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sensors Mode-S transponder

4CA90A

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-EIE · AIRBUS A-320

Hex
4CA90A
Octal
23124412
Decimal
5,024,010
Country
IE
Tail
EI-EIE
Type
A320
No current signal · last broadcast Jul 24, 20:05 UTC
Flights observed
135
Distinct callsigns
20
Country
IE
Last broadcast
Jul 24, 20:05 UTC

Last known position

Most recent position reported by Mode-S 4CA90A.

Country allocation

The ICAO 24-bit address 4CA90A 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 20 distinct

Callsign Airline Flights Last seen
ITY1569 ITA Airways 4 2026-07-22
ITY1566 ITA Airways 4 2026-07-21
ITY1604 - 3 2026-07-18
ITY1601 ITA Airways 3 2026-07-18
ITY885 - 2 2026-07-20
ITY884 - 2 2026-07-20
ITY864 - 2 2026-07-17
ITY863 - 2 2026-07-17
ITY803 - 2 2026-07-14
ITY802 - 2 2026-07-13
ITY801 - 2 2026-07-11
ITY8007 - 2 2026-06-30
ITY800 - 2 2026-07-11
ITY716 - 2 2026-07-08
ITY715 - 2 2026-07-08
ITY427 - 2 2026-07-21
ITY426 ITA Airways 2 2026-07-21
ITY3LO - 2 2026-07-14
ITY353 - 2 2026-07-14
ITY333 ITA Airways 2 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 ITY332 FCO → CDG Jul 24, 19:40 UTCJul 24, 20:05 UTC25m
2026-07-24 ITY9741 HAM → FCO Jul 24, 13:10 UTCJul 24, 14:50 UTC1h 40m
2026-07-24 ITY9740 - Jul 24, 10:00 UTCJul 24, 12:05 UTC2h 5m
2026-07-24 ITY1728 CTA → FCO Jul 24, 06:25 UTCJul 24, 07:25 UTC1h 0m
2026-07-23 ITY1729 - Jul 23, 19:10 UTCJul 23, 19:50 UTC40m
2026-07-23 ITY095 - Jul 23, 15:55 UTCJul 23, 17:25 UTC1h 30m
2026-07-23 ITY094 FCO → VLC Jul 23, 13:10 UTCJul 23, 14:55 UTC1h 45m
2026-07-23 ITY343 NCE → FCO Jul 23, 10:20 UTCJul 23, 11:05 UTC45m
2026-07-23 ITY348 FCO → NCE Jul 23, 08:00 UTCJul 23, 08:55 UTC55m
2026-07-23 ITY1PR NAP → FCO Jul 23, 04:45 UTCJul 23, 05:15 UTC30m
2026-07-22 ITY1267 FCO → NAP Jul 22, 20:20 UTCJul 22, 20:55 UTC35m
2026-07-22 ITY573 ZRH → FCO Jul 22, 17:45 UTCJul 22, 18:50 UTC1h 5m
2026-07-22 ITY574 - Jul 22, 15:25 UTCJul 22, 16:35 UTC1h 10m
2026-07-22 ITY333 CDG → FCO Jul 22, 12:40 UTCJul 22, 14:10 UTC1h 30m
2026-07-22 ITY318 FCO → CDG Jul 22, 11:10 UTCJul 22, 11:20 UTC10m
2026-07-22 ITY1569 AHO → LIN Jul 22, 05:05 UTCJul 22, 10:25 UTC5h 20m
2026-07-21 ITY1566 LIN → AHO Jul 21, 20:10 UTCJul 21, 21:05 UTC55m
2026-07-21 ITY1632 - Jul 21, 17:25 UTCJul 21, 18:45 UTC1h 20m
2026-07-21 ITY1647 LIN → BRI Jul 21, 15:10 UTCJul 21, 16:20 UTC1h 10m
2026-07-21 ITY427 HAM → LIN Jul 21, 12:40 UTCJul 21, 14:00 UTC1h 20m
2026-07-21 ITY426 LIN → HAM Jul 21, 10:00 UTCJul 21, 11:25 UTC1h 25m
2026-07-21 ITY2028 FCO → LIN Jul 21, 07:25 UTCJul 21, 08:15 UTC50m
2026-07-21 ITY341 NCE → FCO Jul 21, 05:15 UTCJul 21, 06:05 UTC50m
2026-07-20 ITY340 - Jul 20, 20:20 UTCJul 20, 21:10 UTC50m
2026-07-20 ITY885 MLA → FCO Jul 20, 17:30 UTCJul 20, 18:40 UTC1h 10m
2026-07-20 ITY884 - Jul 20, 15:40 UTCJul 20, 16:40 UTC1h 0m
2026-07-20 ITY333 CDG → FCO Jul 20, 12:45 UTCJul 20, 14:20 UTC1h 35m
2026-07-20 ITY318 FCO → CDG Jul 20, 09:35 UTCJul 20, 11:30 UTC1h 55m
2026-07-20 ITY2029 - Jul 20, 07:25 UTCJul 20, 08:15 UTC50m
2026-07-19 ITY067 LIN → IBZ Jul 19, 10:25 UTCJul 19, 11:55 UTC1h 30m
2026-07-19 ITY067 LIN → IBZ Jul 19, 08:25 UTCJul 19, 09:05 UTC40m
2026-07-19 ITY066 IBZ → LIN Jul 19, 05:35 UTCJul 19, 07:15 UTC1h 40m
2026-07-18 ITY1601 AHO → LIN Jul 18, 19:55 UTCJul 18, 20:55 UTC1h 0m
2026-07-18 ITY1604 LIN → AHO Jul 18, 18:10 UTCJul 18, 19:05 UTC55m
2026-07-18 ITY1184 - Jul 18, 15:30 UTCJul 18, 16:50 UTC1h 20m
2026-07-18 ITY1185 - Jul 18, 13:10 UTCJul 18, 14:20 UTC1h 10m
2026-07-18 ITY1718 - Jul 18, 10:10 UTCJul 18, 11:40 UTC1h 30m
2026-07-18 ITY1727 LIN → CTA Jul 18, 07:20 UTCJul 18, 08:40 UTC1h 20m
2026-07-18 ITY1569 AHO → LIN Jul 18, 04:55 UTCJul 18, 05:50 UTC55m
2026-07-17 ITY1566 LIN → AHO Jul 17, 20:44 UTCJul 17, 21:44 UTC1h 0m
2026-07-17 ITY2114 - Jul 17, 18:34 UTCJul 17, 19:20 UTC45m
2026-07-17 ITY089 - Jul 17, 15:15 UTCJul 17, 16:24 UTC1h 10m
2026-07-17 ITY088 - Jul 17, 12:45 UTCJul 17, 14:04 UTC1h 20m
2026-07-17 ITY863 - Jul 17, 09:40 UTCJul 17, 10:25 UTC45m
2026-07-17 ITY864 - Jul 17, 07:35 UTCJul 17, 08:15 UTC40m
2026-07-17 ITY317 - Jul 17, 04:20 UTCJul 17, 05:55 UTC1h 35m
2026-07-16 ITY332 - Jul 16, 19:55 UTCJul 16, 21:35 UTC1h 40m
2026-07-16 ITY095 - Jul 16, 16:19 UTCJul 16, 17:45 UTC1h 25m
2026-07-16 ITY094 FCO → VLC Jul 16, 13:20 UTCJul 16, 15:00 UTC1h 40m
2026-07-16 ITY863 - Jul 16, 10:04 UTCJul 16, 10:59 UTC55m

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

Mode-S 4CA90A frequently asked

What is Mode-S code 4CA90A?
4CA90A is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-EIE.
Where is Mode-S 4CA90A registered?
Mode-S code 4CA90A is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CA90A broadcasting right now?
No active broadcast right now. Last signal was Jul 24, 20:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CA90A, octal 23124412, decimal 5,024,010.
What flights does 4CA90A operate?
Mode-S 4CA90A has broadcast 20 distinct callsigns, including ITY1569, ITY1566, ITY1604, ITY1601, ITY885.