Apparatus

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sensors Mode-S transponder

4CAF0E

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-HRG · BOEING 737-800

Hex
4CAF0E
Octal
23127416
Decimal
5,025,550
Country
IE
Tail
EI-HRG
Type
B738
No current signal · last broadcast 4d ago
Flights observed
66
Distinct callsigns
18
Country
IE
Last broadcast
4d ago

Last known position

Most recent position reported by Mode-S 4CAF0E.

Country allocation

The ICAO 24-bit address 4CAF0E 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 18 distinct

Callsign Airline Flights Last seen
CGS4418 - 18 2026-07-14
CGS4421 - 17 2026-07-14
CGS4420 - 6 2026-07-14
CGS4419 - 6 2026-07-10
CGS808 - 3 2026-07-14
CGS83A - 2 2026-07-04
CGS807 - 2 2026-06-15
CGS804 - 2 2026-07-05
SH4421 - 1 2026-06-02
CGS998 - 1 2026-04-19
CGS871 - 1 2026-06-30
CGS863 - 1 2026-07-12
CGS806 - 1 2026-06-11
CGS151 - 1 2026-06-14
ABR738 ASL Airlines Ireland 1 2026-07-20
ABR737 ASL Airlines Ireland 1 2026-07-20
ABR469 ASL Airlines Ireland 1 2026-07-23
ABR468 ASL Airlines Ireland 1 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 ABR468 LEJ → MXP Jul 23, 15:30 UTCJul 23, 16:35 UTC1h 5m
2026-07-23 ABR469 MXP → LEJ Jul 23, 11:25 UTCJul 23, 12:45 UTC1h 20m
2026-07-20 ABR738 BCN → LEJ Jul 20, 17:45 UTCJul 20, 21:05 UTC3h 20m
2026-07-20 ABR737 CGN → LGG Jul 20, 15:35 UTCJul 20, 16:35 UTC1h 0m
2026-07-14 CGS4418 - Jul 14, 23:15 UTCJul 14, 23:45 UTC30m
2026-07-14 CGS4421 - Jul 14, 20:20 UTCJul 14, 20:50 UTC30m
2026-07-14 CGS4420 - Jul 14, 10:25 UTCJul 14, 11:00 UTC35m
2026-07-14 CGS808 - Jul 14, 06:50 UTCJul 14, 07:15 UTC25m
2026-07-12 CGS863 - Jul 12, 06:25 UTCJul 12, 06:55 UTC30m
2026-07-10 CGS4419 - Jul 10, 11:40 UTCJul 10, 12:05 UTC25m
2026-07-10 CGS4418 - Jul 10, 00:05 UTCJul 10, 00:35 UTC30m
2026-07-09 CGS4421 - Jul 9, 22:00 UTCJul 9, 22:30 UTC30m
2026-07-09 CGS4420 - Jul 9, 11:35 UTCJul 9, 12:05 UTC30m
2026-07-08 CGS4419 - Jul 8, 09:40 UTCJul 8, 10:10 UTC30m
2026-07-07 CGS4418 - Jul 7, 23:15 UTCJul 7, 23:45 UTC30m
2026-07-07 CGS4421 - Jul 7, 20:45 UTCJul 7, 21:15 UTC30m
2026-07-07 CGS4420 - Jul 7, 10:25 UTCJul 7, 10:55 UTC30m
2026-07-05 CGS804 - Jul 5, 21:35 UTCJul 5, 22:05 UTC30m
2026-07-04 CGS83A - Jul 4, 11:20 UTCJul 4, 11:55 UTC35m
2026-07-03 CGS4419 - Jul 3, 10:35 UTCJul 3, 11:05 UTC30m
2026-07-03 CGS4418 - Jul 3, 00:10 UTCJul 3, 00:35 UTC25m
2026-07-02 CGS4421 - Jul 2, 21:40 UTCJul 2, 22:10 UTC30m
2026-07-02 CGS4420 - Jul 2, 11:20 UTCJul 2, 11:55 UTC35m
2026-07-01 CGS808 NBO → DWC Jul 1, 16:00 UTCJul 1, 16:25 UTC25m
2026-06-30 CGS871 - Jun 30, 12:45 UTCJun 30, 13:20 UTC35m
2026-06-28 CGS804 - Jun 28, 21:04 UTCJun 28, 21:34 UTC30m
2026-06-27 CGS83A - Jun 27, 11:30 UTCJun 27, 11:59 UTC30m
2026-06-26 CGS4419 - Jun 26, 10:44 UTCJun 26, 11:09 UTC25m
2026-06-26 CGS4418 - Jun 26, 00:24 UTCJun 26, 00:55 UTC30m
2026-06-25 CGS4421 - Jun 25, 21:55 UTCJun 25, 22:29 UTC35m
2026-06-25 CGS4420 - Jun 25, 11:19 UTCJun 25, 11:54 UTC35m
2026-06-23 CGS4419 - Jun 23, 06:39 UTCJun 23, 07:09 UTC30m
2026-06-22 CGS4418 - Jun 22, 20:34 UTCJun 22, 20:55 UTC20m
2026-06-22 CGS4421 - Jun 22, 01:40 UTCJun 22, 02:14 UTC35m
2026-06-21 CGS4420 - Jun 21, 10:14 UTCJun 21, 10:34 UTC20m
2026-06-17 CGS4419 - Jun 17, 10:00 UTCJun 17, 10:35 UTC35m
2026-06-17 CGS4418 - Jun 17, 00:15 UTCJun 17, 00:40 UTC25m
2026-06-16 CGS4421 - Jun 16, 20:20 UTCJun 16, 20:45 UTC25m
2026-06-16 CGS808 NBO → DWC Jun 16, 07:55 UTCJun 16, 08:20 UTC25m
2026-06-15 CGS807 - Jun 15, 01:25 UTCJun 15, 01:35 UTC10m
2026-06-14 CGS807 - Jun 14, 20:55 UTCJun 14, 21:10 UTC15m
2026-06-14 CGS151 DWC → DWC Jun 14, 07:45 UTCJun 14, 08:10 UTC25m
2026-06-11 CGS806 - Jun 11, 23:15 UTCJun 11, 23:40 UTC25m
2026-06-08 CGS4418 - Jun 8, 22:50 UTCJun 8, 23:15 UTC25m
2026-06-07 CGS4421 - Jun 7, 22:35 UTCJun 7, 23:10 UTC35m
2026-06-03 CGS4418 - Jun 3, 14:45 UTCJun 3, 15:05 UTC20m
2026-06-02 SH4421 - Jun 2, 21:00 UTCJun 2, 21:30 UTC30m
2026-05-25 CGS4418 - May 25, 20:19 UTCMay 25, 20:45 UTC25m
2026-05-24 CGS4421 - May 24, 23:15 UTCMay 24, 23:40 UTC25m
2026-05-23 CGS4418 - May 23, 02:45 UTCMay 23, 03:15 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-HRG page for operator, model, and routing details .

Mode-S 4CAF0E frequently asked

What is Mode-S code 4CAF0E?
4CAF0E is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-HRG.
Where is Mode-S 4CAF0E registered?
Mode-S code 4CAF0E is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAF0E broadcasting right now?
No active broadcast right now. Last signal was 4d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAF0E, octal 23127416, decimal 5,025,550.
What flights does 4CAF0E operate?
Mode-S 4CAF0E has broadcast 18 distinct callsigns, including CGS4418, CGS4421, CGS4420, CGS4419, CGS808.