Apparatus

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sensors Mode-S transponder

4CAC1F

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-HEZ · BOEING 737 MAX 8

Hex
4CAC1F
Octal
23126037
Decimal
5,024,799
Country
IE
Tail
EI-HEZ
Type
B38M
Broadcasting now · callsign RYR8PK · 22,925 ft
Flights observed
509
Distinct callsigns
20
Country
IE
Last broadcast
1h ago

Current position

4CAC1F is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4CAC1F 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
RYR624V - 5 2026-07-07
RYR5PH - 5 2026-07-07
RYR95QF - 4 2026-07-14
RYR6KZ - 4 2026-07-13
RYR46JB Ryanair 4 2026-04-17
RYR3RM - 4 2026-04-14
RYR2WW - 4 2026-07-11
RYR2EY - 4 2026-07-11
RYR2CD - 4 2026-07-08
RYR295J - 4 2026-07-08
RYR28TH - 4 2026-04-14
RYR22GT - 4 2026-07-13
RYR12BX - 4 2026-04-17
RYR8PK - 3 2026-06-29
RYR79HT - 3 2026-07-06
RYR6WE Ryanair 3 2026-07-06
RYR6LQ - 3 2026-04-13
RYR67BD Ryanair 3 2026-05-22
RYR61BH - 3 2026-07-04
RYR3871 Ryanair 3 2026-04-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 RYR95QF - Jul 14, 07:35 UTCJul 14, 09:45 UTC2h 10m
2026-07-13 RYR6BA - Jul 13, 20:20 UTCJul 13, 22:30 UTC2h 10m
2026-07-13 RYR51RE - Jul 13, 17:30 UTCJul 13, 19:30 UTC2h 0m
2026-07-13 RYR6MH XRY → BCN Jul 13, 15:05 UTCJul 13, 16:40 UTC1h 35m
2026-07-13 RYR4RG - Jul 13, 12:20 UTCJul 13, 13:55 UTC1h 35m
2026-07-13 RYR6KZ BCN → EMA Jul 13, 08:15 UTCJul 13, 10:10 UTC1h 55m
2026-07-13 RYR22GT EMA → BCN Jul 13, 05:05 UTCJul 13, 07:01 UTC1h 55m
2026-07-12 RYR55EC - Jul 12, 22:00 UTCJul 13, 00:01 UTC2h 0m
2026-07-12 RYR77FW EMA → MAH Jul 12, 18:45 UTCJul 12, 20:45 UTC2h 0m
2026-07-12 RYR3EB - Jul 12, 15:55 UTCJul 12, 17:45 UTC1h 50m
2026-07-12 RYR6RU - Jul 12, 13:10 UTCJul 12, 14:50 UTC1h 40m
2026-07-12 RYR8MV - Jul 12, 09:45 UTCJul 12, 12:01 UTC2h 15m
2026-07-12 RYR61MJ EMA → CIA Jul 12, 06:05 UTCJul 12, 08:15 UTC2h 10m
2026-07-11 RYR6KZ BCN → EMA Jul 11, 21:00 UTCJul 11, 22:55 UTC1h 55m
2026-07-11 RYR22GT EMA → BCN Jul 11, 18:00 UTCJul 11, 19:45 UTC1h 45m
2026-07-11 RYR21DB LIG → EMA Jul 11, 14:50 UTCJul 11, 16:00 UTC1h 10m
2026-07-11 RYR3TZ LBA → WRO Jul 11, 12:35 UTCJul 11, 13:45 UTC1h 10m
2026-07-11 RYR2EY - Jul 11, 08:15 UTCJul 11, 10:45 UTC2h 30m
2026-07-11 RYR2WW EMA → FAO Jul 11, 05:01 UTCJul 11, 07:30 UTC2h 30m
2026-07-10 RYR18ZU RHO → EMA Jul 10, 18:40 UTCJul 10, 22:35 UTC3h 55m
2026-07-10 RYR5RD EMA → RHO Jul 10, 13:50 UTCJul 10, 17:25 UTC3h 35m
2026-07-10 RYR2EY FAO → EMA Jul 10, 09:40 UTCJul 10, 12:05 UTC2h 25m
2026-07-10 RYR2WW EMA → FAO Jul 10, 06:15 UTCJul 10, 08:50 UTC2h 35m
2026-07-09 RYR25UZ - Jul 9, 18:50 UTCJul 9, 20:35 UTC1h 45m
2026-07-09 RYR6571 EMA → TSF Jul 9, 16:15 UTCJul 9, 18:00 UTC1h 45m
2026-07-09 RYR38WH - Jul 9, 13:30 UTCJul 9, 15:10 UTC1h 40m
2026-07-09 RYR8958 ARN → MLA Jul 9, 10:55 UTCJul 9, 12:40 UTC1h 45m
2026-07-09 RYR62AD WRO → EMA Jul 9, 08:10 UTCJul 9, 10:00 UTC1h 50m
2026-07-09 RYR24FF EMA → WRO Jul 9, 05:20 UTCJul 9, 07:05 UTC1h 45m
2026-07-08 RYR55FV - Jul 8, 20:00 UTCJul 8, 22:05 UTC2h 5m
2026-07-08 RYR92ZR EMA → ALC Jul 8, 16:35 UTCJul 8, 18:50 UTC2h 15m
2026-07-08 RYR10NM - Jul 8, 13:35 UTCJul 8, 15:35 UTC2h 0m
2026-07-08 RYR3LL - Jul 8, 10:15 UTCJul 8, 12:20 UTC2h 5m
2026-07-08 RYR2CD - Jul 8, 08:05 UTCJul 8, 09:30 UTC1h 25m
2026-07-08 RYR295J EMA → EGC Jul 8, 05:55 UTCJul 8, 07:10 UTC1h 15m
2026-07-07 RYR1665 - Jul 7, 21:05 UTCJul 7, 23:35 UTC2h 30m
2026-07-07 RYR1664 EMA → RIX Jul 7, 18:00 UTCJul 7, 20:10 UTC2h 10m
2026-07-07 RYR5PH - Jul 7, 14:35 UTCJul 7, 17:00 UTC2h 25m
2026-07-07 RYR624V - Jul 7, 11:20 UTCJul 7, 13:30 UTC2h 10m
2026-07-07 RYR62LK - Jul 7, 09:45 UTCJul 7, 10:25 UTC40m
2026-07-07 RYR535 EMA → DUB Jul 7, 08:05 UTCJul 7, 08:45 UTC40m
2026-07-06 RYR79HT - Jul 6, 21:00 UTCJul 7, 00:45 UTC3h 45m
2026-07-06 RYR6WE RAK → RAK Jul 6, 16:35 UTCJul 6, 19:55 UTC3h 20m
2026-07-06 RYR2AG CRL → TFS Jul 6, 10:10 UTCJul 6, 13:55 UTC3h 45m
2026-07-06 RYR3701 - Jul 6, 05:15 UTCJul 6, 09:00 UTC3h 45m
2026-07-05 RYR55EC MAH → EMA Jul 5, 20:45 UTCJul 5, 23:00 UTC2h 15m
2026-07-05 RYR77FW EMA → MAH Jul 5, 17:55 UTCJul 5, 19:50 UTC1h 55m
2026-07-05 RYR55FV - Jul 5, 14:40 UTCJul 5, 17:00 UTC2h 20m
2026-07-05 RYR92ZR - Jul 5, 11:20 UTCJul 5, 13:30 UTC2h 10m
2026-07-05 RYR2CD KRK → TFS Jul 5, 09:10 UTCJul 5, 10:35 UTC1h 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-HEZ page for operator, model, and routing details .

Mode-S 4CAC1F frequently asked

What is Mode-S code 4CAC1F?
4CAC1F is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-HEZ.
Where is Mode-S 4CAC1F registered?
Mode-S code 4CAC1F is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAC1F broadcasting right now?
Yes. Mode-S 4CAC1F is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAC1F, octal 23126037, decimal 5,024,799.
What flights does 4CAC1F operate?
Mode-S 4CAC1F has broadcast 20 distinct callsigns, including RYR624V, RYR5PH, RYR95QF, RYR6KZ, RYR46JB.