sensors Mode-S transponder

4CADC7

ICAO 24-bit transponder address · allocated to Ireland

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

Hex
4CADC7
Octal
23126707
Decimal
5,025,223
Country
IE
Tail
EI-HJO
Type
A339
No current signal · last broadcast 20h ago
Flights observed
6
Distinct callsigns
2
Country
IE
Last broadcast
20h ago

Last known position

Most recent position reported by Mode-S 4CADC7.

Country allocation

The ICAO 24-bit address 4CADC7 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 2 distinct

Callsign Airline Flights Last seen
ITY6KC ITA Airways 4 2026-04-13
ITY602 - 2 2026-04-14

Recent flights last 6

DateFlightRouteTakeoffLandingDuration
2026-04-14 ITY602 - Apr 14, 09:10 UTCApr 14, 11:05 UTC1h 55m
2026-04-14 ITY602 - Apr 14, 08:20 UTCApr 14, 09:05 UTC45m
2026-04-13 ITY6KC JFK → FCO Apr 13, 08:20 UTCApr 13, 09:30 UTC1h 10m
2026-04-13 ITY6KC JFK → FCO Apr 13, 07:55 UTCApr 13, 09:30 UTC1h 35m
2026-04-13 ITY6KC JFK → FCO Apr 13, 06:45 UTCApr 13, 08:15 UTC1h 30m
2026-04-13 ITY6KC JFK → FCO Apr 13, 01:45 UTCApr 13, 03:30 UTC1h 45m

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

Mode-S 4CADC7 frequently asked

What is Mode-S code 4CADC7?
4CADC7 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-HJO.
Where is Mode-S 4CADC7 registered?
Mode-S code 4CADC7 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CADC7 broadcasting right now?
No active broadcast right now. Last signal was 20h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CADC7, octal 23126707, decimal 5,025,223.
What flights does 4CADC7 operate?
Mode-S 4CADC7 has broadcast 2 distinct callsigns, including ITY6KC, ITY602.