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sensors Mode-S transponder

4CAA55

ICAO 24-bit transponder address · allocated to Ireland

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

Hex
4CAA55
Octal
23125125
Decimal
5,024,341
Country
IE
Tail
EI-GPP
Type
AT76
Broadcasting now · callsign EAI3350 · 2,475 ft
Flights observed
772
Distinct callsigns
20
Country
IE
Last broadcast
Jul 26, 19:25 UTC

Current position

4CAA55 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4CAA55 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
EAI48D Elite Air 16 2026-07-24
EAI17N Elite Air 16 2026-07-24
EAI16M Elite Air 16 2026-07-24
EAI32V Elite Air 14 2026-07-24
EAI17W - 14 2026-07-24
EAI33S Elite Air 13 2026-07-26
EAI31Q Elite Air 13 2026-07-26
EAI6RC Elite Air 12 2026-07-26
EAI57K Elite Air 12 2026-07-26
EAI54VJ Elite Air 12 2026-07-25
EAI41D Elite Air 12 2026-07-25
EAI3HP Elite Air 12 2026-07-20
EAI71G Elite Air 11 2026-07-25
EAI65Y - 11 2026-06-28
EAI64B - 11 2026-06-28
EAI43D - 11 2026-07-24
EAI31F - 11 2026-07-20
EAI23C - 11 2026-07-05
EAI22MW - 11 2026-07-05
EAI8BR - 10 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EAI31Q EXT → DUB Jul 26, 18:15 UTCJul 26, 19:15 UTC1h 0m
2026-07-26 EAI33S DUB → EXT Jul 26, 16:35 UTCJul 26, 17:30 UTC55m
2026-07-26 EAI57K EDI → DUB Jul 26, 15:05 UTCJul 26, 15:55 UTC50m
2026-07-26 EAI6RC DUB → GLA Jul 26, 13:20 UTCJul 26, 14:15 UTC55m
2026-07-26 EAI13U IOM → DUB Jul 26, 12:00 UTCJul 26, 12:25 UTC25m
2026-07-26 EAI12B DUB → IOM Jul 26, 10:40 UTCJul 26, 11:10 UTC30m
2026-07-25 EAI75B - Jul 25, 17:40 UTCJul 25, 18:35 UTC55m
2026-07-25 EAI74G DUB → BHX Jul 25, 16:00 UTCJul 25, 16:50 UTC50m
2026-07-25 EAI71G NQY → DUB Jul 25, 14:10 UTCJul 25, 15:10 UTC1h 0m
2026-07-25 EAI62N DUB → NQY Jul 25, 12:30 UTCJul 25, 13:30 UTC1h 0m
2026-07-25 EAI55SK EDI → DUB Jul 25, 10:35 UTCJul 25, 11:30 UTC55m
2026-07-25 EAI54VJ DUB → EDI Jul 25, 08:50 UTCJul 25, 09:45 UTC55m
2026-07-25 EAI41D CFN → DUB Jul 25, 06:55 UTCJul 25, 07:40 UTC45m
2026-07-24 EAI48D DUB → CFN Jul 24, 18:10 UTCJul 24, 18:50 UTC40m
2026-07-24 EAI17N IOM → DUB Jul 24, 17:05 UTCJul 24, 17:30 UTC25m
2026-07-24 EAI16M DUB → IOM Jul 24, 15:55 UTCJul 24, 16:25 UTC30m
2026-07-24 EAI43D - Jul 24, 14:30 UTCJul 24, 15:10 UTC40m
2026-07-24 EAI42D DUB → CFN Jul 24, 13:10 UTCJul 24, 13:50 UTC40m
2026-07-24 EAI13U IOM → DUB Jul 24, 11:45 UTCJul 24, 12:10 UTC25m
2026-07-24 EAI12B DUB → IOM Jul 24, 10:25 UTCJul 24, 10:50 UTC25m
2026-07-24 EAI17W MAN → DUB Jul 24, 08:45 UTCJul 24, 09:30 UTC45m
2026-07-24 EAI32V DUB → MAN Jul 24, 07:10 UTCJul 24, 07:55 UTC45m
2026-07-23 EAI46Z LPL → DUB Jul 23, 21:45 UTCJul 23, 22:25 UTC40m
2026-07-23 EAI36W DUB → LPL Jul 23, 20:20 UTCJul 23, 21:05 UTC45m
2026-07-23 EAI75B - Jul 23, 18:20 UTCJul 23, 19:10 UTC50m
2026-07-23 EAI74G DUB → BHX Jul 23, 16:30 UTCJul 23, 17:25 UTC55m
2026-07-23 EAI85Y BRS → BRS Jul 23, 14:45 UTCJul 23, 15:45 UTC1h 0m
2026-07-23 EAI84U DUB → BRS Jul 23, 13:05 UTCJul 23, 14:05 UTC1h 0m
2026-07-23 EAI55SK EDI → DUB Jul 23, 11:10 UTCJul 23, 12:10 UTC1h 0m
2026-07-23 EAI54VJ DUB → EDI Jul 23, 08:40 UTCJul 23, 09:45 UTC1h 5m
2026-07-23 EAI41D - Jul 23, 07:05 UTCJul 23, 07:55 UTC50m
2026-07-22 EAI48D DUB → CFN Jul 22, 18:30 UTCJul 22, 19:10 UTC40m
2026-07-22 EAI17N IOM → DUB Jul 22, 16:45 UTCJul 22, 17:15 UTC30m
2026-07-22 EAI16M DUB → IOM Jul 22, 15:20 UTCJul 22, 16:00 UTC40m
2026-07-22 EAI43D - Jul 22, 13:40 UTCJul 22, 14:20 UTC40m
2026-07-22 EAI42D DUB → CFN Jul 22, 12:10 UTCJul 22, 12:50 UTC40m
2026-07-21 EAI75B - Jul 21, 17:55 UTCJul 21, 18:55 UTC1h 0m
2026-07-21 EAI74G DUB → BHX Jul 21, 16:10 UTCJul 21, 17:05 UTC55m
2026-07-21 EAI85Y BRS → BRS Jul 21, 14:25 UTCJul 21, 15:30 UTC1h 5m
2026-07-21 EAI84U DUB → BRS Jul 21, 12:35 UTCJul 21, 13:35 UTC1h 0m
2026-07-21 EAI54VJ DUB → EDI Jul 21, 10:30 UTCJul 21, 11:20 UTC50m
2026-07-21 EAI54VJ DUB → EDI Jul 21, 08:40 UTCJul 21, 09:45 UTC1h 5m
2026-07-21 EAI41D - Jul 21, 07:05 UTCJul 21, 07:45 UTC40m
2026-07-20 EAI48D DUB → CFN Jul 20, 17:55 UTCJul 20, 18:35 UTC40m
2026-07-20 EAI17N IOM → DUB Jul 20, 16:25 UTCJul 20, 16:50 UTC25m
2026-07-20 EAI16M DUB → IOM Jul 20, 15:10 UTCJul 20, 15:40 UTC30m
2026-07-20 EAI43D - Jul 20, 13:35 UTCJul 20, 14:10 UTC35m
2026-07-20 EAI02D - Jul 20, 12:10 UTCJul 20, 12:45 UTC35m
2026-07-20 EAI31F EDI → DUB Jul 20, 09:10 UTCJul 20, 10:10 UTC1h 0m
2026-07-20 EAI3HP DUB → EDI Jul 20, 07:15 UTCJul 20, 08:20 UTC1h 5m

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

Mode-S 4CAA55 frequently asked

What is Mode-S code 4CAA55?
4CAA55 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-GPP.
Where is Mode-S 4CAA55 registered?
Mode-S code 4CAA55 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAA55 broadcasting right now?
Yes. Mode-S 4CAA55 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAA55, octal 23125125, decimal 5,024,341.
What flights does 4CAA55 operate?
Mode-S 4CAA55 has broadcast 20 distinct callsigns, including EAI48D, EAI17N, EAI16M, EAI32V, EAI17W.