-19 BAW33K LHR → JFK Jun 19, 16:04 UTCJun 19, 23:19 UTC7h 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 50m ago.
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, BAW293.