sensors Mode-S transponder

4CAEFA

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-MVA · AIRBUS A220-100

Hex
4CAEFA
Octal
23127372
Decimal
5,025,530
Country
IE
Tail
EI-MVA
Type
BCS1
No current signal · last broadcast 12h ago
Flights observed
17
Distinct callsigns
13
Country
IE
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S 4CAEFA.

Country allocation

The ICAO 24-bit address 4CAEFA 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 13 distinct

Callsign Airline Flights Last seen
ITY451 ITA Airways 2 2026-04-13
ITY350 ITA Airways 2 2026-04-14
ITY1297 - 2 2026-04-13
ITY1271 - 2 2026-04-13
ITY450 ITA Airways 1 2026-04-13
ITY351 - 1 2026-04-14
ITY220 - 1 2026-04-12
ITY219 - 1 2026-04-12
ITY2045 - 1 2026-04-13
ITY1365 - 1 2026-04-13
ITY1360 - 1 2026-04-13
ITY1282 - 1 2026-04-13
ITY1278 - 1 2026-04-14

Recent flights last 17

DateFlightRouteTakeoffLandingDuration
2026-04-14 ITY351 - Apr 14, 09:10 UTCApr 14, 10:15 UTC1h 5m
2026-04-14 ITY350 LIN → ORY Apr 14, 07:10 UTCApr 14, 07:50 UTC40m
2026-04-14 ITY350 LIN → ORY Apr 14, 06:45 UTCApr 14, 07:10 UTC25m
2026-04-14 ITY1278 - Apr 14, 05:15 UTCApr 14, 05:40 UTC25m
2026-04-13 ITY1297 - Apr 13, 19:50 UTCApr 13, 20:25 UTC35m
2026-04-13 ITY1297 - Apr 13, 19:35 UTCApr 13, 20:10 UTC35m
2026-04-13 ITY1282 - Apr 13, 17:40 UTCApr 13, 18:30 UTC50m
2026-04-13 ITY1271 - Apr 13, 16:15 UTCApr 13, 16:30 UTC15m
2026-04-13 ITY1271 - Apr 13, 16:05 UTCApr 13, 16:15 UTC10m
2026-04-13 ITY1360 - Apr 13, 13:55 UTCApr 13, 14:40 UTC45m
2026-04-13 ITY1365 - Apr 13, 12:20 UTCApr 13, 13:00 UTC40m
2026-04-13 ITY2045 - Apr 13, 09:45 UTCApr 13, 10:35 UTC50m
2026-04-13 ITY451 MUC → LIN Apr 13, 08:20 UTCApr 13, 08:40 UTC20m
2026-04-13 ITY451 MUC → LIN Apr 13, 07:50 UTCApr 13, 08:15 UTC25m
2026-04-13 ITY450 LIN → MUC Apr 13, 05:55 UTCApr 13, 06:35 UTC40m
2026-04-12 ITY219 LCY → LIN Apr 12, 18:45 UTCApr 12, 20:15 UTC1h 30m
2026-04-12 ITY220 - Apr 12, 17:15 UTCApr 12, 18:00 UTC45m

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

Mode-S 4CAEFA frequently asked

What is Mode-S code 4CAEFA?
4CAEFA is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-MVA.
Where is Mode-S 4CAEFA registered?
Mode-S code 4CAEFA is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAEFA 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 4CAEFA, octal 23127372, decimal 5,025,530.
What flights does 4CAEFA operate?
Mode-S 4CAEFA has broadcast 13 distinct callsigns, including ITY451, ITY350, ITY1297, ITY1271, ITY450.