sensors Mode-S transponder

406947

ICAO 24-bit transponder address · allocated to United Kingdom

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

Hex
406947
Octal
20064507
Decimal
4,221,255
Country
GB
Tail
G-STBG
Type
B77W
No current signal · last broadcast 18h ago
Flights observed
106
Distinct callsigns
20
Country
GB
Last broadcast
18h ago

Last known position

Most recent position reported by Mode-S 406947.

Country allocation

The ICAO 24-bit address 406947 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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 BAW29G BOS → LHR May 29, 11:50 UTCMay 29, 17:55 UTC6h 5m
2026-05-28 BAW239 LHR → BOS May 28, 19:50 UTCMay 29, 02:15 UTC6h 25m
2026-05-27 BAW12 SIN → LHR May 27, 15:40 UTCMay 28, 05:20 UTC13h 40m
2026-05-26 BAW11 LHR → SIN May 26, 18:59 UTCMay 27, 07:05 UTC12h 6m
2026-05-26 BAW9SW SAN → LHR May 26, 03:00 UTCMay 26, 12:50 UTC9h 50m
2026-05-25 BAW82P LHR → SAN May 25, 14:10 UTCMay 26, 00:54 UTC10h 45m
2026-05-25 BAW28F LAX → LHR May 25, 02:05 UTCMay 25, 10:30 UTC8h 25m
2026-05-24 BAW21B LHR → LAX May 24, 11:15 UTCMay 24, 21:45 UTC10h 30m
2026-05-23 BAW12 SIN → LHR May 23, 15:55 UTCMay 24, 05:20 UTC13h 26m
2026-05-22 BAW11 LHR → SIN May 22, 19:05 UTCMay 23, 07:45 UTC12h 40m
2026-05-22 BAW48Q SEA → LHR May 22, 04:05 UTCMay 22, 13:10 UTC9h 5m
2026-05-21 BAW49 LHR → SEA May 21, 16:50 UTCMay 22, 01:40 UTC8h 50m
2026-05-21 BAW6B SFO → LHR May 21, 02:50 UTCMay 21, 12:25 UTC9h 35m
2026-05-20 BAW28K LHR → SFO May 20, 14:15 UTCMay 21, 00:20 UTC10h 5m
2026-05-20 BAW14K JFK → LHR May 20, 03:15 UTCMay 20, 09:45 UTC6h 31m
2026-05-19 BAW33K LHR → JFK May 19, 16:10 UTCMay 19, 23:05 UTC6h 55m
2026-05-19 BAW29C IAD → LHR May 19, 05:10 UTCMay 19, 12:00 UTC6h 50m
2026-05-18 BAW293 LHR → IAD May 18, 16:45 UTCMay 19, 00:05 UTC7h 19m
2026-05-18 BAW196E IAH → LHR May 18, 03:25 UTCMay 18, 12:05 UTC8h 40m
2026-05-17 BAW97A LHR → IAH May 17, 15:15 UTCMay 18, 01:00 UTC9h 45m
2026-05-17 BAW28F LAX → LHR May 17, 00:35 UTCMay 17, 10:05 UTC9h 30m
2026-05-16 BAW21B LHR → LAX May 16, 11:31 UTCMay 16, 21:50 UTC10h 19m
2026-05-15 BAW12 SIN → LHR May 15, 15:50 UTCMay 16, 05:10 UTC13h 20m
2026-05-14 BAW11 LHR → SIN May 14, 20:10 UTCMay 15, 08:25 UTC12h 15m
2026-05-14 BAW6B SFO → LHR May 14, 04:55 UTCMay 14, 14:05 UTC9h 10m
2026-05-13 BAW28K LHR → SFO May 13, 15:35 UTCMay 14, 02:35 UTC11h 0m
2026-05-13 BAW28F LAX → LHR May 13, 00:20 UTCMay 13, 10:25 UTC10h 5m
2026-05-12 BAW21B LHR → LAX May 12, 11:10 UTCMay 12, 21:45 UTC10h 35m
2026-05-12 BAW116 JFK → LHR May 12, 05:45 UTCMay 12, 07:10 UTC1h 25m
2026-05-11 BAW15K LHR → JFK May 11, 14:45 UTCMay 11, 21:55 UTC7h 11m
2026-05-11 BAW196E IAH → LHR May 11, 02:40 UTCMay 11, 11:05 UTC8h 25m
2026-05-10 BAW97A LHR → IAH May 10, 14:20 UTCMay 11, 00:10 UTC9h 50m
2026-05-09 BAW12 SIN → LHR May 9, 15:50 UTCMay 10, 05:20 UTC13h 30m
2026-05-08 BAW11 LHR → SIN May 8, 19:00 UTCMay 9, 06:55 UTC11h 55m
2026-05-07 BAW8DS LAX → LHR May 7, 22:59 UTCMay 8, 08:59 UTC10h 0m
2026-05-07 BAW283 LHR → LAX May 7, 10:05 UTCMay 7, 20:15 UTC10h 10m
2026-05-06 BAW196E IAH → LHR May 6, 02:20 UTCMay 6, 10:55 UTC8h 35m
2026-05-05 BAW97A LHR → IAH May 5, 14:10 UTCMay 5, 23:55 UTC9h 45m
2026-05-05 BAW196E IAH → LHR May 5, 02:10 UTCMay 5, 11:00 UTC8h 50m
2026-05-04 BAW97A LHR → IAH May 4, 14:20 UTCMay 4, 23:45 UTC9h 26m
2026-05-04 BAW196E IAH → LHR May 4, 02:39 UTCMay 4, 11:30 UTC8h 50m
2026-05-03 BAW97A LHR → IAH May 3, 14:15 UTCMay 3, 23:50 UTC9h 35m
2026-05-03 BAW14K JFK → LHR May 3, 02:00 UTCMay 3, 08:15 UTC6h 14m
2026-05-02 BAW33K LHR → JFK May 2, 16:00 UTCMay 2, 23:05 UTC7h 5m
2026-05-02 BAW6B SFO → LHR May 2, 03:05 UTCMay 2, 12:45 UTC9h 40m
2026-05-01 BAW28K LHR → SFO May 1, 14:20 UTCMay 2, 00:50 UTC10h 30m
2026-05-01 BAW28F LAX → LHR May 1, 00:20 UTCMay 1, 10:20 UTC10h 0m
2026-04-30 BAW21B LHR → LAX Apr 30, 11:05 UTCApr 30, 21:35 UTC10h 30m
2026-04-29 BAW12 SIN → LHR Apr 29, 15:50 UTCApr 30, 05:25 UTC13h 34m
2026-04-28 BAW11 LHR → SIN Apr 28, 18:55 UTCApr 29, 07:29 UTC12h 35m

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

Mode-S 406947 frequently asked

What is Mode-S code 406947?
406947 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-STBG.
Where is Mode-S 406947 registered?
Mode-S code 406947 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 406947 broadcasting right now?
No active broadcast right now. Last signal was 18h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 406947, octal 20064507, decimal 4,221,255.
What flights does 406947 operate?
Mode-S 406947 has broadcast 20 distinct callsigns, including BAW28K, BAW6B, BAW12, BAW11, BAW28F.