Apparatus

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sensors Mode-S transponder

4CAEFF

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-MVF · AIRBUS A220-100

Hex
4CAEFF
Octal
23127377
Decimal
5,025,535
Country
IE
Tail
EI-MVF
Type
BCS1
No current signal · last broadcast Apr 22, 18:20 UTC
Flights observed
74
Distinct callsigns
20
Country
IE
Last broadcast
Apr 22, 18:20 UTC

Last known position

Most recent position reported by Mode-S 4CAEFF.

Country allocation

The ICAO 24-bit address 4CAEFF 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
ITY221 ITA Airways 5 2026-04-20
ITY218 ITA Airways 5 2026-04-20
ITY1773 ITA Airways 5 2026-04-17
ITY1278 ITA Airways 5 2026-04-17
ITY238 - 3 2026-04-20
ITY224 ITA Airways 3 2026-04-20
ITY1772 ITA Airways 3 2026-04-17
ITY1185 - 3 2026-04-15
ITY1184 - 3 2026-04-15
ITY247 - 2 2026-04-20
ITY217 ITA Airways 2 2026-04-21
ITY1647 - 2 2026-04-16
ITY1632 - 2 2026-04-16
ITY1392 ITA Airways 2 2026-04-21
ITY1298 ITA Airways 2 2026-04-15
ITY1297 ITA Airways 2 2026-04-16
ITY1291 - 2 2026-04-15
ITY1267 ITA Airways 2 2026-04-21
ITY345 ITA Airways 1 2026-04-22
ITY344 ITA Airways 1 2026-04-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-04-22 ITY1480 VCE → FCO Apr 22, 17:35 UTCApr 22, 18:20 UTC45m
2026-04-22 ITY1467 FCO → VCE Apr 22, 16:00 UTCApr 22, 16:45 UTC45m
2026-04-22 ITY345 NCE → FCO Apr 22, 14:05 UTCApr 22, 14:50 UTC45m
2026-04-22 ITY344 FCO → NCE Apr 22, 11:50 UTCApr 22, 12:45 UTC55m
2026-04-22 ITY1358 TRS → FCO Apr 22, 09:25 UTCApr 22, 10:15 UTC50m
2026-04-22 ITY1357 FCO → TRS Apr 22, 07:40 UTCApr 22, 08:30 UTC50m
2026-04-22 ITY1PR NAP → FCO Apr 22, 04:45 UTCApr 22, 05:15 UTC30m
2026-04-21 ITY1267 FCO → NAP Apr 21, 20:00 UTCApr 21, 20:20 UTC20m
2026-04-21 ITY1392 GOA → FCO Apr 21, 17:45 UTCApr 21, 18:25 UTC40m
2026-04-21 ITY1391 - Apr 21, 15:55 UTCApr 21, 16:40 UTC45m
2026-04-21 ITY1616 - Apr 21, 13:50 UTCApr 21, 14:35 UTC45m
2026-04-21 ITY1613 FCO → BRI Apr 21, 12:05 UTCApr 21, 12:35 UTC30m
2026-04-21 ITY2045 LIN → FCO Apr 21, 09:50 UTCApr 21, 10:40 UTC50m
2026-04-21 ITY217 LCY → LIN Apr 21, 05:55 UTCApr 21, 07:15 UTC1h 20m
2026-04-20 ITY224 LIN → LCY Apr 20, 18:10 UTCApr 20, 19:45 UTC1h 35m
2026-04-20 ITY247 LCY → LIN Apr 20, 15:40 UTCApr 20, 17:00 UTC1h 20m
2026-04-20 ITY238 - Apr 20, 13:15 UTCApr 20, 14:45 UTC1h 30m
2026-04-20 ITY221 LCY → LIN Apr 20, 08:30 UTCApr 20, 10:00 UTC1h 30m
2026-04-20 ITY218 LIN → LCY Apr 20, 05:50 UTCApr 20, 07:30 UTC1h 40m
2026-04-19 ITY153 BRU → LIN Apr 19, 18:20 UTCApr 19, 19:25 UTC1h 5m
2026-04-19 ITY154 LIN → BRU Apr 19, 15:55 UTCApr 19, 17:05 UTC1h 10m
2026-04-19 ITY1786 - Apr 19, 13:25 UTCApr 19, 14:45 UTC1h 20m
2026-04-19 ITY1787 LIN → PMO Apr 19, 11:10 UTCApr 19, 12:15 UTC1h 5m
2026-04-19 ITY2036 FCO → LIN Apr 19, 09:05 UTCApr 19, 09:50 UTC45m
2026-04-19 ITY2021 LIN → FCO Apr 19, 06:15 UTCApr 19, 06:55 UTC40m
2026-04-18 ITY2056 - Apr 18, 17:10 UTCApr 18, 18:00 UTC50m
2026-04-18 ITY2061 - Apr 18, 15:00 UTCApr 18, 15:45 UTC45m
2026-04-18 ITY217 LCY → LIN Apr 18, 05:50 UTCApr 18, 07:20 UTC1h 30m
2026-04-17 ITY224 - Apr 17, 19:25 UTCApr 17, 19:45 UTC20m
2026-04-17 ITY224 - Apr 17, 18:20 UTCApr 17, 19:20 UTC1h 0m
2026-04-17 ITY247 LCY → LIN Apr 17, 15:40 UTCApr 17, 17:10 UTC1h 30m
2026-04-17 ITY238 - Apr 17, 13:20 UTCApr 17, 14:35 UTC1h 15m
2026-04-17 ITY238 - Apr 17, 13:05 UTCApr 17, 13:15 UTC10m
2026-04-17 ITY1772 PMO → LIN Apr 17, 09:40 UTCApr 17, 10:55 UTC1h 15m
2026-04-17 ITY1773 LIN → PMO Apr 17, 07:20 UTCApr 17, 07:55 UTC35m
2026-04-17 ITY1773 LIN → PMO Apr 17, 06:40 UTCApr 17, 07:15 UTC35m
2026-04-17 ITY1278 NAP → LIN Apr 17, 05:20 UTCApr 17, 05:35 UTC15m
2026-04-17 ITY1278 NAP → LIN Apr 17, 04:35 UTCApr 17, 05:15 UTC40m
2026-04-16 ITY1297 LIN → NAP Apr 16, 19:15 UTCApr 16, 20:20 UTC1h 5m
2026-04-16 ITY1632 - Apr 16, 17:15 UTCApr 16, 18:10 UTC55m
2026-04-16 ITY1632 - Apr 16, 16:55 UTCApr 16, 17:10 UTC15m
2026-04-16 ITY1647 - Apr 16, 15:15 UTCApr 16, 15:35 UTC20m
2026-04-16 ITY1647 - Apr 16, 14:20 UTCApr 16, 15:10 UTC50m
2026-04-16 ITY221 LCY → LIN Apr 16, 09:10 UTCApr 16, 09:45 UTC35m
2026-04-16 ITY221 LCY → LIN Apr 16, 08:15 UTCApr 16, 09:05 UTC50m
2026-04-16 ITY218 LIN → LCY Apr 16, 07:09 UTCApr 16, 07:19 UTC10m
2026-04-16 ITY218 LIN → LCY Apr 16, 05:49 UTCApr 16, 07:05 UTC1h 15m
2026-04-15 ITY1298 NAP → LIN Apr 15, 19:40 UTCApr 15, 20:35 UTC55m
2026-04-15 ITY1291 - Apr 15, 17:40 UTCApr 15, 18:40 UTC1h 0m
2026-04-15 ITY1184 - Apr 15, 15:05 UTCApr 15, 16:25 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-MVF page for operator, model, and routing details .

Mode-S 4CAEFF frequently asked

What is Mode-S code 4CAEFF?
4CAEFF is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-MVF.
Where is Mode-S 4CAEFF registered?
Mode-S code 4CAEFF is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAEFF broadcasting right now?
No active broadcast right now. Last signal was Apr 22, 18:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAEFF, octal 23127377, decimal 5,025,535.
What flights does 4CAEFF operate?
Mode-S 4CAEFF has broadcast 20 distinct callsigns, including ITY221, ITY218, ITY1773, ITY1278, ITY238.