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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
No current signal · last broadcast 6h ago
Flights observed
688
Distinct callsigns
20
Country
IE
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 4CAA55.

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 13 2026-07-03
EAI17N Elite Air 13 2026-07-03
EAI16M Elite Air 13 2026-07-03
EAI32V - 12 2026-07-14
EAI17W - 12 2026-07-14
EAI6RC Elite Air 11 2026-07-12
EAI65Y - 11 2026-06-28
EAI64B - 11 2026-06-28
EAI57K Elite Air 11 2026-07-12
EAI3HP - 11 2026-07-11
EAI33S Elite Air 11 2026-07-12
EAI31Q Elite Air 11 2026-07-12
EAI23C - 11 2026-07-05
EAI22MW - 11 2026-07-05
EAI71G Elite Air 10 2026-07-08
EAI31F - 10 2026-07-11
EAI19L - 10 2026-07-13
EAI8BR - 9 2026-06-28
EAI73N Elite Air 9 2026-06-07
EAI62N - 9 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 EAI11M MAN → DUB Jul 14, 20:00 UTCJul 14, 20:45 UTC45m
2026-07-14 EAI3BM DUB → MAN Jul 14, 18:25 UTCJul 14, 19:10 UTC45m
2026-07-14 EAI19MS MAN → DUB Jul 14, 16:50 UTCJul 14, 17:45 UTC55m
2026-07-14 EAI33CB DUB → MAN Jul 14, 15:15 UTCJul 14, 16:05 UTC50m
2026-07-14 EAI4WD - Jul 14, 12:55 UTCJul 14, 14:05 UTC1h 10m
2026-07-14 EAI4WD DUB → EDI Jul 14, 11:10 UTCJul 14, 12:10 UTC1h 0m
2026-07-14 EAI17W MAN → DUB Jul 14, 08:50 UTCJul 14, 09:45 UTC55m
2026-07-14 EAI32V DUB → MAN Jul 14, 06:50 UTCJul 14, 07:40 UTC50m
2026-07-13 EAI46Z LPL → DUB Jul 13, 20:25 UTCJul 13, 21:05 UTC40m
2026-07-13 EAI36W DUB → LPL Jul 13, 18:45 UTCJul 13, 19:25 UTC40m
2026-07-13 EAI2A SOU → DUB Jul 13, 16:45 UTCJul 13, 18:00 UTC1h 15m
2026-07-13 EAI4HS DUB → SOU Jul 13, 14:35 UTCJul 13, 16:00 UTC1h 25m
2026-07-13 EAI39V LPL → DUB Jul 13, 12:45 UTCJul 13, 13:35 UTC50m
2026-07-13 EAI19L DUB → LPL Jul 13, 11:10 UTCJul 13, 11:55 UTC45m
2026-07-13 EAI23GA GLA → DUB Jul 13, 08:35 UTCJul 13, 09:45 UTC1h 10m
2026-07-13 EAI25G DUB → GLA Jul 13, 06:55 UTCJul 13, 07:45 UTC50m
2026-07-12 EAI31Q EXT → DUB Jul 12, 18:45 UTCJul 12, 19:50 UTC1h 5m
2026-07-12 EAI33S DUB → EXT Jul 12, 16:55 UTCJul 12, 17:55 UTC1h 0m
2026-07-12 EAI57K EDI → DUB Jul 12, 15:01 UTCJul 12, 16:01 UTC1h 0m
2026-07-12 EAI6RC DUB → GLA Jul 12, 13:10 UTCJul 12, 14:05 UTC55m
2026-07-12 EAI13U - Jul 12, 11:40 UTCJul 12, 12:10 UTC30m
2026-07-12 EAI12B - Jul 12, 10:45 UTCJul 12, 11:05 UTC20m
2026-07-12 EAI17W MAN → DUB Jul 12, 08:50 UTCJul 12, 09:45 UTC55m
2026-07-12 EAI32V DUB → MAN Jul 12, 07:01 UTCJul 12, 07:45 UTC45m
2026-07-11 EAI29GA GLA → DUB Jul 11, 21:20 UTCJul 11, 22:15 UTC55m
2026-07-11 EAI28QB DUB → GLA Jul 11, 19:40 UTCJul 11, 20:35 UTC55m
2026-07-11 EAI31Q EXT → DUB Jul 11, 17:45 UTCJul 11, 18:45 UTC1h 0m
2026-07-11 EAI33S DUB → EXT Jul 11, 16:00 UTCJul 11, 17:00 UTC1h 0m
2026-07-11 EAI3RG EDI → DUB Jul 11, 13:55 UTCJul 11, 15:00 UTC1h 5m
2026-07-11 EAI35C DUB → EDI Jul 11, 11:45 UTCJul 11, 12:50 UTC1h 5m
2026-07-11 EAI31F - Jul 11, 09:20 UTCJul 11, 10:25 UTC1h 5m
2026-07-11 EAI3HP - Jul 11, 07:10 UTCJul 11, 08:15 UTC1h 5m
2026-07-10 EAI46Z - Jul 10, 20:15 UTCJul 10, 21:00 UTC45m
2026-07-10 EAI36W DUB → LPL Jul 10, 18:40 UTCJul 10, 19:25 UTC45m
2026-07-10 EAI4HS - Jul 10, 16:30 UTCJul 10, 17:45 UTC1h 15m
2026-07-10 EAI4HS DUB → SOU Jul 10, 14:35 UTCJul 10, 15:50 UTC1h 15m
2026-07-10 EAI13U - Jul 10, 12:50 UTCJul 10, 13:30 UTC40m
2026-07-10 EAI12B DUB → IOM Jul 10, 11:40 UTCJul 10, 12:10 UTC30m
2026-07-10 EAI31F - Jul 10, 09:20 UTCJul 10, 10:30 UTC1h 10m
2026-07-10 EAI3HP DUB → EDI Jul 10, 07:15 UTCJul 10, 08:15 UTC1h 0m
2026-07-09 EAI95C LBA → DUB Jul 9, 19:20 UTCJul 9, 20:10 UTC50m
2026-07-09 EAI94S DUB → LBA Jul 9, 17:50 UTCJul 9, 18:40 UTC50m
2026-07-09 EAI73B BHX → DUB Jul 9, 16:00 UTCJul 9, 17:05 UTC1h 5m
2026-07-09 EAI72V DUB → BHX Jul 9, 14:15 UTCJul 9, 15:15 UTC1h 0m
2026-07-09 EAI39V LPL → DUB Jul 9, 12:20 UTCJul 9, 12:55 UTC35m
2026-07-09 EAI19L - Jul 9, 10:40 UTCJul 9, 11:20 UTC40m
2026-07-09 EAI33X EDI → DUB Jul 9, 08:40 UTCJul 9, 09:35 UTC55m
2026-07-09 EAI5ED - Jul 9, 06:30 UTCJul 9, 07:40 UTC1h 10m
2026-07-08 EAI11M - Jul 8, 19:55 UTCJul 8, 20:40 UTC45m
2026-07-08 EAI3BM - Jul 8, 18:25 UTCJul 8, 19:15 UTC50m

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?
No active broadcast right now. Last signal was 6h ago.
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.