sensors Mode-S transponder

4CAFCA

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-GHA · BOEING 737-400

Hex
4CAFCA
Octal
23127712
Decimal
5,025,738
Country
IE
Tail
EI-GHA
Type
B734
No current signal · last broadcast 1d ago
Flights observed
5
Distinct callsigns
5
Country
IE
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 4CAFCA.

Country allocation

The ICAO 24-bit address 4CAFCA 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 5 distinct

Callsign Airline Flights Last seen
MSA976P - 1 2026-04-13
MSA91C - 1 2026-04-13
MSA86E - 1 2026-04-12
MSA79F Mistral Air 1 2026-04-13
MSA56B - 1 2026-04-13

Recent flights last 5

DateFlightRouteTakeoffLandingDuration
2026-04-13 MSA56B - Apr 13, 22:55 UTCApr 13, 23:40 UTC45m
2026-04-13 MSA91C - Apr 13, 20:10 UTCApr 13, 21:30 UTC1h 20m
2026-04-13 MSA79F FCO → CTA Apr 13, 17:55 UTCApr 13, 18:50 UTC55m
2026-04-13 MSA976P - Apr 13, 01:05 UTCApr 13, 01:40 UTC35m
2026-04-12 MSA86E - Apr 12, 18:45 UTCApr 12, 19:15 UTC30m

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

Mode-S 4CAFCA frequently asked

What is Mode-S code 4CAFCA?
4CAFCA is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-GHA.
Where is Mode-S 4CAFCA registered?
Mode-S code 4CAFCA is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAFCA broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAFCA, octal 23127712, decimal 5,025,738.
What flights does 4CAFCA operate?
Mode-S 4CAFCA has broadcast 5 distinct callsigns, including MSA976P, MSA91C, MSA86E, MSA79F, MSA56B.