Apparatus

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sensors Mode-S transponder

4CAFC3

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-GXH · BOEING 737-800

Hex
4CAFC3
Octal
23127703
Decimal
5,025,731
Country
IE
Tail
EI-GXH
Type
B738
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
695
Distinct callsigns
20
Country
IE
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S 4CAFC3.

Country allocation

The ICAO 24-bit address 4CAFC3 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
RYR961A - 5 2026-07-20
RYR8593 - 5 2026-07-17
RYR7EQ - 5 2026-07-20
RYR9SK Ryanair 4 2026-06-06
RYR8XK Ryanair 4 2026-06-12
RYR8QZ Ryanair 4 2026-06-16
RYR8BF Ryanair 4 2026-06-14
RYR8592 - 4 2026-07-15
RYR8336 - 4 2026-07-16
RYR7CJ - 4 2026-07-18
RYR6095 Ryanair 4 2026-06-06
RYR520K Ryanair 4 2026-06-16
RYR4VL Ryanair 4 2026-06-12
RYR4PK - 4 2026-07-18
RYR423B Ryanair 4 2026-07-17
RYR420Z - 4 2026-06-17
RYR204M - 4 2026-06-17
RYR1WX Ryanair 4 2026-07-17
RYR12RM - 4 2026-07-16
RYR088 Ryanair 4 2026-05-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RYR96DK PMI → BCN Jul 26, 22:15 UTCJul 26, 22:45 UTC30m
2026-07-26 RYR2495 BCN → PMI Jul 26, 20:35 UTCJul 26, 21:10 UTC35m
2026-07-26 RYR7EM DUB → CLJ Jul 26, 17:40 UTCJul 26, 19:10 UTC1h 30m
2026-07-26 RYR9KG EGC → STN Jul 26, 15:05 UTCJul 26, 16:55 UTC1h 50m
2026-07-26 RYR96RZ OPO → BCN Jul 26, 12:25 UTCJul 26, 13:50 UTC1h 25m
2026-07-26 RYR30UJ BCN → OPO Jul 26, 10:10 UTCJul 26, 11:30 UTC1h 20m
2026-07-25 RYR7UH WMI → BRI Jul 25, 23:20 UTCJul 26, 01:00 UTC1h 40m
2026-07-25 RYR70ST BCN → PMO Jul 25, 19:50 UTCJul 25, 21:05 UTC1h 15m
2026-07-25 RYR748H PEG → BCN Jul 25, 17:00 UTCJul 25, 18:35 UTC1h 35m
2026-07-25 RYR9RQ FKB → ALC Jul 25, 09:05 UTCJul 25, 10:40 UTC1h 35m
2026-07-25 RYR28UR OPO → BCN Jul 25, 06:30 UTCJul 25, 08:00 UTC1h 30m
2026-07-25 RYR1CV DUB → KIR Jul 25, 04:05 UTCJul 25, 05:40 UTC1h 35m
2026-07-24 RYR3175 IBZ → BCN Jul 24, 22:15 UTCJul 24, 22:50 UTC35m
2026-07-24 RYR3174 BCN → IBZ Jul 24, 20:50 UTCJul 24, 21:30 UTC40m
2026-07-24 RYR79JM - Jul 24, 17:20 UTCJul 24, 19:35 UTC2h 15m
2026-07-24 RYR40SX MAN → OPO Jul 24, 14:10 UTCJul 24, 16:25 UTC2h 15m
2026-07-24 RYR38MR BHX → BCN Jul 24, 10:40 UTCJul 24, 12:40 UTC2h 0m
2026-07-24 RYR6PG AGP → RAK Jul 24, 07:50 UTCJul 24, 09:40 UTC1h 50m
2026-07-24 RYR8978 AHO → BCN Jul 24, 05:35 UTCJul 24, 06:45 UTC1h 10m
2026-07-24 RYR68GQ BCN → AHO Jul 24, 03:50 UTCJul 24, 04:45 UTC55m
2026-07-23 RYR2403 SVQ → BCN Jul 23, 22:10 UTCJul 23, 23:25 UTC1h 15m
2026-07-23 RYR4ZP - Jul 23, 20:00 UTCJul 23, 21:25 UTC1h 25m
2026-07-23 RYR1FR TRN → NAP Jul 23, 17:20 UTCJul 23, 18:50 UTC1h 30m
2026-07-23 RYR87CX BCN → BRU Jul 23, 14:40 UTCJul 23, 16:25 UTC1h 45m
2026-07-23 RYR36PL EDI → BCN Jul 23, 10:10 UTCJul 23, 12:25 UTC2h 15m
2026-07-23 RYR73KY BCN → EDI Jul 23, 06:50 UTCJul 23, 09:15 UTC2h 25m
2026-07-23 RYR36HD BLQ → BCN Jul 23, 04:15 UTCJul 23, 05:35 UTC1h 20m
2026-07-22 RYR3HB CAG → FKB Jul 22, 21:15 UTCJul 22, 22:30 UTC1h 15m
2026-07-22 RYR3RU CRL → OPO Jul 22, 19:05 UTCJul 22, 20:05 UTC1h 0m
2026-07-22 RYR8NH - Jul 22, 16:00 UTCJul 22, 18:15 UTC2h 15m
2026-07-22 RYR7MV - Jul 22, 13:00 UTCJul 22, 15:00 UTC2h 0m
2026-07-22 RYR5RC ZAG → NAP Jul 22, 04:05 UTCJul 22, 05:05 UTC1h 0m
2026-07-21 RYR92EQ - Jul 21, 21:10 UTCJul 21, 22:10 UTC1h 0m
2026-07-21 RYR3986 - Jul 21, 19:20 UTCJul 21, 20:10 UTC50m
2026-07-21 RYR8NH - Jul 21, 16:10 UTCJul 21, 18:35 UTC2h 25m
2026-07-21 RYR7MV - Jul 21, 13:15 UTCJul 21, 15:15 UTC2h 0m
2026-07-21 RYR633K CTA → BGY Jul 21, 11:20 UTCJul 21, 12:15 UTC55m
2026-07-21 RYR99NC - Jul 21, 09:30 UTCJul 21, 10:25 UTC55m
2026-07-21 RYR5QY OTP → BLQ Jul 21, 06:25 UTCJul 21, 08:25 UTC2h 0m
2026-07-21 RYR4RA MRS → TNG Jul 21, 03:55 UTCJul 21, 05:25 UTC1h 30m
2026-07-20 RYR6EW - Jul 20, 21:45 UTCJul 20, 23:20 UTC1h 35m
2026-07-20 RYR822J - Jul 20, 19:35 UTCJul 20, 21:00 UTC1h 25m
2026-07-20 RYR2RW MXP → STN Jul 20, 17:45 UTCJul 20, 18:35 UTC50m
2026-07-20 RYR19EW OLB → DUB Jul 20, 15:50 UTCJul 20, 16:40 UTC50m
2026-07-20 RYR961A JMK → BLQ Jul 20, 11:25 UTCJul 20, 13:30 UTC2h 5m
2026-07-20 RYR7EQ - Jul 20, 08:45 UTCJul 20, 10:30 UTC1h 45m
2026-07-20 RYR9LZ - Jul 20, 06:35 UTCJul 20, 07:50 UTC1h 15m
2026-07-20 RYR32FX BLQ → BDS Jul 20, 04:20 UTCJul 20, 05:15 UTC55m
2026-07-19 RYR5FV - Jul 19, 18:35 UTCJul 19, 21:55 UTC3h 20m
2026-07-19 RYR49KC - Jul 19, 13:10 UTCJul 19, 17:05 UTC3h 55m

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

Mode-S 4CAFC3 frequently asked

What is Mode-S code 4CAFC3?
4CAFC3 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-GXH.
Where is Mode-S 4CAFC3 registered?
Mode-S code 4CAFC3 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAFC3 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAFC3, octal 23127703, decimal 5,025,731.
What flights does 4CAFC3 operate?
Mode-S 4CAFC3 has broadcast 20 distinct callsigns, including RYR961A, RYR8593, RYR7EQ, RYR9SK, RYR8XK.