Apparatus

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sensors Mode-S transponder

4CAEB3

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-TYD · AIRBUS A-330-900

Hex
4CAEB3
Octal
23127263
Decimal
5,025,459
Country
IE
Tail
EI-TYD
Type
A339
No current signal · last broadcast 21h ago
Flights observed
6
Distinct callsigns
3
Country
IE
Last broadcast
21h ago

Last known position

Most recent position reported by Mode-S 4CAEB3.

Country allocation

The ICAO 24-bit address 4CAEB3 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 3 distinct

Callsign Airline Flights Last seen
ITY6MO ITA Airways 4 2026-04-13
ITY630 ITA Airways 1 2026-04-12
ITY614 - 1 2026-04-14

Recent flights last 6

DateFlightRouteTakeoffLandingDuration
2026-04-14 ITY614 - Apr 14, 09:10 UTCApr 14, 11:05 UTC1h 55m
2026-04-13 ITY6MO MIA → FCO Apr 13, 08:20 UTCApr 13, 09:15 UTC55m
2026-04-13 ITY6MO MIA → FCO Apr 13, 07:55 UTCApr 13, 09:15 UTC1h 20m
2026-04-13 ITY6MO MIA → FCO Apr 13, 06:50 UTCApr 13, 08:15 UTC1h 25m
2026-04-13 ITY6MO MIA → FCO Apr 13, 00:00 UTCApr 13, 00:25 UTC25m
2026-04-12 ITY630 FCO → MIA Apr 12, 19:25 UTCApr 12, 20:10 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-TYD page for operator, model, and routing details .

Mode-S 4CAEB3 frequently asked

What is Mode-S code 4CAEB3?
4CAEB3 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-TYD.
Where is Mode-S 4CAEB3 registered?
Mode-S code 4CAEB3 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAEB3 broadcasting right now?
No active broadcast right now. Last signal was 21h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAEB3, octal 23127263, decimal 5,025,459.
What flights does 4CAEB3 operate?
Mode-S 4CAEB3 has broadcast 3 distinct callsigns, including ITY6MO, ITY630, ITY614.