sensors Mode-S transponder

4CADCA

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-HJS · AIRBUS A-330-900

Hex
4CADCA
Octal
23126712
Decimal
5,025,226
Country
IE
Tail
EI-HJS
Type
A339
No current signal · last broadcast 13h ago
Flights observed
11
Distinct callsigns
4
Country
IE
Last broadcast
13h ago

Last known position

Most recent position reported by Mode-S 4CADCA.

Country allocation

The ICAO 24-bit address 4CADCA 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 4 distinct

Callsign Airline Flights Last seen
ITY651 ITA Airways 4 2026-04-13
ITY630 ITA Airways 4 2026-04-13
ITY6MO ITA Airways 2 2026-04-14
ITY650 - 1 2026-04-12

Recent flights last 11

DateFlightRouteTakeoffLandingDuration
2026-04-14 ITY6MO MIA → FCO Apr 14, 09:10 UTCApr 14, 09:35 UTC25m
2026-04-14 ITY6MO MIA → FCO Apr 14, 07:30 UTCApr 14, 09:05 UTC1h 35m
2026-04-13 ITY630 FCO → MIA Apr 13, 19:50 UTCApr 13, 20:25 UTC35m
2026-04-13 ITY630 FCO → MIA Apr 13, 19:35 UTCApr 13, 19:45 UTC10m
2026-04-13 ITY630 FCO → MIA Apr 13, 11:55 UTCApr 13, 12:25 UTC30m
2026-04-13 ITY630 FCO → MIA Apr 13, 09:30 UTCApr 13, 12:15 UTC2h 45m
2026-04-13 ITY651 YYZ → FCO Apr 13, 04:20 UTCApr 13, 06:15 UTC1h 55m
2026-04-13 ITY651 YYZ → FCO Apr 13, 03:55 UTCApr 13, 06:15 UTC2h 20m
2026-04-13 ITY651 YYZ → FCO Apr 13, 00:20 UTCApr 13, 04:15 UTC3h 55m
2026-04-12 ITY651 YYZ → FCO Apr 12, 23:55 UTCApr 13, 00:20 UTC25m
2026-04-12 ITY650 - Apr 12, 18:15 UTCApr 12, 19:35 UTC1h 20m

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

Mode-S 4CADCA frequently asked

What is Mode-S code 4CADCA?
4CADCA is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-HJS.
Where is Mode-S 4CADCA registered?
Mode-S code 4CADCA is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CADCA broadcasting right now?
No active broadcast right now. Last signal was 13h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CADCA, octal 23126712, decimal 5,025,226.
What flights does 4CADCA operate?
Mode-S 4CADCA has broadcast 4 distinct callsigns, including ITY651, ITY630, ITY6MO, ITY650.