sensors Mode-S transponder

4CAEFB

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-MVB · AIRBUS A220-100

Hex
4CAEFB
Octal
23127373
Decimal
5,025,531
Country
IE
Tail
EI-MVB
Type
BCS1
No current signal · last broadcast 16h ago
Flights observed
12
Distinct callsigns
9
Country
IE
Last broadcast
16h ago

Last known position

Most recent position reported by Mode-S 4CAEFB.

Country allocation

The ICAO 24-bit address 4CAEFB 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
ITY1787 - 2 2026-04-13
ITY113 - 2 2026-04-13
ITY112 - 2 2026-04-13
ITY358 - 1 2026-04-12
ITY311 - 1 2026-04-12
ITY305 - 1 2026-04-13
ITY300 ITA Airways 1 2026-04-13
ITY2055 ITA Airways 1 2026-04-14
ITY1786 - 1 2026-04-13

Recent flights last 12

DateFlightRouteTakeoffLandingDuration
2026-04-14 ITY2055 LIN → FCO Apr 14, 05:45 UTCApr 14, 06:35 UTC50m
2026-04-13 ITY113 - Apr 13, 19:45 UTCApr 13, 19:55 UTC10m
2026-04-13 ITY113 AMS → LIN Apr 13, 18:30 UTCApr 13, 19:55 UTC1h 25m
2026-04-13 ITY112 - Apr 13, 16:15 UTCApr 13, 17:20 UTC1h 5m
2026-04-13 ITY112 - Apr 13, 15:55 UTCApr 13, 16:15 UTC20m
2026-04-13 ITY1786 - Apr 13, 13:45 UTCApr 13, 14:55 UTC1h 10m
2026-04-13 ITY1787 - Apr 13, 11:55 UTCApr 13, 12:25 UTC30m
2026-04-13 ITY1787 - Apr 13, 11:05 UTCApr 13, 12:15 UTC1h 10m
2026-04-13 ITY305 - Apr 13, 08:20 UTCApr 13, 09:30 UTC1h 10m
2026-04-13 ITY300 LIN → CDG Apr 13, 05:30 UTCApr 13, 06:30 UTC1h 0m
2026-04-12 ITY311 - Apr 12, 19:45 UTCApr 12, 20:15 UTC30m
2026-04-12 ITY358 LIN → CDG Apr 12, 17:20 UTCApr 12, 18:30 UTC1h 10m

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

Mode-S 4CAEFB frequently asked

What is Mode-S code 4CAEFB?
4CAEFB is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-MVB.
Where is Mode-S 4CAEFB registered?
Mode-S code 4CAEFB is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAEFB broadcasting right now?
No active broadcast right now. Last signal was 16h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAEFB, octal 23127373, decimal 5,025,531.
What flights does 4CAEFB operate?
Mode-S 4CAEFB has broadcast 9 distinct callsigns, including ITY1787, ITY113, ITY112, ITY358, ITY311.