sensors Mode-S transponder

4CAD10

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-HGX · BOEING 737 MAX 8

Hex
4CAD10
Octal
23126420
Decimal
5,025,040
Country
IE
Tail
EI-HGX
Type
B38M
No current signal · last broadcast 19h ago
Flights observed
17
Distinct callsigns
9
Country
IE
Last broadcast
19h ago

Last known position

Most recent position reported by Mode-S 4CAD10.

Country allocation

The ICAO 24-bit address 4CAD10 falls within the block assigned to Ireland (IE) by ICAO Annex 10, Volume III. Every aircraft registered in Ireland 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 9 distinct

Callsign Airline Flights Last seen
RYR757B - 3 2026-04-13
RYR5VG Ryanair 3 2026-04-13
RYR55FV - 3 2026-04-13
RYR3FB - 2 2026-04-13
RYR18AN - 2 2026-04-14
RYR7573 - 1 2026-04-13
RYR378Z - 1 2026-04-13
RYR2LR - 1 2026-04-13
RYR28UM - 1 2026-04-12

Recent flights last 17

DateFlightRouteTakeoffLandingDuration
2026-04-14 RYR18AN - Apr 14, 07:10 UTCApr 14, 08:35 UTC1h 25m
2026-04-14 RYR18AN - Apr 14, 06:10 UTCApr 14, 07:10 UTC1h 0m
2026-04-13 RYR378Z - Apr 13, 20:00 UTCApr 13, 20:10 UTC10m
2026-04-13 RYR2LR - Apr 13, 18:25 UTCApr 13, 19:05 UTC40m
2026-04-13 RYR55FV - Apr 13, 16:15 UTCApr 13, 17:35 UTC1h 20m
2026-04-13 RYR55FV - Apr 13, 15:50 UTCApr 13, 17:35 UTC1h 45m
2026-04-13 RYR55FV - Apr 13, 15:20 UTCApr 13, 16:15 UTC55m
2026-04-13 RYR757B - Apr 13, 12:20 UTCApr 13, 13:25 UTC1h 5m
2026-04-13 RYR757B - Apr 13, 11:55 UTCApr 13, 13:25 UTC1h 30m
2026-04-13 RYR757B - Apr 13, 10:55 UTCApr 13, 12:15 UTC1h 20m
2026-04-13 RYR5VG ALC → PIK Apr 13, 08:20 UTCApr 13, 10:10 UTC1h 50m
2026-04-13 RYR5VG ALC → PIK Apr 13, 07:55 UTCApr 13, 10:10 UTC2h 15m
2026-04-13 RYR5VG ALC → PIK Apr 13, 07:15 UTCApr 13, 08:15 UTC1h 0m
2026-04-13 RYR7573 - Apr 13, 05:30 UTCApr 13, 05:55 UTC25m
2026-04-13 RYR3FB - Apr 13, 04:20 UTCApr 13, 04:30 UTC10m
2026-04-13 RYR3FB - Apr 13, 04:10 UTCApr 13, 04:15 UTC5m
2026-04-12 RYR28UM - Apr 12, 17:15 UTCApr 12, 19:25 UTC2h 10m

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 EI-HGX page for operator, model, and routing details .

Mode-S 4CAD10 frequently asked

What is Mode-S code 4CAD10?
4CAD10 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-HGX.
Where is Mode-S 4CAD10 registered?
Mode-S code 4CAD10 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAD10 broadcasting right now?
No active broadcast right now. Last signal was 19h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAD10, octal 23126420, decimal 5,025,040.
What flights does 4CAD10 operate?
Mode-S 4CAD10 has broadcast 9 distinct callsigns, including RYR757B, RYR5VG, RYR55FV, RYR3FB, RYR18AN.