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sensors Mode-S transponder

4CAEC3

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-HNF

Hex
4CAEC3
Octal
23127303
Decimal
5,025,475
Country
IE
Tail
EI-HNF
Type
RF6
No current signal · last broadcast 10d ago
Flights observed
77
Distinct callsigns
1
Country
IE
Last broadcast
10d ago

Last known position

Most recent position reported by Mode-S 4CAEC3.

Country allocation

The ICAO 24-bit address 4CAEC3 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 1 distinct

Callsign Airline Flights Last seen
AFZ55X - 76 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 AFZ55X - Jul 24, 16:45 UTCJul 24, 17:00 UTC15m
2026-07-24 AFZ55X - Jul 24, 15:15 UTCJul 24, 15:50 UTC35m
2026-07-23 AFZ55X - Jul 23, 13:40 UTCJul 23, 14:30 UTC50m
2026-07-23 AFZ55X - Jul 23, 11:45 UTCJul 23, 12:20 UTC35m
2026-07-23 AFZ55X - Jul 23, 10:15 UTCJul 23, 10:55 UTC40m
2026-07-23 AFZ55X - Jul 23, 08:10 UTCJul 23, 09:00 UTC50m
2026-07-21 AFZ55X - Jul 21, 12:00 UTCJul 21, 12:40 UTC40m
2026-07-21 AFZ55X - Jul 21, 09:55 UTCJul 21, 10:45 UTC50m
2026-07-20 AFZ55X ORK → ORK Jul 20, 13:00 UTCJul 20, 13:35 UTC35m
2026-07-20 AFZ55X - Jul 20, 11:45 UTCJul 20, 12:15 UTC30m
2026-07-20 AFZ55X - Jul 20, 10:25 UTCJul 20, 11:05 UTC40m
2026-07-17 AFZ55X - Jul 17, 12:30 UTCJul 17, 13:20 UTC50m
2026-07-15 AFZ55X - Jul 15, 10:45 UTCJul 15, 11:25 UTC40m
2026-07-15 AFZ55X - Jul 15, 09:15 UTCJul 15, 10:00 UTC45m
2026-07-14 AFZ55X - Jul 14, 13:40 UTCJul 14, 14:25 UTC45m
2026-07-14 AFZ55X ORK → ORK Jul 14, 12:05 UTCJul 14, 12:50 UTC45m
2026-07-14 AFZ55X - Jul 14, 09:35 UTCJul 14, 10:15 UTC40m
2026-07-14 AFZ55X ORK → ORK Jul 14, 07:25 UTCJul 14, 08:10 UTC45m
2026-07-13 AFZ55X - Jul 13, 14:55 UTCJul 13, 15:55 UTC1h 0m
2026-07-13 AFZ55X - Jul 13, 13:15 UTCJul 13, 14:05 UTC50m
2026-07-13 AFZ55X - Jul 13, 11:35 UTCJul 13, 12:10 UTC35m
2026-07-13 AFZ55X - Jul 13, 09:55 UTCJul 13, 10:30 UTC35m
2026-07-13 AFZ55X - Jul 13, 08:05 UTCJul 13, 08:35 UTC30m
2026-07-12 AFZ55X - Jul 12, 15:55 UTCJul 12, 16:25 UTC30m
2026-07-12 AFZ55X ORK → ORK Jul 12, 13:10 UTCJul 12, 14:05 UTC55m
2026-07-12 AFZ55X - Jul 12, 11:05 UTCJul 12, 11:40 UTC35m
2026-07-12 AFZ55X - Jul 12, 09:10 UTCJul 12, 09:50 UTC40m
2026-07-10 AFZ55X - Jul 10, 16:45 UTCJul 10, 17:05 UTC20m
2026-07-10 AFZ55X - Jul 10, 14:05 UTCJul 10, 14:55 UTC50m
2026-07-08 AFZ55X - Jul 8, 07:40 UTCJul 8, 07:55 UTC15m
2026-07-06 AFZ55X - Jul 6, 16:50 UTCJul 6, 17:30 UTC40m
2026-07-06 AFZ55X - Jul 6, 15:00 UTCJul 6, 15:40 UTC40m
2026-07-06 AFZ55X - Jul 6, 13:40 UTCJul 6, 14:05 UTC25m
2026-07-05 AFZ55X - Jul 5, 18:45 UTCJul 5, 19:25 UTC40m
2026-07-04 AFZ55X - Jul 4, 10:25 UTCJul 4, 11:50 UTC1h 25m
2026-07-04 AFZ55X - Jul 4, 08:05 UTCJul 4, 08:45 UTC40m
2026-07-03 AFZ55X - Jul 3, 12:00 UTCJul 3, 12:40 UTC40m
2026-07-03 AFZ55X - Jul 3, 10:25 UTCJul 3, 11:05 UTC40m
2026-07-02 AFZ55X - Jul 2, 11:20 UTCJul 2, 11:30 UTC10m
2026-07-02 AFZ55X ORK → ORK Jul 2, 08:55 UTCJul 2, 09:35 UTC40m
2026-06-30 AFZ55X - Jun 30, 14:55 UTCJun 30, 15:35 UTC40m
2026-06-30 AFZ55X - Jun 30, 13:20 UTCJun 30, 14:15 UTC55m
2026-06-30 AFZ55X - Jun 30, 11:10 UTCJun 30, 12:00 UTC50m
2026-06-30 AFZ55X - Jun 30, 09:45 UTCJun 30, 10:25 UTC40m
2026-06-30 AFZ55X - Jun 30, 08:25 UTCJun 30, 09:05 UTC40m
2026-06-29 AFZ55X - Jun 29, 10:04 UTCJun 29, 10:50 UTC45m
2026-06-29 AFZ55X - Jun 29, 08:29 UTCJun 29, 09:00 UTC30m
2026-06-28 AFZ55X - Jun 28, 10:30 UTCJun 28, 10:55 UTC25m
2026-06-28 AFZ55X - Jun 28, 09:25 UTCJun 28, 09:39 UTC15m
2026-06-24 AFZ55X - Jun 24, 15:44 UTCJun 24, 16:24 UTC40m

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

Mode-S 4CAEC3 frequently asked

What is Mode-S code 4CAEC3?
4CAEC3 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-HNF.
Where is Mode-S 4CAEC3 registered?
Mode-S code 4CAEC3 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAEC3 broadcasting right now?
No active broadcast right now. Last signal was 10d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAEC3, octal 23127303, decimal 5,025,475.
What flights does 4CAEC3 operate?
Mode-S 4CAEC3 has broadcast 1 distinct callsign, including AFZ55X.