Apparatus

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sensors Mode-S transponder

400804

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-EUPD · AIRBUS A-319

Hex
400804
Octal
20004004
Decimal
4,196,356
Country
GB
Tail
G-EUPD
Type
A319
No current signal · last broadcast 59m ago
Flights observed
164
Distinct callsigns
20
Country
GB
Last broadcast
59m ago

Last known position

Most recent position reported by Mode-S 400804.

Country allocation

The ICAO 24-bit address 400804 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
SHT13C - 3 2026-05-26
SHT12H - 3 2026-05-26
BAW462V British Airways 3 2026-04-27
BAW43M British Airways 3 2026-04-27
SHT5V - 2 2026-04-27
SHT4C - 2 2026-04-27
BAW997T - 2 2026-04-13
BAW873 - 2 2026-04-16
BAW872 British Airways 2 2026-04-16
BAW867 - 2 2026-04-17
BAW866H - 2 2026-04-17
BAW845 British Airways 2 2026-05-17
BAW844 British Airways 2 2026-05-17
BAW822 British Airways 2 2026-05-18
BAW807K - 2 2026-04-15
BAW786 British Airways 2 2026-04-18
BAW755 British Airways 2 2026-04-21
BAW754 British Airways 2 2026-04-21
BAW585 British Airways 2 2026-04-28
BAW584 British Airways 2 2026-04-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 BAW384 LHR → CAI May 30, 07:00 UTCMay 30, 08:15 UTC1h 15m
2026-05-29 SHT3H MAN → LHR May 29, 19:45 UTCMay 29, 20:20 UTC35m
2026-05-29 SHT2N LHR → MAN May 29, 18:10 UTCMay 29, 18:45 UTC35m
2026-05-29 BAW387 MRS → LHR May 29, 15:20 UTCMay 29, 16:00 UTC40m
2026-05-29 BAW386 LHR → BRU May 29, 13:40 UTCMay 29, 14:20 UTC40m
2026-05-29 BAW745 HER → LHR May 29, 09:40 UTCMay 29, 11:05 UTC1h 25m
2026-05-29 BAW744 LHR → HER May 29, 07:10 UTCMay 29, 08:20 UTC1h 10m
2026-05-28 SHT9B - May 28, 17:10 UTCMay 28, 18:20 UTC1h 10m
2026-05-28 SHT8R - May 28, 15:15 UTCMay 28, 16:10 UTC55m
2026-05-28 BAW469 VCE → LHR May 28, 11:35 UTCMay 28, 13:45 UTC2h 10m
2026-05-28 BAW468 LHR → VCE May 28, 07:40 UTCMay 28, 09:30 UTC1h 50m
2026-05-27 BAW341 NCE → LHR May 27, 16:00 UTCMay 27, 17:40 UTC1h 40m
2026-05-27 BAW340E LHR → NCE May 27, 15:05 UTCMay 27, 15:50 UTC45m
2026-05-27 BAW340E LHR → NCE May 27, 13:20 UTCMay 27, 14:55 UTC1h 35m
2026-05-27 BAW743 HER → LHR May 27, 08:20 UTCMay 27, 09:30 UTC1h 10m
2026-05-27 BAW742 LHR → HER May 27, 05:49 UTCMay 27, 07:00 UTC1h 11m
2026-05-26 BAW391 BRU → LHR May 26, 18:10 UTCMay 26, 18:55 UTC45m
2026-05-26 BAW9CJ - May 26, 16:20 UTCMay 26, 16:59 UTC40m
2026-05-26 BAW433 AMS → LHR May 26, 13:15 UTCMay 26, 14:00 UTC45m
2026-05-26 BAW432 LHR → AMS May 26, 11:15 UTCMay 26, 12:00 UTC45m
2026-05-26 SHT13C NCL → LHR May 26, 08:15 UTCMay 26, 09:25 UTC1h 10m
2026-05-26 SHT12H - May 26, 06:25 UTCMay 26, 07:10 UTC45m
2026-05-23 BAW935 DUS → LHR May 23, 16:35 UTCMay 23, 18:00 UTC1h 25m
2026-05-23 BAW934 LHR → HAJ May 23, 13:20 UTCMay 23, 14:40 UTC1h 20m
2026-05-22 SHT9Q - May 22, 17:40 UTCMay 22, 19:00 UTC1h 20m
2026-05-22 SHT8Q - May 22, 15:50 UTCMay 22, 16:40 UTC50m
2026-05-22 BAW433 AMS → LHR May 22, 13:30 UTCMay 22, 14:25 UTC55m
2026-05-22 BAW432 LHR → AMS May 22, 11:35 UTCMay 22, 12:10 UTC35m
2026-05-22 SHT3P MAN → LHR May 22, 08:30 UTCMay 22, 09:10 UTC40m
2026-05-22 SHT2V - May 22, 06:20 UTCMay 22, 06:55 UTC35m
2026-05-20 BAW9274 SNN → LHR May 20, 19:05 UTCMay 20, 20:35 UTC1h 30m
2026-05-18 BAW822 LHR → CPH May 18, 19:35 UTCMay 18, 20:55 UTC1h 20m
2026-05-18 SHT13K NCL → LHR May 18, 15:45 UTCMay 18, 16:35 UTC50m
2026-05-18 SHT12Z - May 18, 13:55 UTCMay 18, 14:45 UTC50m
2026-05-18 BAW947L MUC → LHR May 18, 10:15 UTCMay 18, 12:30 UTC2h 15m
2026-05-18 BAW946 LHR → DUS May 18, 06:40 UTCMay 18, 08:25 UTC1h 45m
2026-05-17 BAW845 DBV → LHR May 17, 16:25 UTCMay 17, 18:35 UTC2h 10m
2026-05-17 BAW844 LHR → DBV May 17, 13:15 UTCMay 17, 15:20 UTC2h 5m
2026-05-17 SHT13C NCL → LHR May 17, 08:45 UTCMay 17, 09:40 UTC55m
2026-05-17 SHT12H LHR → NCL May 17, 07:00 UTCMay 17, 07:45 UTC45m
2026-05-13 BAW741 GVA → LHR May 13, 05:45 UTCMay 13, 07:20 UTC1h 35m
2026-05-12 BAW740 LHR → HER May 12, 19:10 UTCMay 12, 20:25 UTC1h 15m
2026-05-12 BAW751 BSL → LHR May 12, 15:40 UTCMay 12, 16:55 UTC1h 15m
2026-05-12 BAW750 LHR → BSL May 12, 13:20 UTCMay 12, 14:25 UTC1h 5m
2026-05-09 BAW495 PMI → LHR May 9, 17:45 UTCMay 9, 19:49 UTC2h 5m
2026-05-09 BAW494 LHR → AGP May 9, 13:10 UTCMay 9, 15:15 UTC2h 5m
2026-05-09 SHT19D ABZ → LHR May 9, 09:25 UTCMay 9, 10:40 UTC1h 15m
2026-05-09 SHT18M - May 9, 07:10 UTCMay 9, 08:10 UTC1h 0m
2026-05-04 BAW725 GVA → LHR May 4, 17:40 UTCMay 4, 19:40 UTC2h 1m
2026-05-04 BAW72J LHR → GVA May 4, 14:35 UTCMay 4, 16:25 UTC1h 50m

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

Mode-S 400804 frequently asked

What is Mode-S code 400804?
400804 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-EUPD.
Where is Mode-S 400804 registered?
Mode-S code 400804 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 400804 broadcasting right now?
No active broadcast right now. Last signal was 59m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 400804, octal 20004004, decimal 4,196,356.
What flights does 400804 operate?
Mode-S 400804 has broadcast 20 distinct callsigns, including SHT13C, SHT12H, BAW462V, BAW43M, SHT5V.