Apparatus

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sensors Mode-S transponder

406948

ICAO 24-bit transponder address · allocated to United Kingdom

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

Hex
406948
Octal
20064510
Decimal
4,221,256
Country
GB
Tail
G-STBH
Type
B77W
Broadcasting now · callsign BAW48Q · 15,375 ft
Flights observed
107
Distinct callsigns
20
Country
GB
Last broadcast
2h ago

Current position

406948 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 406948 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
BAW48Q British Airways 9 2026-04-24
BAW40F British Airways 9 2026-05-26
BAW49 British Airways 8 2026-05-29
BAW173A British Airways 7 2026-05-26
BAW283 British Airways 5 2026-05-27
BAW97A British Airways 4 2026-05-20
BAW8DS British Airways 4 2026-05-27
BAW28F British Airways 4 2026-05-29
BAW21B British Airways 4 2026-05-28
BAW196E British Airways 4 2026-05-21
BAW15K British Airways 4 2026-05-21
BAW12 British Airways 4 2026-05-25
BAW11 British Airways 4 2026-05-24
BAW6B British Airways 3 2026-05-06
BAW33K British Airways 3 2026-05-22
BAW29C British Airways 3 2026-04-15
BAW293 British Airways 3 2026-04-14
BAW28K British Airways 3 2026-05-05
BAW180 British Airways 3 2026-04-16
BAW14K British Airways 3 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 BAW49 LHR → SEA May 29, 16:05 UTCMay 30, 01:55 UTC9h 50m
2026-05-29 BAW28F LAX → LHR May 29, 01:40 UTCMay 29, 11:50 UTC10h 10m
2026-05-28 BAW21B LHR → LAX May 28, 13:00 UTCMay 28, 23:30 UTC10h 30m
2026-05-27 BAW8DS LAX → LHR May 27, 23:10 UTCMay 28, 09:15 UTC10h 5m
2026-05-27 BAW283 LHR → LAX May 27, 10:15 UTCMay 27, 20:45 UTC10h 30m
2026-05-26 BAW40F JFK → LHR May 26, 23:10 UTCMay 27, 05:40 UTC6h 30m
2026-05-26 BAW173A LHR → JFK May 26, 11:20 UTCMay 26, 18:14 UTC6h 55m
2026-05-25 BAW12 SIN → LHR May 25, 15:50 UTCMay 26, 05:10 UTC13h 20m
2026-05-24 BAW11 LHR → SIN May 24, 19:00 UTCMay 25, 07:45 UTC12h 45m
2026-05-24 BAW9SW SAN → LHR May 24, 02:50 UTCMay 24, 12:45 UTC9h 55m
2026-05-23 BAW82P LHR → SAN May 23, 14:00 UTCMay 24, 00:35 UTC10h 35m
2026-05-23 BAW14K JFK → LHR May 23, 02:15 UTCMay 23, 08:15 UTC5h 59m
2026-05-22 BAW33K LHR → JFK May 22, 15:55 UTCMay 22, 23:05 UTC7h 10m
2026-05-22 BAW116 JFK → LHR May 22, 00:45 UTCMay 22, 06:40 UTC5h 55m
2026-05-21 BAW15K LHR → JFK May 21, 14:50 UTCMay 21, 21:55 UTC7h 5m
2026-05-21 BAW196E IAH → LHR May 21, 03:00 UTCMay 21, 11:25 UTC8h 25m
2026-05-20 BAW97A LHR → IAH May 20, 14:45 UTCMay 21, 00:40 UTC9h 55m
2026-05-19 BAW8DS LAX → LHR May 19, 23:35 UTCMay 20, 09:00 UTC9h 26m
2026-05-19 BAW283 LHR → LAX May 19, 11:00 UTCMay 19, 20:45 UTC9h 45m
2026-05-19 BAW283 LHR → LAX May 19, 10:20 UTCMay 19, 10:55 UTC35m
2026-05-18 BAW40F JFK → LHR May 18, 23:10 UTCMay 19, 05:30 UTC6h 20m
2026-05-18 BAW173A LHR → JFK May 18, 11:00 UTCMay 18, 17:50 UTC6h 50m
2026-05-18 BAW116 JFK → LHR May 18, 01:25 UTCMay 18, 07:40 UTC6h 15m
2026-05-17 BAW15K LHR → JFK May 17, 15:35 UTCMay 17, 22:35 UTC7h 0m
2026-05-17 BAW8DS LAX → LHR May 17, 00:20 UTCMay 17, 09:45 UTC9h 25m
2026-05-16 BAW283 LHR → LAX May 16, 11:25 UTCMay 16, 21:45 UTC10h 20m
2026-05-14 BAW9SW SAN → LHR May 14, 04:35 UTCMay 14, 14:10 UTC9h 35m
2026-05-13 BAW82P LHR → SAN May 13, 15:15 UTCMay 14, 02:15 UTC11h 0m
2026-05-13 BAW14K JFK → LHR May 13, 02:05 UTCMay 13, 08:45 UTC6h 40m
2026-05-12 BAW33K LHR → JFK May 12, 16:05 UTCMay 12, 23:15 UTC7h 10m
2026-05-12 BAW28F LAX → LHR May 12, 02:45 UTCMay 12, 10:20 UTC7h 35m
2026-05-11 BAW21B LHR → LAX May 11, 11:15 UTCMay 11, 22:00 UTC10h 46m
2026-05-10 BAW12 SIN → LHR May 10, 16:04 UTCMay 11, 05:45 UTC13h 40m
2026-05-09 BAW11 LHR → SIN May 9, 18:50 UTCMay 10, 07:04 UTC12h 15m
2026-05-09 BAW196E IAH → LHR May 9, 02:50 UTCMay 9, 11:20 UTC8h 30m
2026-05-08 BAW97A LHR → IAH May 8, 14:15 UTCMay 9, 00:25 UTC10h 10m
2026-05-07 BAW12 SIN → LHR May 7, 15:55 UTCMay 8, 05:24 UTC13h 30m
2026-05-06 BAW11 LHR → SIN May 6, 19:05 UTCMay 7, 07:25 UTC12h 20m
2026-05-06 BAW6B SFO → LHR May 6, 03:15 UTCMay 6, 13:10 UTC9h 55m
2026-05-05 BAW28K LHR → SFO May 5, 14:00 UTCMay 5, 23:55 UTC9h 55m
2026-05-05 BAW28F LAX → LHR May 5, 00:25 UTCMay 5, 10:10 UTC9h 45m
2026-05-04 BAW21B LHR → LAX May 4, 11:15 UTCMay 4, 21:55 UTC10h 41m
2026-05-04 BAW116 JFK → LHR May 4, 00:45 UTCMay 4, 07:30 UTC6h 45m
2026-05-03 BAW15K LHR → JFK May 3, 20:10 UTCMay 3, 21:54 UTC1h 45m
2026-05-03 BAW15K LHR → JFK May 3, 14:55 UTCMay 3, 16:05 UTC1h 10m
2026-05-03 BAW196E IAH → LHR May 3, 02:25 UTCMay 3, 10:55 UTC8h 29m
2026-05-02 BAW97A LHR → IAH May 2, 14:25 UTCMay 2, 23:55 UTC9h 30m
2026-05-02 BAW28F LAX → LHR May 2, 00:25 UTCMay 2, 10:40 UTC10h 15m
2026-05-01 BAW21B LHR → LAX May 1, 11:30 UTCMay 1, 21:55 UTC10h 25m
2026-04-29 BAW8DS LAX → LHR Apr 29, 23:20 UTCApr 30, 09:15 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-STBH page for operator, model, and routing details .

Mode-S 406948 frequently asked

What is Mode-S code 406948?
406948 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-STBH.
Where is Mode-S 406948 registered?
Mode-S code 406948 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 406948 broadcasting right now?
Yes. Mode-S 406948 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 406948, octal 20064510, decimal 4,221,256.
What flights does 406948 operate?
Mode-S 406948 has broadcast 20 distinct callsigns, including BAW48Q, BAW40F, BAW49, BAW173A, BAW283.