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sensors Mode-S transponder

4CAF09

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-IRS · AGUSTA AW-189

Hex
4CAF09
Octal
23127411
Decimal
5,025,545
Country
IE
Tail
EI-IRS
Type
A189
No current signal · last broadcast Jul 22, 16:45 UTC
Flights observed
119
Distinct callsigns
9
Country
IE
Last broadcast
Jul 22, 16:45 UTC

Last known position

Most recent position reported by Mode-S 4CAF09.

Country allocation

The ICAO 24-bit address 4CAF09 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
RSQ118 - 32 2026-07-18
CGI118 - 31 2026-07-22
MED118 - 21 2026-07-20
R118 - 19 2026-07-10
CGI116 - 8 2026-05-26
CG118 - 3 2026-05-10
R116 - 2 2026-05-24
EIIRS - 2 2026-06-10
RES116 - 1 2026-05-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-22 CGI118 - Jul 22, 15:20 UTCJul 22, 16:45 UTC1h 25m
2026-07-20 MED118 - Jul 20, 03:25 UTCJul 20, 03:40 UTC15m
2026-07-20 MED118 - Jul 20, 02:15 UTCJul 20, 02:35 UTC20m
2026-07-19 CGI118 - Jul 19, 15:20 UTCJul 19, 15:35 UTC15m
2026-07-19 CGI118 - Jul 19, 13:50 UTCJul 19, 14:05 UTC15m
2026-07-18 CGI118 - Jul 18, 16:20 UTCJul 18, 16:35 UTC15m
2026-07-18 RSQ118 - Jul 18, 13:55 UTCJul 18, 14:10 UTC15m
2026-07-18 RSQ118 - Jul 18, 10:15 UTCJul 18, 10:35 UTC20m
2026-07-18 RSQ118 - Jul 18, 09:10 UTCJul 18, 09:30 UTC20m
2026-07-17 RSQ118 - Jul 17, 21:10 UTCJul 17, 21:34 UTC25m
2026-07-17 RSQ118 - Jul 17, 19:55 UTCJul 17, 20:40 UTC45m
2026-07-17 RSQ118 - Jul 17, 18:25 UTCJul 17, 18:34 UTC10m
2026-07-17 RSQ118 - Jul 17, 16:04 UTCJul 17, 16:19 UTC15m
2026-07-17 RSQ118 - Jul 17, 13:50 UTCJul 17, 15:55 UTC2h 5m
2026-07-17 RSQ118 - Jul 17, 02:54 UTCJul 17, 03:14 UTC20m
2026-07-17 RSQ118 - Jul 17, 01:55 UTCJul 17, 02:10 UTC15m
2026-07-17 RSQ118 - Jul 17, 00:30 UTCJul 17, 00:55 UTC25m
2026-07-16 RSQ118 - Jul 16, 19:50 UTCJul 16, 20:35 UTC45m
2026-07-16 RSQ118 - Jul 16, 15:40 UTCJul 16, 16:09 UTC30m
2026-07-15 CGI118 - Jul 15, 10:10 UTCJul 15, 10:50 UTC40m
2026-07-14 MED118 - Jul 14, 18:05 UTCJul 14, 18:15 UTC10m
2026-07-12 RSQ118 - Jul 12, 13:50 UTCJul 12, 14:35 UTC45m
2026-07-12 RSQ118 - Jul 12, 12:05 UTCJul 12, 12:55 UTC50m
2026-07-11 RSQ118 - Jul 11, 20:05 UTCJul 11, 20:15 UTC10m
2026-07-11 CGI118 - Jul 11, 18:35 UTCJul 11, 18:45 UTC10m
2026-07-10 R118 - Jul 10, 21:35 UTCJul 10, 22:00 UTC25m
2026-07-10 R118 - Jul 10, 19:55 UTCJul 10, 20:55 UTC1h 0m
2026-07-10 RSQ118 - Jul 10, 09:30 UTCJul 10, 10:05 UTC35m
2026-07-09 CGI118 - Jul 9, 15:35 UTCJul 9, 15:55 UTC20m
2026-07-09 CGI118 - Jul 9, 10:15 UTCJul 9, 10:25 UTC10m
2026-07-09 CGI118 - Jul 9, 09:05 UTCJul 9, 09:20 UTC15m
2026-07-09 CGI118 - Jul 9, 07:10 UTCJul 9, 07:30 UTC20m
2026-07-06 R118 - Jul 6, 14:45 UTCJul 6, 15:15 UTC30m
2026-07-05 R118 - Jul 5, 20:35 UTCJul 5, 20:45 UTC10m
2026-07-04 R118 - Jul 4, 14:50 UTCJul 4, 15:35 UTC45m
2026-07-01 CGI118 - Jul 1, 20:10 UTCJul 1, 20:20 UTC10m
2026-06-30 R118 - Jun 30, 14:20 UTCJun 30, 14:40 UTC20m
2026-06-29 RSQ118 - Jun 29, 20:49 UTCJun 29, 21:50 UTC1h 0m
2026-06-29 RSQ118 - Jun 29, 07:15 UTCJun 29, 09:05 UTC1h 50m
2026-06-28 RSQ118 - Jun 28, 19:34 UTCJun 28, 20:09 UTC35m
2026-06-28 MED118 - Jun 28, 14:19 UTCJun 28, 14:39 UTC20m
2026-06-28 MED118 - Jun 28, 13:19 UTCJun 28, 13:49 UTC30m
2026-06-27 R118 - Jun 27, 22:25 UTCJun 27, 23:10 UTC45m
2026-06-27 CGI118 - Jun 27, 10:05 UTCJun 27, 10:14 UTC10m
2026-06-25 MED118 - Jun 25, 17:49 UTCJun 25, 18:10 UTC20m
2026-06-25 MED118 - Jun 25, 16:05 UTCJun 25, 16:20 UTC15m
2026-06-25 MED118 - Jun 25, 15:04 UTCJun 25, 15:24 UTC20m
2026-06-25 RSQ118 - Jun 25, 08:30 UTCJun 25, 08:45 UTC15m
2026-06-24 RSQ118 - Jun 24, 16:24 UTCJun 24, 16:34 UTC10m
2026-06-24 RSQ118 - Jun 24, 15:24 UTCJun 24, 16:19 UTC55m

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

Mode-S 4CAF09 frequently asked

What is Mode-S code 4CAF09?
4CAF09 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-IRS.
Where is Mode-S 4CAF09 registered?
Mode-S code 4CAF09 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAF09 broadcasting right now?
No active broadcast right now. Last signal was Jul 22, 16:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAF09, octal 23127411, decimal 5,025,545.
What flights does 4CAF09 operate?
Mode-S 4CAF09 has broadcast 9 distinct callsigns, including RSQ118, CGI118, MED118, R118, CGI116.