Apparatus

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sensors Mode-S transponder

4CAC85

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-HGH · BOEING 737 MAX 8

Hex
4CAC85
Octal
23126205
Decimal
5,024,901
Country
IE
Tail
EI-HGH
Type
B38M
No current signal · last broadcast 4h ago
Flights observed
247
Distinct callsigns
20
Country
IE
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 4CAC85.

Country allocation

The ICAO 24-bit address 4CAC85 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
RYR55KV Ryanair 4 2026-04-30
RYR9XB - 3 2026-04-13
RYR8G - 3 2026-04-13
RYR7TR Ryanair 3 2026-04-13
RYR7JT Ryanair 3 2026-04-27
RYR4XJ Ryanair 3 2026-04-19
RYR4NJ - 3 2026-04-17
RYR27RR Ryanair 3 2026-04-19
RYR99TH Ryanair 2 2026-05-17
RYR95TC - 2 2026-04-17
RYR93SP Ryanair 2 2026-05-15
RYR90SF Ryanair 2 2026-05-09
RYR90FP Ryanair 2 2026-04-14
RYR8ZP Ryanair 2 2026-05-15
RYR8NZ Ryanair 2 2026-05-15
RYR7ZL Ryanair 2 2026-05-04
RYR7RC - 2 2026-04-15
RYR7FD - 2 2026-04-15
RYR79WQ - 2 2026-04-16
RYR749C Ryanair 2 2026-05-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 RYR91EJ CAG → BGY May 29, 20:05 UTCMay 29, 21:05 UTC1h 0m
2026-05-29 RYR6AQ BHX → GNB May 29, 18:05 UTCMay 29, 19:00 UTC55m
2026-05-29 RYR75ZH CTA → BGY May 29, 15:55 UTCMay 29, 17:15 UTC1h 20m
2026-05-29 RYR7EK CIA → LIS May 29, 13:20 UTCMay 29, 14:40 UTC1h 20m
2026-05-29 RYR52XB KRK → BGY May 29, 10:55 UTCMay 29, 12:10 UTC1h 15m
2026-05-29 RYR76PX BGY → KRK May 29, 08:40 UTCMay 29, 10:05 UTC1h 25m
2026-05-29 RYR18JC PRG → BGY May 29, 06:20 UTCMay 29, 07:25 UTC1h 5m
2026-05-29 RYR6NV STN → TSF May 29, 04:25 UTCMay 29, 05:30 UTC1h 5m
2026-05-28 RYR30DK KRK → BGY May 28, 22:15 UTCMay 28, 23:35 UTC1h 20m
2026-05-28 RYR2DL BRS → VIE May 28, 19:55 UTCMay 28, 21:25 UTC1h 30m
2026-05-28 RYR115D PRG → BGY May 28, 15:50 UTCMay 28, 17:00 UTC1h 10m
2026-05-28 RYR80WD MLA → ZAG May 28, 13:50 UTCMay 28, 15:00 UTC1h 10m
2026-05-27 RYR91SU IAS → BGY May 27, 17:20 UTCMay 27, 18:50 UTC1h 30m
2026-05-27 RYR4MM BLQ → CTA May 27, 13:45 UTCMay 27, 15:50 UTC2h 5m
2026-05-27 RYR62FP ALC → MXP May 27, 08:55 UTCMay 27, 10:15 UTC1h 20m
2026-05-27 RYR38HN BGY → CRV May 27, 06:40 UTCMay 27, 07:55 UTC1h 15m
2026-05-26 RYR7BE EDI → GDN May 26, 21:40 UTCMay 26, 22:59 UTC1h 20m
2026-05-26 RYR1TP ARN → GDN May 26, 18:45 UTCMay 26, 19:55 UTC1h 10m
2026-05-26 RYR1138 STN → STN May 26, 12:40 UTCMay 26, 15:20 UTC2h 40m
2026-05-22 RYR59QZ LPL → KUN May 22, 08:35 UTCMay 22, 10:55 UTC2h 20m
2026-05-22 RYR2SM REU → LPL May 22, 07:05 UTCMay 22, 07:35 UTC30m
2026-05-21 RYR53ZL HAM → STN May 21, 22:15 UTCMay 22, 00:10 UTC1h 55m
2026-05-21 RYR20ZC DUB → MXP May 21, 19:15 UTCMay 21, 21:10 UTC1h 55m
2026-05-21 RYR45KP LGW → DUB May 21, 17:35 UTCMay 21, 18:25 UTC50m
2026-05-21 RYR61SV DUB → LGW May 21, 15:00 UTCMay 21, 16:05 UTC1h 5m
2026-05-21 RYR986M CAG → DUB May 21, 10:40 UTCMay 21, 13:30 UTC2h 50m
2026-05-21 RYR33RX DUB → CAG May 21, 06:20 UTCMay 21, 08:55 UTC2h 35m
2026-05-20 RYR68JW SPU → DUB May 20, 21:55 UTCMay 21, 00:30 UTC2h 35m
2026-05-20 RYR5CP STN → KRK May 20, 18:15 UTCMay 20, 20:25 UTC2h 10m
2026-05-20 RYR23BF EDI → DUB May 20, 16:30 UTCMay 20, 17:05 UTC35m
2026-05-20 RYR812 DUB → EDI May 20, 14:40 UTCMay 20, 15:25 UTC45m
2026-05-20 RYR3QZ DUB → ACE May 20, 11:00 UTCMay 20, 13:35 UTC2h 35m
2026-05-20 RYR40TF DUB → PMI May 20, 05:55 UTCMay 20, 08:00 UTC2h 5m
2026-05-19 RYR9FM FEZ → BOD May 19, 20:50 UTCMay 19, 23:55 UTC3h 5m
2026-05-19 RYR29HK KRK → EDI May 19, 17:10 UTCMay 19, 19:55 UTC2h 45m
2026-05-19 RYR69LM MXP → DUB May 19, 13:45 UTCMay 19, 15:55 UTC2h 10m
2026-05-19 RYR2VC ARN → RIX May 19, 10:15 UTCMay 19, 12:20 UTC2h 5m
2026-05-19 RYR2AJ BVA → FNC May 19, 08:35 UTCMay 19, 09:20 UTC45m
2026-05-19 RYR554 DUB → MAN May 19, 07:10 UTCMay 19, 07:45 UTC35m
2026-05-17 RYR99TH LIS → DUB May 17, 22:35 UTCMay 18, 01:00 UTC2h 25m
2026-05-17 RYR99TH LIS → DUB May 17, 21:55 UTCMay 17, 22:15 UTC20m
2026-05-17 RYR4XW BGY → BVA May 17, 19:15 UTCMay 17, 21:30 UTC2h 15m
2026-05-17 RYR6FH EDI → LIS May 17, 17:25 UTCMay 17, 18:01 UTC35m
2026-05-17 RYR69KF DUB → KIR May 17, 16:10 UTCMay 17, 16:40 UTC30m
2026-05-17 RYR8669 PMI → CGN May 17, 12:25 UTCMay 17, 14:45 UTC2h 20m
2026-05-17 RYR28TK ORK → MAN May 17, 09:00 UTCMay 17, 11:05 UTC2h 5m
2026-05-17 RYR28GL BRS → DUB May 17, 07:00 UTCMay 17, 07:40 UTC40m
2026-05-17 RYR57YU DUB → BRS May 17, 05:05 UTCMay 17, 05:45 UTC40m
2026-05-15 RYR8ZP FCO → DUB May 15, 19:15 UTCMay 15, 21:55 UTC2h 40m
2026-05-15 RYR93SP DUB → FCO May 15, 15:35 UTCMay 15, 18:00 UTC2h 25m

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

Mode-S 4CAC85 frequently asked

What is Mode-S code 4CAC85?
4CAC85 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-HGH.
Where is Mode-S 4CAC85 registered?
Mode-S code 4CAC85 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAC85 broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAC85, octal 23126205, decimal 5,024,901.
What flights does 4CAC85 operate?
Mode-S 4CAC85 has broadcast 20 distinct callsigns, including RYR55KV, RYR9XB, RYR8G, RYR7TR, RYR7JT.