sensors Mode-S transponder

4CAE19

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-HXC · AIRBUS A-321neo

Hex
4CAE19
Octal
23127031
Decimal
5,025,305
Country
IE
Tail
EI-HXC
Type
A21N
No current signal · last broadcast 12h ago
Flights observed
15
Distinct callsigns
9
Country
IE
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S 4CAE19.

Country allocation

The ICAO 24-bit address 4CAE19 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
ITY855 - 4 2026-04-13
ITY108 ITA Airways 3 2026-04-13
ITY107 - 2 2026-04-13
ITY894 - 1 2026-04-13
ITY864 ITA Airways 1 2026-04-14
ITY863 - 1 2026-04-14
ITY854 - 1 2026-04-12
ITY721 - 1 2026-04-13
ITY718 - 1 2026-04-13

Recent flights last 15

DateFlightRouteTakeoffLandingDuration
2026-04-14 ITY863 - Apr 14, 10:10 UTCApr 14, 10:55 UTC45m
2026-04-14 ITY864 FCO → TUN Apr 14, 07:45 UTCApr 14, 08:25 UTC40m
2026-04-13 ITY894 - Apr 13, 20:35 UTCApr 13, 23:05 UTC2h 30m
2026-04-13 ITY721 ATH → FCO Apr 13, 16:50 UTCApr 13, 18:35 UTC1h 45m
2026-04-13 ITY718 - Apr 13, 14:15 UTCApr 13, 15:45 UTC1h 30m
2026-04-13 ITY107 - Apr 13, 11:55 UTCApr 13, 12:15 UTC20m
2026-04-13 ITY107 - Apr 13, 10:10 UTCApr 13, 12:15 UTC2h 5m
2026-04-13 ITY108 FCO → AMS Apr 13, 08:20 UTCApr 13, 08:50 UTC30m
2026-04-13 ITY108 FCO → AMS Apr 13, 07:55 UTCApr 13, 08:50 UTC55m
2026-04-13 ITY108 FCO → AMS Apr 13, 07:05 UTCApr 13, 08:15 UTC1h 10m
2026-04-13 ITY855 - Apr 13, 04:20 UTCApr 13, 05:00 UTC40m
2026-04-13 ITY855 - Apr 13, 03:55 UTCApr 13, 05:00 UTC1h 5m
2026-04-13 ITY855 - Apr 13, 02:45 UTCApr 13, 04:15 UTC1h 30m
2026-04-12 ITY855 - Apr 12, 23:55 UTCApr 13, 00:10 UTC15m
2026-04-12 ITY854 - Apr 12, 18:45 UTCApr 12, 19:15 UTC30m

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

Mode-S 4CAE19 frequently asked

What is Mode-S code 4CAE19?
4CAE19 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-HXC.
Where is Mode-S 4CAE19 registered?
Mode-S code 4CAE19 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAE19 broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAE19, octal 23127031, decimal 5,025,305.
What flights does 4CAE19 operate?
Mode-S 4CAE19 has broadcast 9 distinct callsigns, including ITY855, ITY108, ITY107, ITY894, ITY864.