Apparatus

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sensors Mode-S transponder

400981

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-EUUF · AIRBUS A-320

Hex
400981
Octal
20004601
Decimal
4,196,737
Country
GB
Tail
G-EUUF
Type
A320
No current signal · last broadcast 24m ago
Flights observed
240
Distinct callsigns
20
Country
GB
Last broadcast
24m ago

Last known position

Most recent position reported by Mode-S 400981.

Country allocation

The ICAO 24-bit address 400981 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
SHT7Z - 4 2026-05-29
SHT1481 - 4 2026-05-29
SHT1480 - 4 2026-05-29
BAW5B British Airways 4 2026-05-14
BAW541A British Airways 4 2026-05-14
BAW309 British Airways 4 2026-05-13
BAW308 British Airways 4 2026-05-13
SHT6C - 3 2026-05-28
BAW88LP British Airways 3 2026-04-13
BAW863Z British Airways 3 2026-04-27
BAW862U British Airways 3 2026-04-27
BAW831 British Airways 3 2026-05-26
BAW830D British Airways 3 2026-05-26
BAW619 British Airways 3 2026-05-27
BAW618 British Airways 3 2026-05-27
BAW549 British Airways 3 2026-05-02
BAW548 British Airways 3 2026-05-02
BAW490 British Airways 3 2026-04-15
BAW438W British Airways 3 2026-04-20
SHT9Z - 2 2026-05-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 BAW617 PEG → LHR May 30, 18:40 UTCMay 30, 20:15 UTC1h 35m
2026-05-30 BAW616 PEG → LHR May 30, 15:35 UTCMay 30, 17:15 UTC1h 40m
2026-05-30 BAW539 FCO → LHR May 30, 11:30 UTCMay 30, 14:10 UTC2h 40m
2026-05-30 BAW538 LHR → FCO May 30, 07:30 UTCMay 30, 09:55 UTC2h 25m
2026-05-29 BAW499 LIS → LHR May 29, 18:55 UTCMay 29, 20:50 UTC1h 55m
2026-05-29 BAW2LY LHR → PMI May 29, 15:30 UTCMay 29, 17:15 UTC1h 45m
2026-05-29 SHT7Z GLA → LHR May 29, 12:40 UTCMay 29, 13:40 UTC1h 0m
2026-05-29 SHT1480 LGW → GLA May 29, 10:30 UTCMay 29, 11:30 UTC1h 0m
2026-05-29 SHT1481 GLA → LGW May 29, 06:50 UTCMay 29, 08:10 UTC1h 20m
2026-05-28 SHT6C - May 28, 18:05 UTCMay 28, 18:55 UTC50m
2026-05-28 BAW643 ATH → LHR May 28, 12:15 UTCMay 28, 15:15 UTC3h 0m
2026-05-28 BAW642 LHR → EFL May 28, 08:15 UTCMay 28, 10:35 UTC2h 20m
2026-05-28 SHT19Y - May 28, 05:40 UTCMay 28, 06:50 UTC1h 10m
2026-05-27 SHT18P - May 27, 21:00 UTCMay 27, 22:00 UTC1h 0m
2026-05-27 BAW7PI OSL → LHR May 27, 18:35 UTCMay 27, 19:45 UTC1h 10m
2026-05-27 BAW762 LHR → OSL May 27, 16:00 UTCMay 27, 17:10 UTC1h 10m
2026-05-27 BAW619 LHR → OLB May 27, 11:00 UTCMay 27, 13:25 UTC2h 25m
2026-05-27 BAW618 LHR → OLB May 27, 07:05 UTCMay 27, 09:35 UTC2h 30m
2026-05-26 BAW831 DUB → LHR May 26, 14:50 UTCMay 26, 15:49 UTC1h 0m
2026-05-26 BAW830D LHR → DUB May 26, 12:30 UTCMay 26, 13:15 UTC45m
2026-05-26 SHT9Z - May 26, 09:35 UTCMay 26, 10:44 UTC1h 10m
2026-05-26 SHT8G - May 26, 07:19 UTCMay 26, 08:10 UTC50m
2026-05-25 BAW465M MAD → LHR May 25, 19:50 UTCMay 25, 21:24 UTC1h 35m
2026-05-25 BAW46BL LHR → MAD May 25, 16:40 UTCMay 25, 18:30 UTC1h 50m
2026-05-25 BAW615 BDS → LHR May 25, 12:25 UTCMay 25, 14:20 UTC1h 55m
2026-05-25 BAW614 BDS → LHR May 25, 09:10 UTCMay 25, 10:55 UTC1h 45m
2026-05-24 BAW667 CHQ → LHR May 24, 16:00 UTCMay 24, 19:20 UTC3h 20m
2026-05-24 BAW66K LHR → JMK May 24, 11:25 UTCMay 24, 14:50 UTC3h 25m
2026-05-24 BAW6NL LIN → LHR May 24, 07:15 UTCMay 24, 09:15 UTC2h 0m
2026-05-23 BAW564Y LHR → LIN May 23, 19:15 UTCMay 23, 21:20 UTC2h 5m
2026-05-23 BAW451 PMI → LHR May 23, 13:45 UTCMay 23, 15:55 UTC2h 10m
2026-05-23 BAW450 LHR → PMI May 23, 10:30 UTCMay 23, 12:30 UTC2h 0m
2026-05-23 BAW825 PRG → LHR May 23, 07:55 UTCMay 23, 08:55 UTC1h 0m
2026-05-23 BAW82DM LHR → DUB May 23, 05:45 UTCMay 23, 06:40 UTC55m
2026-05-22 BAW483Z BCN → LHR May 22, 18:45 UTCMay 22, 20:35 UTC1h 50m
2026-05-22 BAW482P LHR → BCN May 22, 15:45 UTCMay 22, 17:25 UTC1h 40m
2026-05-22 BAW675 IST → LHR May 22, 10:50 UTCMay 22, 13:45 UTC2h 55m
2026-05-22 BAW674 PVK → LHR May 22, 06:15 UTCMay 22, 08:50 UTC2h 35m
2026-05-21 SHT9L EDI → LHR May 21, 19:45 UTCMay 21, 20:40 UTC55m
2026-05-21 SHT8K - May 21, 17:35 UTCMay 21, 18:30 UTC55m
2026-05-21 BAW831 DUB → LHR May 21, 14:55 UTCMay 21, 15:45 UTC50m
2026-05-21 BAW830D LHR → DUB May 21, 12:15 UTCMay 21, 13:05 UTC50m
2026-05-21 BAW813C CPH → LHR May 21, 09:00 UTCMay 21, 10:35 UTC1h 35m
2026-05-21 BAW812 LHR → CPH May 21, 06:25 UTCMay 21, 07:50 UTC1h 25m
2026-05-20 BAW995 BER → LHR May 20, 18:40 UTCMay 20, 20:10 UTC1h 30m
2026-05-20 BAW994 LHR → BER May 20, 15:30 UTCMay 20, 16:50 UTC1h 20m
2026-05-20 SHT7Z GLA → LHR May 20, 12:45 UTCMay 20, 13:45 UTC1h 0m
2026-05-20 SHT1480 LGW → GLA May 20, 10:30 UTCMay 20, 11:35 UTC1h 5m
2026-05-20 SHT1481 GLA → LGW May 20, 07:05 UTCMay 20, 08:10 UTC1h 5m
2026-05-19 SHT6C LHR → GLA May 19, 17:35 UTCMay 19, 18:30 UTC55m

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

Mode-S 400981 frequently asked

What is Mode-S code 400981?
400981 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-EUUF.
Where is Mode-S 400981 registered?
Mode-S code 400981 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 400981 broadcasting right now?
No active broadcast right now. Last signal was 24m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 400981, octal 20004601, decimal 4,196,737.
What flights does 400981 operate?
Mode-S 400981 has broadcast 20 distinct callsigns, including SHT7Z, SHT1481, SHT1480, BAW5B, BAW541A.