Apparatus

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sensors Mode-S transponder

4CAD15

ICAO 24-bit transponder address · allocated to Ireland

Hex
4CAD15
Octal
23126425
Decimal
5,025,045
Country
IE
Transponder active on ground
Flights observed
334
Distinct callsigns
20
Country
IE
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 4CAD15.

Country allocation

The ICAO 24-bit address 4CAD15 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
EAI73N - 8 2026-07-21
EAI4HS - 8 2026-07-17
EAI37E - 8 2026-07-21
EAI33CB Elite Air 8 2026-07-06
EAI19MS Elite Air 8 2026-07-06
EAI65Y - 7 2026-07-21
EAI64B - 7 2026-07-21
EAI57K Elite Air 7 2026-07-25
EAI55YA - 7 2026-07-22
EAI4WD - 7 2026-07-22
EAI46Z - 7 2026-07-17
EAI36W - 7 2026-07-17
EAI2A Elite Air 7 2026-07-17
EAI6RC Elite Air 6 2026-07-25
EAI5ED - 6 2026-07-16
EAI39V - 6 2026-07-24
EAI19L Elite Air 6 2026-07-24
EAI95C Elite Air 5 2026-07-06
EAI94S Elite Air 5 2026-07-06
EAI8C Elite Air 5 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EAI48D DUB → CFN Jul 26, 18:00 UTCJul 26, 18:35 UTC35m
2026-07-26 EAI17N IOM → DUB Jul 26, 16:35 UTCJul 26, 16:55 UTC20m
2026-07-26 EAI16M DUB → IOM Jul 26, 15:10 UTCJul 26, 15:40 UTC30m
2026-07-26 EAI43D - Jul 26, 13:35 UTCJul 26, 14:05 UTC30m
2026-07-26 EAI42D DUB → CFN Jul 26, 12:10 UTCJul 26, 12:50 UTC40m
2026-07-26 EAI31F EDI → DUB Jul 26, 08:55 UTCJul 26, 10:00 UTC1h 5m
2026-07-26 EAI3HP DUB → EDI Jul 26, 07:15 UTCJul 26, 08:10 UTC55m
2026-07-25 EAI78R JER → DUB Jul 25, 18:40 UTCJul 25, 20:10 UTC1h 30m
2026-07-25 EAI61L DUB → JER Jul 25, 16:40 UTCJul 25, 18:00 UTC1h 20m
2026-07-25 EAI57K EDI → DUB Jul 25, 14:55 UTCJul 25, 15:50 UTC55m
2026-07-25 EAI6RC DUB → GLA Jul 25, 13:00 UTCJul 25, 14:00 UTC1h 0m
2026-07-25 EAI3RG EDI → DUB Jul 25, 09:50 UTCJul 25, 10:55 UTC1h 5m
2026-07-25 EAI35C DUB → EDI Jul 25, 07:30 UTCJul 25, 08:30 UTC1h 0m
2026-07-25 EAI35C DUB → EDI Jul 25, 06:40 UTCJul 25, 06:45 UTC5m
2026-07-24 EAI29GA GLA → DUB Jul 24, 20:35 UTCJul 24, 21:25 UTC50m
2026-07-24 EAI38JL ORK → GLA Jul 24, 18:35 UTCJul 24, 19:55 UTC1h 20m
2026-07-24 EAI43S GLA → ORK Jul 24, 16:25 UTCJul 24, 17:50 UTC1h 25m
2026-07-24 EAI28QB DUB → GLA Jul 24, 14:50 UTCJul 24, 15:40 UTC50m
2026-07-24 EAI39V LPL → DUB Jul 24, 12:20 UTCJul 24, 13:00 UTC40m
2026-07-24 EAI19L DUB → LPL Jul 24, 10:45 UTCJul 24, 11:30 UTC45m
2026-07-24 EAI23GA GLA → DUB Jul 24, 08:45 UTCJul 24, 09:35 UTC50m
2026-07-24 EAI25G DUB → GLA Jul 24, 07:10 UTCJul 24, 07:55 UTC45m
2026-07-23 EAI31Q EXT → DUB Jul 23, 19:05 UTCJul 23, 20:00 UTC55m
2026-07-23 EAI33S DUB → EXT Jul 23, 17:15 UTCJul 23, 18:10 UTC55m
2026-07-23 EAI57K EDI → DUB Jul 23, 15:35 UTCJul 23, 16:30 UTC55m
2026-07-23 EAI6RC DUB → GLA Jul 23, 13:45 UTCJul 23, 14:45 UTC1h 0m
2026-07-23 EAI13U IOM → DUB Jul 23, 12:05 UTCJul 23, 12:30 UTC25m
2026-07-23 EAI12B DUB → IOM Jul 23, 10:30 UTCJul 23, 11:05 UTC35m
2026-07-23 EAI17W MAN → DUB Jul 23, 08:40 UTCJul 23, 09:25 UTC45m
2026-07-23 EAI32V - Jul 23, 07:00 UTCJul 23, 07:45 UTC45m
2026-07-22 EAI11M - Jul 22, 20:05 UTCJul 22, 20:50 UTC45m
2026-07-22 EAI3BM DUB → MAN Jul 22, 18:35 UTCJul 22, 19:20 UTC45m
2026-07-22 EAI71G NQY → DUB Jul 22, 16:40 UTCJul 22, 17:35 UTC55m
2026-07-22 EAI62N - Jul 22, 15:05 UTCJul 22, 16:00 UTC55m
2026-07-22 EAI55YA EDI → DUB Jul 22, 13:10 UTCJul 22, 14:05 UTC55m
2026-07-22 EAI4WD - Jul 22, 11:15 UTCJul 22, 11:55 UTC40m
2026-07-21 EAI59L EDI → DUB Jul 21, 19:30 UTCJul 21, 20:25 UTC55m
2026-07-21 EAI58Z DUB → EDI Jul 21, 17:50 UTCJul 21, 18:50 UTC1h 0m
2026-07-21 EAI73B BHX → DUB Jul 21, 16:10 UTCJul 21, 17:10 UTC1h 0m
2026-07-21 EAI72V DUB → BHX Jul 21, 14:25 UTCJul 21, 15:20 UTC55m
2026-07-21 EAI65Y - Jul 21, 12:30 UTCJul 21, 13:25 UTC55m
2026-07-21 EAI64B - Jul 21, 10:35 UTCJul 21, 11:30 UTC55m
2026-07-21 EAI37E NCL → DUB Jul 21, 08:40 UTCJul 21, 09:40 UTC1h 0m
2026-07-21 EAI73N DUB → NCL Jul 21, 06:50 UTCJul 21, 07:45 UTC55m
2026-07-20 EAI11M MAN → DUB Jul 20, 20:10 UTCJul 20, 20:55 UTC45m
2026-07-20 EAI3BM DUB → MAN Jul 20, 18:20 UTCJul 20, 19:10 UTC50m
2026-07-20 EAI71G NQY → DUB Jul 20, 16:30 UTCJul 20, 17:30 UTC1h 0m
2026-07-20 EAI62N - Jul 20, 14:55 UTCJul 20, 15:50 UTC55m
2026-07-20 EAI39V LPL → DUB Jul 20, 12:50 UTCJul 20, 13:30 UTC40m
2026-07-20 EAI19L DUB → LPL Jul 20, 10:45 UTCJul 20, 11:25 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.

Mode-S 4CAD15 frequently asked

What is Mode-S code 4CAD15?
4CAD15 is an ICAO 24-bit transponder address. Allocated to Ireland.
Where is Mode-S 4CAD15 registered?
Mode-S code 4CAD15 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAD15 broadcasting right now?
Mode-S 4CAD15 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAD15, octal 23126425, decimal 5,025,045.
What flights does 4CAD15 operate?
Mode-S 4CAD15 has broadcast 20 distinct callsigns, including EAI73N, EAI4HS, EAI37E, EAI33CB, EAI19MS.