Apparatus

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sensors Mode-S transponder

4CAD9F

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-HDI · ATR-72-600

Hex
4CAD9F
Octal
23126637
Decimal
5,025,183
Country
IE
Tail
EI-HDI
Type
AT76
No current signal · last broadcast 1h ago
Flights observed
341
Distinct callsigns
20
Country
IE
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 4CAD9F.

Country allocation

The ICAO 24-bit address 4CAD9F 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
EAI57K Elite Air 9 2026-06-05
EAI6RC Elite Air 8 2026-06-05
EAI31M Elite Air 8 2026-06-07
EAI7S Elite Air 7 2026-06-07
EAI55SK Elite Air 7 2026-06-06
EAI54VJ Elite Air 7 2026-06-06
EAI41D Elite Air 7 2026-06-02
EAI16M Elite Air 7 2026-06-01
EAI89DF Elite Air 6 2026-06-09
EAI86W Elite Air 6 2026-06-09
EAI65Y Elite Air 6 2026-06-09
EAI64B Elite Air 6 2026-06-09
EAI55YA Elite Air 6 2026-06-07
EAI4WD Elite Air 6 2026-06-07
EAI18K Elite Air 6 2026-06-09
EAI17C Elite Air 6 2026-06-09
EAI73N Elite Air 5 2026-06-09
EAI3BM Elite Air 5 2026-06-07
EAI39V Elite Air 5 2026-06-03
EAI37E Elite Air 5 2026-06-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-09 EAI89DF BRS → BRS Jun 9, 19:35 UTCJun 9, 20:25 UTC50m
2026-06-09 EAI17C ORK → BRS Jun 9, 17:45 UTCJun 9, 18:55 UTC1h 10m
2026-06-09 EAI18K BRS → ORK Jun 9, 16:45 UTCJun 9, 17:05 UTC20m
2026-06-09 EAI86W DUB → BRS Jun 9, 14:00 UTCJun 9, 15:00 UTC1h 0m
2026-06-09 EAI65Y BHX → DUB Jun 9, 11:45 UTCJun 9, 12:50 UTC1h 5m
2026-06-09 EAI64B DUB → BHX Jun 9, 10:05 UTCJun 9, 10:55 UTC50m
2026-06-09 EAI37E NCL → DUB Jun 9, 07:55 UTCJun 9, 08:55 UTC1h 0m
2026-06-09 EAI73N DUB → DUB Jun 9, 06:15 UTCJun 9, 07:10 UTC55m
2026-06-08 EAI29M - Jun 8, 18:25 UTCJun 8, 18:55 UTC30m
2026-06-08 EAI18M DUB → IOM Jun 8, 17:05 UTCJun 8, 17:35 UTC30m
2026-06-08 EAI93D LBA → LBA Jun 8, 15:30 UTCJun 8, 16:20 UTC50m
2026-06-08 EAI92B DUB → LBA Jun 8, 13:45 UTCJun 8, 14:30 UTC45m
2026-06-08 EAI81A BRS → DUB Jun 8, 11:25 UTCJun 8, 12:20 UTC55m
2026-06-08 EAI4RA ORK → BRS Jun 8, 09:30 UTCJun 8, 10:30 UTC1h 0m
2026-06-08 EAI84LP BRS → BRS Jun 8, 07:40 UTCJun 8, 08:45 UTC1h 5m
2026-06-08 EAI8BR DUB → BRS Jun 8, 05:55 UTCJun 8, 06:45 UTC50m
2026-06-07 EAI11M MAN → DUB Jun 7, 20:05 UTCJun 7, 20:45 UTC40m
2026-06-07 EAI3BM DUB → MAN Jun 7, 18:25 UTCJun 7, 19:10 UTC45m
2026-06-07 EAI19MS MAN → DUB Jun 7, 16:40 UTCJun 7, 17:25 UTC45m
2026-06-07 EAI33CB DUB → MAN Jun 7, 15:00 UTCJun 7, 15:45 UTC45m
2026-06-07 EAI55YA EDI → DUB Jun 7, 12:40 UTCJun 7, 13:40 UTC1h 0m
2026-06-07 EAI4WD DUB → NCL Jun 7, 11:00 UTCJun 7, 11:50 UTC50m
2026-06-07 EAI31M SOU → DUB Jun 7, 08:25 UTCJun 7, 09:45 UTC1h 20m
2026-06-07 EAI7S DUB → SOU Jun 7, 06:20 UTCJun 7, 07:30 UTC1h 10m
2026-06-06 EAI29M - Jun 6, 18:09 UTCJun 6, 18:39 UTC30m
2026-06-06 EAI18M DUB → IOM Jun 6, 17:00 UTCJun 6, 17:24 UTC25m
2026-06-06 EAI89W NCL → DUB Jun 6, 15:25 UTCJun 6, 16:20 UTC55m
2026-06-06 EAI79D DUB → NCL Jun 6, 13:44 UTCJun 6, 14:40 UTC55m
2026-06-06 EAI55SK EDI → DUB Jun 6, 10:55 UTCJun 6, 12:00 UTC1h 5m
2026-06-06 EAI54VJ DUB → EDI Jun 6, 09:15 UTCJun 6, 10:09 UTC55m
2026-06-05 EAI09U SOU → DUB Jun 5, 19:15 UTCJun 5, 20:30 UTC1h 15m
2026-06-05 EAI8C DUB → SOU Jun 5, 17:20 UTCJun 5, 18:35 UTC1h 15m
2026-06-05 EAI57K EDI → DUB Jun 5, 15:05 UTCJun 5, 16:15 UTC1h 10m
2026-06-05 EAI6RC DUB → GLA Jun 5, 13:10 UTCJun 5, 14:00 UTC50m
2026-06-05 EAI13U IOM → DUB Jun 5, 11:35 UTCJun 5, 12:00 UTC25m
2026-06-05 EAI12B DUB → IOM Jun 5, 10:00 UTCJun 5, 10:30 UTC30m
2026-06-05 EAI17W MAN → DUB Jun 5, 08:25 UTCJun 5, 09:10 UTC45m
2026-06-05 EAI32V DUB → MAN Jun 5, 06:55 UTCJun 5, 07:35 UTC40m
2026-06-04 EAI3RG EDI → DUB Jun 4, 19:50 UTCJun 4, 20:50 UTC1h 0m
2026-06-04 EAI35C DUB → EDI Jun 4, 18:10 UTCJun 4, 19:05 UTC55m
2026-06-04 EAI73V INV → DUB Jun 4, 15:55 UTCJun 4, 17:05 UTC1h 10m
2026-06-04 EAI72N DUB → INV Jun 4, 13:55 UTCJun 4, 15:00 UTC1h 5m
2026-06-04 EAI38D MAN → DUB Jun 4, 12:10 UTCJun 4, 13:00 UTC50m
2026-06-04 EAI69M DUB → MAN Jun 4, 10:40 UTCJun 4, 11:25 UTC45m
2026-06-04 EAI91M LBA → LBA Jun 4, 08:35 UTCJun 4, 09:25 UTC50m
2026-06-04 EAI9L DUB → LBA Jun 4, 07:00 UTCJun 4, 07:45 UTC45m
2026-06-03 EAI11M MAN → DUB Jun 3, 20:15 UTCJun 3, 21:00 UTC45m
2026-06-03 EAI3BM DUB → MAN Jun 3, 18:40 UTCJun 3, 19:35 UTC55m
2026-06-03 EAI71G NQY → DUB Jun 3, 16:40 UTCJun 3, 17:35 UTC55m
2026-06-03 EAI62N DUB → NQY Jun 3, 15:00 UTCJun 3, 16:00 UTC1h 0m

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

Mode-S 4CAD9F frequently asked

What is Mode-S code 4CAD9F?
4CAD9F is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-HDI.
Where is Mode-S 4CAD9F registered?
Mode-S code 4CAD9F is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAD9F 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 4CAD9F, octal 23126637, decimal 5,025,183.
What flights does 4CAD9F operate?
Mode-S 4CAD9F has broadcast 20 distinct callsigns, including EAI57K, EAI6RC, EAI31M, EAI7S, EAI55SK.