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sensors Mode-S transponder

404E46

ICAO 24-bit transponder address · allocated to United Kingdom

Currently assigned to G-CDMX · PIPER PA-28-140/150/160/180

Hex
404E46
Octal
20047106
Decimal
4,214,342
Country
GB
Tail
G-CDMX
Type
P28A
No current signal · last broadcast 8d ago
Flights observed
145
Distinct callsigns
1
Country
GB
Last broadcast
8d ago

Last known position

Most recent position reported by Mode-S 404E46.

Country allocation

The ICAO 24-bit address 404E46 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
GCDMX - 145 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 GCDMX - Jul 23, 12:35 UTCJul 23, 14:40 UTC2h 5m
2026-07-23 GCDMX - Jul 23, 09:35 UTCJul 23, 11:15 UTC1h 40m
2026-07-22 GCDMX - Jul 22, 14:30 UTCJul 22, 15:20 UTC50m
2026-07-22 GCDMX - Jul 22, 12:15 UTCJul 22, 12:50 UTC35m
2026-07-19 GCDMX - Jul 19, 12:55 UTCJul 19, 13:35 UTC40m
2026-07-19 GCDMX - Jul 19, 11:25 UTCJul 19, 12:05 UTC40m
2026-07-19 GCDMX - Jul 19, 09:10 UTCJul 19, 09:55 UTC45m
2026-07-18 GCDMX GLO → GLO Jul 18, 14:35 UTCJul 18, 14:55 UTC20m
2026-07-18 GCDMX - Jul 18, 13:15 UTCJul 18, 13:35 UTC20m
2026-07-18 GCDMX - Jul 18, 11:20 UTCJul 18, 12:00 UTC40m
2026-07-18 GCDMX GLO → GLO Jul 18, 09:10 UTCJul 18, 09:55 UTC45m
2026-07-17 GCDMX GLO → GLO Jul 17, 13:10 UTCJul 17, 13:55 UTC45m
2026-07-17 GCDMX - Jul 17, 11:10 UTCJul 17, 11:50 UTC40m
2026-07-17 GCDMX - Jul 17, 09:15 UTCJul 17, 10:00 UTC45m
2026-07-16 GCDMX GLO → GLO Jul 16, 14:29 UTCJul 16, 14:55 UTC25m
2026-07-16 GCDMX - Jul 16, 10:29 UTCJul 16, 11:05 UTC35m
2026-07-16 GCDMX - Jul 16, 09:30 UTCJul 16, 09:45 UTC15m
2026-07-15 GCDMX - Jul 15, 14:35 UTCJul 15, 15:30 UTC55m
2026-07-15 GCDMX - Jul 15, 12:20 UTCJul 15, 13:10 UTC50m
2026-07-15 GCDMX - Jul 15, 10:10 UTCJul 15, 10:45 UTC35m
2026-07-14 GCDMX - Jul 14, 14:05 UTCJul 14, 15:50 UTC1h 45m
2026-07-14 GCDMX - Jul 14, 12:40 UTCJul 14, 13:20 UTC40m
2026-07-14 GCDMX GLO → GLO Jul 14, 10:25 UTCJul 14, 11:05 UTC40m
2026-07-14 GCDMX - Jul 14, 08:35 UTCJul 14, 09:25 UTC50m
2026-07-13 GCDMX GLO → GLO Jul 13, 13:35 UTCJul 13, 14:20 UTC45m
2026-07-13 GCDMX - Jul 13, 11:55 UTCJul 13, 12:30 UTC35m
2026-07-13 GCDMX GLO → GLO Jul 13, 09:30 UTCJul 13, 10:10 UTC40m
2026-07-12 GCDMX - Jul 12, 14:30 UTCJul 12, 14:45 UTC15m
2026-07-12 GCDMX - Jul 12, 13:25 UTCJul 12, 13:40 UTC15m
2026-07-12 GCDMX - Jul 12, 11:15 UTCJul 12, 12:05 UTC50m
2026-07-12 GCDMX GLO → GLO Jul 12, 09:05 UTCJul 12, 09:50 UTC45m
2026-07-11 GCDMX GLO → GLO Jul 11, 13:15 UTCJul 11, 14:00 UTC45m
2026-07-11 GCDMX GLO → GLO Jul 11, 11:05 UTCJul 11, 11:50 UTC45m
2026-07-11 GCDMX GLO → GLO Jul 11, 09:15 UTCJul 11, 10:05 UTC50m
2026-07-10 GCDMX GLO → GLO Jul 10, 13:25 UTCJul 10, 14:10 UTC45m
2026-07-10 GCDMX - Jul 10, 12:05 UTCJul 10, 12:20 UTC15m
2026-07-10 GCDMX - Jul 10, 09:20 UTCJul 10, 10:00 UTC40m
2026-07-09 GCDMX - Jul 9, 12:50 UTCJul 9, 13:35 UTC45m
2026-07-09 GCDMX GLO → GLO Jul 9, 11:00 UTCJul 9, 11:40 UTC40m
2026-07-09 GCDMX - Jul 9, 09:10 UTCJul 9, 09:25 UTC15m
2026-07-08 GCDMX GLO → GLO Jul 8, 13:05 UTCJul 8, 13:45 UTC40m
2026-07-08 GCDMX - Jul 8, 10:20 UTCJul 8, 11:15 UTC55m
2026-07-07 GCDMX - Jul 7, 11:30 UTCJul 7, 12:05 UTC35m
2026-07-07 GCDMX - Jul 7, 09:45 UTCJul 7, 10:20 UTC35m
2026-07-06 GCDMX GLO → GLO Jul 6, 14:40 UTCJul 6, 15:30 UTC50m
2026-07-02 GCDMX - Jul 2, 13:45 UTCJul 2, 14:10 UTC25m
2026-07-02 GCDMX GLO → GLO Jul 2, 09:10 UTCJul 2, 10:05 UTC55m
2026-07-01 GCDMX GLO → GLO Jul 1, 12:55 UTCJul 1, 13:50 UTC55m
2026-07-01 GCDMX - Jul 1, 09:40 UTCJul 1, 10:30 UTC50m
2026-06-30 GCDMX GLO → GLO Jun 30, 14:25 UTCJun 30, 15:05 UTC40m

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

Mode-S 404E46 frequently asked

What is Mode-S code 404E46?
404E46 is an ICAO 24-bit transponder address. Allocated to United Kingdom. Assigned to G-CDMX.
Where is Mode-S 404E46 registered?
Mode-S code 404E46 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 404E46 broadcasting right now?
No active broadcast right now. Last signal was 8d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 404E46, octal 20047106, decimal 4,214,342.
What flights does 404E46 operate?
Mode-S 404E46 has broadcast 1 distinct callsign, including GCDMX.