Apparatus

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sensors Mode-S transponder

407924

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-TAJB · AIRBUS HELICOPTERS EC-145

Hex
407924
Octal
20074444
Decimal
4,225,316
Country
GB
Tail
G-TAJB
Type
EC45
No current signal · last broadcast 6h ago
Flights observed
125
Distinct callsigns
3
Country
GB
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 407924.

Country allocation

The ICAO 24-bit address 407924 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 3 distinct

Callsign Airline Flights Last seen
WDK45 - 119 2026-07-18
WDK45T - 4 2026-07-13
WHITE14 - 2 2026-06-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 WDK45 - Jul 18, 21:00 UTCJul 18, 21:25 UTC25m
2026-07-18 WDK45 - Jul 18, 09:25 UTCJul 18, 09:35 UTC10m
2026-07-17 WDK45 - Jul 17, 08:49 UTCJul 17, 09:30 UTC40m
2026-07-15 WDK45 - Jul 15, 17:50 UTCJul 15, 18:25 UTC35m
2026-07-15 WDK45 - Jul 15, 07:40 UTCJul 15, 07:50 UTC10m
2026-07-14 WDK45 - Jul 14, 15:00 UTCJul 14, 16:10 UTC1h 10m
2026-07-14 WDK45 - Jul 14, 06:20 UTCJul 14, 08:15 UTC1h 55m
2026-07-13 WDK45T - Jul 13, 13:45 UTCJul 13, 15:00 UTC1h 15m
2026-07-13 WDK45 - Jul 13, 12:20 UTCJul 13, 13:05 UTC45m
2026-07-13 WDK45 - Jul 13, 11:30 UTCJul 13, 11:45 UTC15m
2026-07-13 WDK45 LPL → OXF Jul 13, 06:25 UTCJul 13, 07:20 UTC55m
2026-07-12 WDK45 BLK → LPL Jul 12, 09:40 UTCJul 12, 10:01 UTC20m
2026-07-12 WDK45 - Jul 12, 08:20 UTCJul 12, 08:35 UTC15m
2026-07-12 WDK45 - Jul 12, 07:45 UTCJul 12, 08:01 UTC15m
2026-07-10 WDK45 - Jul 10, 20:35 UTCJul 10, 21:15 UTC40m
2026-07-10 WDK45 - Jul 10, 19:50 UTCJul 10, 20:25 UTC35m
2026-07-10 WDK45 - Jul 10, 11:10 UTCJul 10, 12:50 UTC1h 40m
2026-07-10 WDK45 - Jul 10, 10:30 UTCJul 10, 10:35 UTC5m
2026-07-09 WDK45 - Jul 9, 16:55 UTCJul 9, 18:20 UTC1h 25m
2026-07-09 WDK45 LPL → QUG Jul 9, 08:45 UTCJul 9, 10:25 UTC1h 40m
2026-07-05 WDK45 - Jul 5, 18:35 UTCJul 5, 19:50 UTC1h 15m
2026-07-05 WDK45 - Jul 5, 17:55 UTCJul 5, 18:25 UTC30m
2026-07-05 WDK45 - Jul 5, 07:55 UTCJul 5, 09:20 UTC1h 25m
2026-07-05 WDK45 LPL → BLK Jul 5, 06:50 UTCJul 5, 07:10 UTC20m
2026-07-02 WDK45 - Jul 2, 16:35 UTCJul 2, 17:00 UTC25m
2026-07-02 WDK45 - Jul 2, 15:35 UTCJul 2, 15:55 UTC20m
2026-07-02 WDK45 - Jul 2, 14:45 UTCJul 2, 15:05 UTC20m
2026-07-02 WDK45 - Jul 2, 13:45 UTCJul 2, 14:00 UTC15m
2026-07-02 WDK45 - Jul 2, 12:40 UTCJul 2, 12:55 UTC15m
2026-07-01 WDK45 - Jul 1, 15:40 UTCJul 1, 15:55 UTC15m
2026-07-01 WDK45 - Jul 1, 14:35 UTCJul 1, 14:50 UTC15m
2026-07-01 WDK45 - Jul 1, 13:45 UTCJul 1, 13:55 UTC10m
2026-07-01 WDK45 - Jul 1, 10:15 UTCJul 1, 10:45 UTC30m
2026-06-30 WDK45 - Jun 30, 10:10 UTCJun 30, 11:50 UTC1h 40m
2026-06-28 WDK45 - Jun 28, 09:30 UTCJun 28, 11:14 UTC1h 45m
2026-06-26 WDK45 LPL → LPL Jun 26, 15:29 UTCJun 26, 17:44 UTC2h 15m
2026-06-25 WDK45T CEG → LPL Jun 25, 11:50 UTCJun 25, 12:25 UTC35m
2026-06-25 WDK45T CEG → CEG Jun 25, 11:19 UTCJun 25, 11:44 UTC25m
2026-06-25 WDK45T LBA → CEG Jun 25, 10:04 UTCJun 25, 11:15 UTC1h 10m
2026-06-25 WDK45 - Jun 25, 06:30 UTCJun 25, 06:44 UTC15m
2026-06-25 WDK45 - Jun 25, 05:35 UTCJun 25, 05:50 UTC15m
2026-06-23 WDK45 - Jun 23, 14:25 UTCJun 23, 14:44 UTC20m
2026-06-23 WDK45 - Jun 23, 09:54 UTCJun 23, 10:15 UTC20m
2026-06-20 WDK45 - Jun 20, 21:34 UTCJun 20, 22:20 UTC45m
2026-06-20 WDK45 - Jun 20, 21:00 UTCJun 20, 21:10 UTC10m
2026-06-20 WDK45 - Jun 20, 14:54 UTCJun 20, 15:09 UTC15m
2026-06-20 WDK45 - Jun 20, 14:24 UTCJun 20, 14:39 UTC15m
2026-06-20 WDK45 - Jun 20, 13:24 UTCJun 20, 13:34 UTC10m
2026-06-19 WDK45 - Jun 19, 14:49 UTCJun 19, 16:25 UTC1h 35m
2026-06-19 WDK45 - Jun 19, 13:59 UTCJun 19, 14:19 UTC20m

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

Mode-S 407924 frequently asked

What is Mode-S code 407924?
407924 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-TAJB.
Where is Mode-S 407924 registered?
Mode-S code 407924 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 407924 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 407924, octal 20074444, decimal 4,225,316.
What flights does 407924 operate?
Mode-S 407924 has broadcast 3 distinct callsigns, including WDK45, WDK45T, WHITE14.