Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 3h ago
Flights observed
693
Distinct callsigns
20
Country
IE
Last broadcast
3h 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
EAI55SK - 15 2026-07-14
EAI54VJ - 15 2026-07-14
EAI41D - 15 2026-07-14
EAI16M Elite Air 13 2026-07-13
EAI59L - 12 2026-07-10
EAI57K Elite Air 12 2026-07-22
EAI8BR Elite Air 11 2026-07-23
EAI81A - 11 2026-07-23
EAI6RC Elite Air 11 2026-07-22
EAI58Z Elite Air 11 2026-07-24
EAI89DF - 10 2026-07-23
EAI65Y - 10 2026-07-16
EAI64B - 10 2026-07-16
EAI48D Elite Air 10 2026-07-13
EAI43D - 10 2026-07-13
EAI42D Elite Air 10 2026-07-13
EAI38D - 10 2026-07-22
EAI37E - 10 2026-07-16
EAI33CB - 10 2026-07-20
EAI19MS Elite Air 10 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 EAI59C EDI → DUB Jul 24, 19:35 UTCJul 24, 20:30 UTC55m
2026-07-24 EAI58Z DUB → EDI Jul 24, 17:50 UTCJul 24, 18:50 UTC1h 0m
2026-07-24 EAI73B BHX → DUB Jul 24, 15:55 UTCJul 24, 17:00 UTC1h 5m
2026-07-24 EAI72V DUB → BHX Jul 24, 14:00 UTCJul 24, 15:00 UTC1h 0m
2026-07-24 EAI67F MAN → DUB Jul 24, 12:25 UTCJul 24, 13:10 UTC45m
2026-07-24 EAI66L DUB → MAN Jul 24, 10:35 UTCJul 24, 11:25 UTC50m
2026-07-24 EAI33X EDI → DUB Jul 24, 08:50 UTCJul 24, 09:45 UTC55m
2026-07-24 EAI5ED DUB → EDI Jul 24, 06:40 UTCJul 24, 07:35 UTC55m
2026-07-23 EAI89DF - Jul 23, 20:05 UTCJul 23, 21:05 UTC1h 0m
2026-07-23 EAI17C ORK → BRS Jul 23, 18:25 UTCJul 23, 19:25 UTC1h 0m
2026-07-23 EAI18K BRS → ORK Jul 23, 16:30 UTCJul 23, 17:35 UTC1h 5m
2026-07-23 EAI71G NQY → DUB Jul 23, 14:40 UTCJul 23, 15:35 UTC55m
2026-07-23 EAI71G NQY → DUB Jul 23, 12:40 UTCJul 23, 13:40 UTC1h 0m
2026-07-23 EAI62N - Jul 23, 11:00 UTCJul 23, 12:00 UTC1h 0m
2026-07-23 EAI81A BRS → DUB Jul 23, 07:50 UTCJul 23, 08:50 UTC1h 0m
2026-07-23 EAI8BR DUB → BRS Jul 23, 06:05 UTCJul 23, 07:00 UTC55m
2026-07-22 EAI78R - Jul 22, 19:20 UTCJul 22, 20:50 UTC1h 30m
2026-07-22 EAI61L DUB → JER Jul 22, 17:20 UTCJul 22, 18:35 UTC1h 15m
2026-07-22 EAI57K EDI → DUB Jul 22, 15:30 UTCJul 22, 16:25 UTC55m
2026-07-22 EAI6RC DUB → GLA Jul 22, 13:35 UTCJul 22, 14:35 UTC1h 0m
2026-07-22 EAI38D MAN → DUB Jul 22, 11:40 UTCJul 22, 12:15 UTC35m
2026-07-21 EAI89DF BRS → DUB Jul 21, 19:40 UTCJul 21, 20:30 UTC50m
2026-07-21 EAI17C ORK → BRS Jul 21, 17:45 UTCJul 21, 18:50 UTC1h 5m
2026-07-21 EAI18K BRS → ORK Jul 21, 15:50 UTCJul 21, 16:55 UTC1h 5m
2026-07-21 EAI86W DUB → BRS Jul 21, 14:00 UTCJul 21, 15:00 UTC1h 0m
2026-07-21 EAI53BS EDI → DUB Jul 21, 11:50 UTCJul 21, 12:45 UTC55m
2026-07-21 EAI52NE DUB → EDI Jul 21, 10:10 UTCJul 21, 11:10 UTC1h 0m
2026-07-21 EAI21HA GLA → DUB Jul 21, 07:40 UTCJul 21, 08:30 UTC50m
2026-07-21 EAI2GL DUB → GLA Jul 21, 06:10 UTCJul 21, 07:00 UTC50m
2026-07-20 EAI95C LBA → DUB Jul 20, 20:10 UTCJul 20, 21:05 UTC55m
2026-07-20 EAI94S DUB → LBA Jul 20, 18:30 UTCJul 20, 19:20 UTC50m
2026-07-20 EAI19MS MAN → DUB Jul 20, 16:55 UTCJul 20, 17:40 UTC45m
2026-07-20 EAI33CB DUB → MAN Jul 20, 15:20 UTCJul 20, 16:10 UTC50m
2026-07-20 EAI55YA EDI → DUB Jul 20, 13:10 UTCJul 20, 14:05 UTC55m
2026-07-20 EAI4WD DUB → EDI Jul 20, 11:20 UTCJul 20, 12:25 UTC1h 5m
2026-07-20 EAI34N ABZ → DUB Jul 20, 08:55 UTCJul 20, 10:00 UTC1h 5m
2026-07-20 EAI42A DUB → ABZ Jul 20, 06:50 UTCJul 20, 08:10 UTC1h 20m
2026-07-19 EAI95C LBA → DUB Jul 19, 19:15 UTCJul 19, 20:05 UTC50m
2026-07-19 EAI94S DUB → LBA Jul 19, 17:40 UTCJul 19, 18:30 UTC50m
2026-07-19 EAI93D LBA → LBA Jul 19, 16:00 UTCJul 19, 16:50 UTC50m
2026-07-19 EAI92B DUB → LBA Jul 19, 14:20 UTCJul 19, 15:15 UTC55m
2026-07-19 EAI38D - Jul 19, 12:35 UTCJul 19, 13:25 UTC50m
2026-07-19 EAI69M DUB → MAN Jul 19, 10:45 UTCJul 19, 11:35 UTC50m
2026-07-19 EAI91M LBA → DUB Jul 19, 08:35 UTCJul 19, 09:20 UTC45m
2026-07-19 EAI19L DUB → LPL Jul 19, 06:40 UTCJul 19, 07:35 UTC55m
2026-07-18 EAI29GA GLA → DUB Jul 18, 20:30 UTCJul 18, 21:20 UTC50m
2026-07-18 EAI28QB DUB → GLA Jul 18, 18:50 UTCJul 18, 19:40 UTC50m
2026-07-18 EAI31Q EXT → DUB Jul 18, 16:40 UTCJul 18, 17:45 UTC1h 5m
2026-07-18 EAI33S DUB → EXT Jul 18, 15:00 UTCJul 18, 15:50 UTC50m
2026-07-18 EAI81A BRS → DUB Jul 18, 12:15 UTCJul 18, 13:25 UTC1h 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-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 3h 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 EAI55SK, EAI54VJ, EAI41D, EAI16M, EAI59L.