Apparatus

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sensors Mode-S transponder

4CAF10

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-KFH

Hex
4CAF10
Octal
23127420
Decimal
5,025,552
Country
IE
Tail
EI-KFH
Type
A20N
No current signal · last broadcast 13d ago
Flights observed
70
Distinct callsigns
20
Country
IE
Last broadcast
13d ago

Last known position

Most recent position reported by Mode-S 4CAF10.

Country allocation

The ICAO 24-bit address 4CAF10 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 20 distinct

Callsign Airline Flights Last seen
AYN7817 - 4 2026-07-13
AYN7475 - 4 2026-07-10
AYN7151 - 4 2026-06-09
AYN7994 - 3 2026-07-21
AYN7906 - 3 2026-07-25
AYN7905 - 3 2026-07-25
AYN7875 - 3 2026-07-18
AYN7352 - 3 2026-07-23
AYN7351 - 3 2026-07-23
AYN7078 - 3 2026-06-29
AYN7077 - 3 2026-06-29
AYN7993 - 2 2026-07-21
AYN7951 - 2 2026-06-04
AYN7876 - 2 2026-07-18
AYN7819 - 2 2026-06-17
AYN7818 - 2 2026-07-13
AYN7676 - 2 2026-07-12
AYN7606 - 2 2026-07-20
AYN7605 - 2 2026-07-20
AYN7372 - 2 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AYN7962 - Jul 26, 16:05 UTCJul 26, 20:20 UTC4h 15m
2026-07-25 AYN7372 - Jul 25, 15:30 UTCJul 25, 16:00 UTC30m
2026-07-25 AYN7906 - Jul 25, 07:55 UTCJul 25, 14:25 UTC6h 30m
2026-07-25 AYN7905 - Jul 25, 06:25 UTCJul 25, 06:55 UTC30m
2026-07-23 AYN7352 - Jul 23, 12:30 UTCJul 23, 12:45 UTC15m
2026-07-23 AYN7351 - Jul 23, 11:15 UTCJul 23, 11:40 UTC25m
2026-07-21 AYN7994 - Jul 21, 12:45 UTCJul 21, 13:25 UTC40m
2026-07-21 AYN7993 - Jul 21, 11:25 UTCJul 21, 11:45 UTC20m
2026-07-20 AYN7606 - Jul 20, 10:40 UTCJul 20, 11:25 UTC45m
2026-07-20 AYN7605 - Jul 20, 09:00 UTCJul 20, 09:20 UTC20m
2026-07-18 AYN7994 - Jul 18, 15:25 UTCJul 18, 16:10 UTC45m
2026-07-18 AYN7876 - Jul 18, 08:35 UTCJul 18, 14:30 UTC5h 55m
2026-07-18 AYN7875 - Jul 18, 04:35 UTCJul 18, 07:15 UTC2h 40m
2026-07-14 AYN7230 - Jul 14, 09:05 UTCJul 14, 21:25 UTC12h 20m
2026-07-14 AYN7229 - Jul 14, 06:35 UTCJul 14, 07:40 UTC1h 5m
2026-07-13 AYN7229 - Jul 13, 10:10 UTCJul 14, 07:40 UTC21h 30m
2026-07-13 AYN7818 - Jul 13, 09:20 UTCJul 14, 07:40 UTC22h 20m
2026-07-13 AYN7817 - Jul 13, 07:25 UTCJul 13, 07:55 UTC30m
2026-07-12 AYN7676 - Jul 12, 10:10 UTCJul 13, 07:55 UTC21h 45m
2026-07-12 AYN7676 - Jul 12, 09:15 UTCJul 13, 07:55 UTC22h 40m
2026-07-11 AYN7476 - Jul 11, 13:00 UTCJul 12, 07:50 UTC18h 50m
2026-07-10 AYN7475 - Jul 10, 18:10 UTCJul 11, 11:30 UTC17h 21m
2026-07-10 AYN7606 - Jul 10, 08:15 UTCJul 10, 22:25 UTC14h 10m
2026-07-09 AYN7605 KUT → KUT Jul 9, 14:00 UTCJul 10, 07:10 UTC17h 10m
2026-07-09 AYN7993 - Jul 9, 12:05 UTCJul 9, 12:55 UTC50m
2026-07-07 AYN7352 - Jul 7, 11:35 UTCJul 7, 11:55 UTC20m
2026-07-07 AYN7351 - Jul 7, 10:20 UTCJul 7, 10:45 UTC25m
2026-07-06 AYN7906 - Jul 6, 08:10 UTCJul 6, 08:50 UTC40m
2026-07-05 AYN7905 - Jul 5, 16:25 UTCJul 6, 07:10 UTC14h 45m
2026-07-04 AYN7906 - Jul 4, 07:55 UTCJul 4, 08:40 UTC45m
2026-07-04 AYN7905 - Jul 4, 05:40 UTCJul 4, 06:45 UTC1h 5m
2026-07-02 AYN7372 - Jul 2, 15:30 UTCJul 2, 16:00 UTC30m
2026-07-02 AYN7371 - Jul 2, 14:10 UTCJul 2, 14:35 UTC25m
2026-06-29 AYN7078 - Jun 29, 10:10 UTCJun 29, 10:50 UTC40m
2026-06-29 AYN7077 - Jun 29, 08:19 UTCJun 29, 09:10 UTC50m
2026-06-27 AYN7078 - Jun 27, 09:40 UTCJun 27, 10:19 UTC40m
2026-06-27 AYN7077 - Jun 27, 07:19 UTCJun 27, 08:20 UTC1h 0m
2026-06-24 AYN7112 - Jun 24, 12:04 UTCJun 24, 13:50 UTC1h 45m
2026-06-24 AYN7111 - Jun 24, 08:35 UTCJun 24, 10:45 UTC2h 10m
2026-06-20 AYN7994 - Jun 20, 15:29 UTCJun 20, 16:19 UTC50m
2026-06-20 AYN7876 - Jun 20, 08:34 UTCJun 20, 14:35 UTC6h 0m
2026-06-20 AYN7875 - Jun 20, 04:44 UTCJun 20, 07:14 UTC2h 30m
2026-06-19 AYN7875 - Jun 19, 10:04 UTCJun 20, 07:14 UTC21h 10m
2026-06-19 AYN7818 - Jun 19, 09:14 UTCJun 20, 05:59 UTC20h 45m
2026-06-18 AYN7817 - Jun 18, 12:05 UTCJun 19, 07:59 UTC19h 54m
2026-06-18 AYN7817 - Jun 18, 10:55 UTCJun 19, 07:59 UTC21h 4m
2026-06-18 AYN7817 - Jun 18, 08:05 UTCJun 19, 07:59 UTC23h 54m
2026-06-18 AYN7475 - Jun 18, 06:55 UTCJun 19, 05:59 UTC23h 4m
2026-06-17 AYN7475 - Jun 17, 12:05 UTCJun 18, 12:00 UTC23h 55m
2026-06-17 AYN7475 - Jun 17, 11:45 UTCJun 18, 08:55 UTC21h 10m

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

Mode-S 4CAF10 frequently asked

What is Mode-S code 4CAF10?
4CAF10 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-KFH.
Where is Mode-S 4CAF10 registered?
Mode-S code 4CAF10 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAF10 broadcasting right now?
No active broadcast right now. Last signal was 13d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAF10, octal 23127420, decimal 5,025,552.
What flights does 4CAF10 operate?
Mode-S 4CAF10 has broadcast 20 distinct callsigns, including AYN7817, AYN7475, AYN7151, AYN7994, AYN7906.