sensors Mode-S transponder

4CAFCC

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-SIG · AIRBUS A-320neo

Hex
4CAFCC
Octal
23127714
Decimal
5,025,740
Country
IE
Tail
EI-SIG
Type
A20N
No current signal · last broadcast 13h ago
Flights observed
17
Distinct callsigns
11
Country
IE
Last broadcast
13h ago

Last known position

Most recent position reported by Mode-S 4CAFCC.

Country allocation

The ICAO 24-bit address 4CAFCC 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 11 distinct

Callsign Airline Flights Last seen
SAS687 - 3 2026-04-13
SAS688 - 2 2026-04-13
SAS594 - 2 2026-04-14
SAS57B Scandinavian Airlines System 2 2026-04-14
SAS21D Scandinavian Airlines System 2 2026-04-13
SAS73C Scandinavian Airlines System 1 2026-04-12
SAS560 - 1 2026-04-12
SAS45F - 1 2026-04-13
SAS448 - 1 2026-04-13
SAS431 - 1 2026-04-13
SAS430 - 1 2026-04-13

Recent flights last 17

DateFlightRouteTakeoffLandingDuration
2026-04-14 SAS594 - Apr 14, 09:10 UTCApr 14, 09:45 UTC35m
2026-04-14 SAS594 - Apr 14, 08:40 UTCApr 14, 09:05 UTC25m
2026-04-14 SAS57B CPH → BRU Apr 14, 07:10 UTCApr 14, 07:30 UTC20m
2026-04-14 SAS57B CPH → BRU Apr 14, 06:15 UTCApr 14, 07:10 UTC55m
2026-04-13 SAS448 - Apr 13, 21:35 UTCApr 13, 22:00 UTC25m
2026-04-13 SAS688 - Apr 13, 19:50 UTCApr 13, 20:20 UTC30m
2026-04-13 SAS688 - Apr 13, 18:40 UTCApr 13, 20:10 UTC1h 30m
2026-04-13 SAS687 - Apr 13, 16:15 UTCApr 13, 17:20 UTC1h 5m
2026-04-13 SAS687 - Apr 13, 15:50 UTCApr 13, 17:20 UTC1h 30m
2026-04-13 SAS687 - Apr 13, 15:30 UTCApr 13, 16:15 UTC45m
2026-04-13 SAS431 - Apr 13, 13:45 UTCApr 13, 14:15 UTC30m
2026-04-13 SAS430 - Apr 13, 12:20 UTCApr 13, 12:45 UTC25m
2026-04-13 SAS45F - Apr 13, 09:45 UTCApr 13, 11:05 UTC1h 20m
2026-04-13 SAS21D CPH → CDG Apr 13, 07:55 UTCApr 13, 08:25 UTC30m
2026-04-13 SAS21D CPH → CDG Apr 13, 06:45 UTCApr 13, 08:15 UTC1h 30m
2026-04-12 SAS560 - Apr 12, 19:00 UTCApr 12, 20:15 UTC1h 15m
2026-04-12 SAS73C CPH → CDG Apr 12, 17:15 UTCApr 12, 17:30 UTC15m

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

Mode-S 4CAFCC frequently asked

What is Mode-S code 4CAFCC?
4CAFCC is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-SIG.
Where is Mode-S 4CAFCC registered?
Mode-S code 4CAFCC is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAFCC broadcasting right now?
No active broadcast right now. Last signal was 13h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAFCC, octal 23127714, decimal 5,025,740.
What flights does 4CAFCC operate?
Mode-S 4CAFCC has broadcast 11 distinct callsigns, including SAS687, SAS688, SAS594, SAS57B, SAS21D.