Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

4CAF18

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-IRG

Hex
4CAF18
Octal
23127430
Decimal
5,025,560
Country
IE
Tail
EI-IRG
Type
A189
No current signal · last broadcast 1h ago
Flights observed
55
Distinct callsigns
6
Country
IE
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 4CAF18.

Country allocation

The ICAO 24-bit address 4CAF18 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 6 distinct

Callsign Airline Flights Last seen
CGI116 - 47 2026-07-04
R116 - 3 2026-06-26
CGIRG - 2 2026-05-15
RSQ116 - 1 2026-06-02
MED116 - 1 2026-05-31
EIIRG - 1 2026-05-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-04 CGI116 - Jul 4, 20:50 UTCJul 4, 22:45 UTC1h 55m
2026-07-02 CGI116 - Jul 2, 15:05 UTCJul 2, 17:20 UTC2h 15m
2026-07-02 CGI116 - Jul 2, 09:00 UTCJul 2, 10:20 UTC1h 20m
2026-06-30 CGI116 - Jun 30, 15:40 UTCJun 30, 16:00 UTC20m
2026-06-30 CGI116 - Jun 30, 14:45 UTCJun 30, 15:00 UTC15m
2026-06-30 CGI116 - Jun 30, 13:50 UTCJun 30, 14:10 UTC20m
2026-06-28 CGI116 - Jun 28, 20:39 UTCJun 28, 22:24 UTC1h 45m
2026-06-27 CGI116 - Jun 27, 17:49 UTCJun 27, 19:15 UTC1h 25m
2026-06-26 R116 - Jun 26, 17:09 UTCJun 26, 17:44 UTC35m
2026-06-25 CGI116 - Jun 25, 10:04 UTCJun 25, 10:15 UTC10m
2026-06-25 CGI116 - Jun 25, 08:34 UTCJun 25, 08:50 UTC15m
2026-06-24 CGI116 - Jun 24, 19:15 UTCJun 24, 20:24 UTC1h 10m
2026-06-22 CGI116 - Jun 22, 19:00 UTCJun 22, 19:44 UTC45m
2026-06-22 CGI116 - Jun 22, 17:55 UTCJun 22, 18:15 UTC20m
2026-06-21 CGI116 - Jun 21, 20:50 UTCJun 21, 22:40 UTC1h 50m
2026-06-20 CGI116 - Jun 20, 13:29 UTCJun 20, 13:49 UTC20m
2026-06-20 CGI116 - Jun 20, 08:55 UTCJun 20, 10:25 UTC1h 30m
2026-06-17 CGI116 - Jun 17, 17:00 UTCJun 17, 17:45 UTC45m
2026-06-15 CGI116 - Jun 15, 14:05 UTCJun 15, 16:24 UTC2h 20m
2026-06-15 CGI116 - Jun 15, 09:15 UTCJun 15, 10:20 UTC1h 5m
2026-06-13 CGI116 - Jun 13, 20:55 UTCJun 13, 22:50 UTC1h 55m
2026-06-12 CGI116 - Jun 12, 22:10 UTCJun 12, 22:25 UTC15m
2026-06-12 CGI116 - Jun 12, 20:55 UTCJun 12, 21:35 UTC40m
2026-06-12 CGI116 - Jun 12, 09:00 UTCJun 12, 10:20 UTC1h 20m
2026-06-08 CGI116 - Jun 8, 16:20 UTCJun 8, 18:25 UTC2h 5m
2026-06-08 CGI116 - Jun 8, 09:20 UTCJun 8, 10:25 UTC1h 5m
2026-06-07 CGI116 - Jun 7, 02:40 UTCJun 7, 05:35 UTC2h 55m
2026-06-05 CGI116 - Jun 5, 16:25 UTCJun 5, 16:55 UTC30m
2026-06-05 CGI116 - Jun 5, 14:50 UTCJun 5, 15:15 UTC25m
2026-06-03 CGI116 - Jun 3, 20:15 UTCJun 3, 20:35 UTC20m
2026-06-03 CGI116 - Jun 3, 18:30 UTCJun 3, 18:55 UTC25m
2026-06-03 CGI116 - Jun 3, 08:55 UTCJun 3, 10:00 UTC1h 5m
2026-06-02 RSQ116 - Jun 2, 13:35 UTCJun 2, 13:50 UTC15m
2026-06-02 CGI116 - Jun 2, 12:00 UTCJun 2, 12:15 UTC15m
2026-06-01 CGI116 - Jun 1, 15:00 UTCJun 1, 15:40 UTC40m
2026-06-01 CGI116 - Jun 1, 14:05 UTCJun 1, 14:25 UTC20m
2026-06-01 CGI116 - Jun 1, 08:55 UTCJun 1, 10:05 UTC1h 10m
2026-05-31 MED116 - May 31, 12:00 UTCMay 31, 12:15 UTC15m
2026-05-30 CGI116 - May 30, 16:00 UTCMay 30, 16:20 UTC20m
2026-05-30 CGI116 - May 30, 14:20 UTCMay 30, 15:15 UTC55m
2026-05-30 CGI116 - May 30, 01:30 UTCMay 30, 01:45 UTC15m
2026-05-30 CGI116 - May 30, 00:10 UTCMay 30, 00:30 UTC20m
2026-05-29 CGI116 - May 29, 14:55 UTCMay 29, 16:55 UTC2h 0m
2026-05-29 R116 - May 29, 02:15 UTCMay 29, 02:40 UTC25m
2026-05-28 R116 - May 28, 16:10 UTCMay 28, 17:40 UTC1h 30m
2026-05-28 CGI116 - May 28, 14:10 UTCMay 28, 15:10 UTC1h 0m
2026-05-28 CGI116 - May 28, 09:05 UTCMay 28, 09:50 UTC45m
2026-05-27 CGI116 - May 27, 16:05 UTCMay 27, 17:05 UTC1h 0m
2026-05-21 CGI116 - May 21, 15:25 UTCMay 21, 16:50 UTC1h 25m
2026-05-21 CGI116 - May 21, 09:30 UTCMay 21, 10:35 UTC1h 5m

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

Mode-S 4CAF18 frequently asked

What is Mode-S code 4CAF18?
4CAF18 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-IRG.
Where is Mode-S 4CAF18 registered?
Mode-S code 4CAF18 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAF18 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAF18, octal 23127430, decimal 5,025,560.
What flights does 4CAF18 operate?
Mode-S 4CAF18 has broadcast 6 distinct callsigns, including CGI116, R116, CGIRG, RSQ116, MED116.