Apparatus

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sensors Mode-S transponder

404B1C

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-CCTH · EVEKTRO EV-97 EuroStar

Hex
404B1C
Octal
20045434
Decimal
4,213,532
Country
GB
Tail
G-CCTH
Type
EV97
No current signal · last broadcast 10h ago
Flights observed
90
Distinct callsigns
1
Country
GB
Last broadcast
10h ago

Last known position

Most recent position reported by Mode-S 404B1C.

Country allocation

The ICAO 24-bit address 404B1C 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 1 distinct

Callsign Airline Flights Last seen
INV09 - 90 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 INV09 - Jul 17, 19:00 UTCJul 17, 19:15 UTC15m
2026-07-16 INV09 - Jul 16, 17:30 UTCJul 16, 18:10 UTC40m
2026-07-16 INV09 - Jul 16, 15:25 UTCJul 16, 15:45 UTC20m
2026-07-16 INV09 - Jul 16, 11:05 UTCJul 16, 11:54 UTC50m
2026-07-14 INV09 - Jul 14, 10:55 UTCJul 14, 12:25 UTC1h 30m
2026-07-12 INV09 - Jul 12, 16:55 UTCJul 12, 17:55 UTC1h 0m
2026-07-12 INV09 - Jul 12, 15:35 UTCJul 12, 16:05 UTC30m
2026-07-12 INV09 - Jul 12, 14:20 UTCJul 12, 15:30 UTC1h 10m
2026-07-11 INV09 - Jul 11, 19:15 UTCJul 11, 20:20 UTC1h 5m
2026-07-10 INV09 - Jul 10, 14:05 UTCJul 10, 14:55 UTC50m
2026-07-10 INV09 - Jul 10, 10:55 UTCJul 10, 12:10 UTC1h 15m
2026-07-09 INV09 - Jul 9, 13:25 UTCJul 9, 14:15 UTC50m
2026-07-09 INV09 - Jul 9, 12:10 UTCJul 9, 12:25 UTC15m
2026-07-09 INV09 RCS → RCS Jul 9, 10:15 UTCJul 9, 11:20 UTC1h 5m
2026-07-09 INV09 - Jul 9, 09:35 UTCJul 9, 09:45 UTC10m
2026-07-08 INV09 - Jul 8, 10:30 UTCJul 8, 12:20 UTC1h 50m
2026-07-06 INV09 - Jul 6, 16:25 UTCJul 6, 16:35 UTC10m
2026-07-06 INV09 - Jul 6, 12:45 UTCJul 6, 12:55 UTC10m
2026-07-06 INV09 - Jul 6, 10:25 UTCJul 6, 11:35 UTC1h 10m
2026-07-04 INV09 - Jul 4, 12:00 UTCJul 4, 12:35 UTC35m
2026-07-03 INV09 - Jul 3, 15:25 UTCJul 3, 15:50 UTC25m
2026-07-03 INV09 - Jul 3, 13:05 UTCJul 3, 13:25 UTC20m
2026-07-03 INV09 - Jul 3, 12:05 UTCJul 3, 12:15 UTC10m
2026-07-03 INV09 - Jul 3, 08:10 UTCJul 3, 08:55 UTC45m
2026-07-01 INV09 - Jul 1, 18:45 UTCJul 1, 19:35 UTC50m
2026-07-01 INV09 - Jul 1, 15:20 UTCJul 1, 15:30 UTC10m
2026-07-01 INV09 - Jul 1, 10:05 UTCJul 1, 10:50 UTC45m
2026-06-28 INV09 - Jun 28, 13:55 UTCJun 28, 14:50 UTC55m
2026-06-28 INV09 - Jun 28, 12:09 UTCJun 28, 13:04 UTC55m
2026-06-28 INV09 - Jun 28, 09:45 UTCJun 28, 10:30 UTC45m
2026-06-27 INV09 - Jun 27, 07:55 UTCJun 27, 08:39 UTC45m
2026-06-25 INV09 - Jun 25, 10:15 UTCJun 25, 11:04 UTC50m
2026-06-22 INV09 - Jun 22, 15:40 UTCJun 22, 15:50 UTC10m
2026-06-22 INV09 - Jun 22, 13:44 UTCJun 22, 13:54 UTC10m
2026-06-21 INV09 - Jun 21, 13:59 UTCJun 21, 14:40 UTC40m
2026-06-21 INV09 - Jun 21, 07:00 UTCJun 21, 07:14 UTC15m
2026-06-21 INV09 - Jun 21, 03:30 UTCJun 21, 05:04 UTC1h 35m
2026-06-20 INV09 - Jun 20, 10:09 UTCJun 20, 10:25 UTC15m
2026-06-19 INV09 - Jun 19, 16:49 UTCJun 19, 17:24 UTC35m
2026-06-19 INV09 - Jun 19, 14:34 UTCJun 19, 14:59 UTC25m
2026-06-19 INV09 - Jun 19, 10:24 UTCJun 19, 10:59 UTC35m
2026-06-18 INV09 - Jun 18, 19:35 UTCJun 18, 20:35 UTC1h 0m
2026-06-18 INV09 - Jun 18, 16:45 UTCJun 18, 18:00 UTC1h 15m
2026-06-16 INV09 - Jun 16, 17:49 UTCJun 16, 18:05 UTC15m
2026-06-16 INV09 - Jun 16, 14:15 UTCJun 16, 14:35 UTC20m
2026-06-16 INV09 - Jun 16, 13:15 UTCJun 16, 13:30 UTC15m
2026-06-15 INV09 - Jun 15, 17:34 UTCJun 15, 17:50 UTC15m
2026-06-15 INV09 - Jun 15, 14:20 UTCJun 15, 15:19 UTC1h 0m
2026-06-15 INV09 - Jun 15, 10:50 UTCJun 15, 11:45 UTC55m
2026-06-14 INV09 - Jun 14, 11:55 UTCJun 14, 12:45 UTC50m

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

Mode-S 404B1C frequently asked

What is Mode-S code 404B1C?
404B1C is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-CCTH.
Where is Mode-S 404B1C registered?
Mode-S code 404B1C 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 404B1C broadcasting right now?
No active broadcast right now. Last signal was 10h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 404B1C, octal 20045434, decimal 4,213,532.
What flights does 404B1C operate?
Mode-S 404B1C has broadcast 1 distinct callsign, including INV09.