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 BAW11J · 3,950 ft
Flights observed
190
Distinct callsigns
20
Country
GB
Last broadcast
4h 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
BAW40F - 14 2026-07-11
BAW48Q - 12 2026-07-01
BAW173A - 12 2026-07-11
BAW49 - 10 2026-06-30
BAW28F - 9 2026-07-07
BAW21B - 9 2026-07-06
BAW33K - 8 2026-07-09
BAW14K - 8 2026-07-10
BAW283 - 7 2026-07-12
BAW15K British Airways 7 2026-06-27
BAW97A - 6 2026-06-26
BAW8DS - 6 2026-07-12
BAW6B British Airways 6 2026-06-25
BAW28K British Airways 6 2026-06-24
BAW196E - 6 2026-06-27
BAW12 - 6 2026-06-20
BAW11 - 6 2026-06-19
BAW04A - 6 2026-07-02
BAW9SW - 5 2026-07-08
BAW82P British Airways 5 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 BAW11J - Jul 13, 23:15 UTCJul 14, 00:50 UTC1h 35m
2026-07-13 BAW181 - Jul 13, 12:05 UTCJul 13, 18:55 UTC6h 50m
2026-07-12 BAW8DS - Jul 12, 23:10 UTCJul 13, 08:50 UTC9h 40m
2026-07-12 BAW283 - Jul 12, 10:10 UTCJul 12, 20:40 UTC10h 30m
2026-07-11 BAW40F JFK → LHR Jul 11, 23:40 UTCJul 12, 05:55 UTC6h 15m
2026-07-11 BAW173A - Jul 11, 12:10 UTCJul 11, 19:10 UTC7h 0m
2026-07-10 BAW216 IAD → LHR Jul 10, 22:40 UTCJul 11, 05:15 UTC6h 35m
2026-07-10 BAW7W - Jul 10, 12:20 UTCJul 10, 20:10 UTC7h 50m
2026-07-10 BAW14K JFK → LHR Jul 10, 02:10 UTCJul 10, 08:30 UTC6h 20m
2026-07-09 BAW33K - Jul 9, 15:55 UTCJul 9, 23:15 UTC7h 20m
2026-07-09 BAW29C IAD → LHR Jul 9, 02:50 UTCJul 9, 09:40 UTC6h 50m
2026-07-08 BAW293 LHR → IAD Jul 8, 16:30 UTCJul 8, 23:50 UTC7h 20m
2026-07-08 BAW9SW - Jul 8, 03:15 UTCJul 8, 12:55 UTC9h 40m
2026-07-07 BAW82P LHR → SAN Jul 7, 14:15 UTCJul 8, 00:55 UTC10h 40m
2026-07-07 BAW28F - Jul 7, 00:40 UTCJul 7, 10:25 UTC9h 45m
2026-07-06 BAW21B - Jul 6, 11:15 UTCJul 6, 22:00 UTC10h 45m
2026-07-05 BAW40F JFK → LHR Jul 5, 23:05 UTCJul 6, 05:10 UTC6h 5m
2026-07-05 BAW173A LHR → JFK Jul 5, 10:55 UTCJul 5, 18:05 UTC7h 10m
2026-07-04 BAW40F JFK → LHR Jul 4, 22:50 UTCJul 5, 05:10 UTC6h 20m
2026-07-04 BAW173A LHR → JFK Jul 4, 11:10 UTCJul 4, 18:30 UTC7h 20m
2026-07-03 BAW11J JFK → LHR Jul 3, 23:15 UTCJul 4, 05:25 UTC6h 10m
2026-07-03 BAW181 LHR → EWR Jul 3, 12:05 UTCJul 3, 19:20 UTC7h 15m
2026-07-02 BAW180 JFK → LHR Jul 2, 23:40 UTCJul 3, 06:00 UTC6h 20m
2026-07-02 BAW04A - Jul 2, 12:40 UTCJul 2, 20:00 UTC7h 20m
2026-07-02 BAW51B BOS → LHR Jul 2, 03:25 UTCJul 2, 09:05 UTC5h 40m
2026-07-01 BAW50G - Jul 1, 17:35 UTCJul 2, 00:25 UTC6h 50m
2026-07-01 BAW48Q SEA → LHR Jul 1, 04:55 UTCJul 1, 13:35 UTC8h 40m
2026-06-30 BAW49 - Jun 30, 17:30 UTCJul 1, 02:35 UTC9h 5m
2026-06-29 BAW28F - Jun 29, 00:34 UTCJun 29, 10:10 UTC9h 35m
2026-06-28 BAW21B - Jun 28, 11:04 UTCJun 28, 21:10 UTC10h 5m
2026-06-28 BAW116 JFK → LHR Jun 28, 02:14 UTCJun 28, 08:05 UTC5h 50m
2026-06-27 BAW15K LHR → JFK Jun 27, 22:45 UTCJun 27, 22:55 UTC10m
2026-06-27 BAW15K LHR → JFK Jun 27, 16:10 UTCJun 27, 22:40 UTC6h 30m
2026-06-27 BAW196E - Jun 27, 02:20 UTCJun 27, 11:00 UTC8h 40m
2026-06-26 BAW97A - Jun 26, 14:25 UTCJun 27, 00:05 UTC9h 40m
2026-06-26 BAW14K JFK → LHR Jun 26, 02:24 UTCJun 26, 08:30 UTC6h 5m
2026-06-25 BAW33K LHR → JFK Jun 25, 16:09 UTCJun 25, 23:30 UTC7h 20m
2026-06-25 BAW6B SFO → LHR Jun 25, 03:24 UTCJun 25, 13:14 UTC9h 50m
2026-06-24 BAW28K LHR → SFO Jun 24, 14:39 UTCJun 25, 01:04 UTC10h 25m
2026-06-24 BAW29C IAD → LHR Jun 24, 03:00 UTCJun 24, 09:34 UTC6h 35m
2026-06-23 BAW293 - Jun 23, 16:35 UTCJun 24, 00:25 UTC7h 50m
2026-06-23 BAW9SW - Jun 23, 03:09 UTCJun 23, 13:00 UTC9h 50m
2026-06-22 BAW82P LHR → SAN Jun 22, 13:59 UTCJun 23, 00:35 UTC10h 35m
2026-06-22 BAW28F - Jun 22, 00:55 UTCJun 22, 10:40 UTC9h 45m
2026-06-21 BAW21B - Jun 21, 11:24 UTCJun 21, 21:54 UTC10h 30m
2026-06-20 BAW12 - Jun 20, 15:54 UTCJun 21, 05:15 UTC13h 20m
2026-06-19 BAW11 - Jun 19, 20:24 UTCJun 20, 08:44 UTC12h 20m
2026-06-18 BAW40F JFK → LHR Jun 18, 22:55 UTCJun 19, 05:14 UTC6h 19m
2026-06-18 BAW173A LHR → JFK Jun 18, 11:05 UTCJun 18, 18:05 UTC7h 0m
2026-06-17 BAW40F JFK → LHR Jun 17, 23:25 UTCJun 18, 05:35 UTC6h 10m

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 BAW40F, BAW48Q, BAW173A, BAW49, BAW28F.