Apparatus

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sensors Mode-S transponder

4CAF29

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-ILO · BOEING 737 MAX 8

Hex
4CAF29
Octal
23127451
Decimal
5,025,577
Country
IE
Tail
EI-ILO
Type
B38M
No current signal · last broadcast 1h ago
Flights observed
561
Distinct callsigns
20
Country
IE
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 4CAF29.

Country allocation

The ICAO 24-bit address 4CAF29 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
RYR3J Ryanair 10 2026-04-28
RYR22MM Ryanair 10 2026-04-28
RYR45ZB Ryanair 8 2026-06-10
RYR1PY Ryanair 8 2026-06-10
RYR451P - 7 2026-06-29
RYR43ZZ - 7 2026-04-29
RYR70WE Ryanair 6 2026-04-29
RYR104A Ryanair 6 2026-04-28
RYR9983 Ryanair 5 2026-06-10
RYR394R - 5 2026-06-29
RYR18XM Ryanair 5 2026-06-10
RYR7HE Ryanair 4 2026-04-28
RYR2261 - 4 2026-06-29
RYR9HV Ryanair 3 2026-07-13
RYR8HG Ryanair 3 2026-05-31
RYR8479 - 3 2026-06-29
RYR7UB Ryanair 3 2026-06-08
RYR62WF Ryanair 3 2026-06-11
RYR4AY - 3 2026-06-22
RYR35BF Ryanair 3 2026-06-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 RYR16GE - Jul 15, 09:10 UTCJul 15, 10:15 UTC1h 5m
2026-07-15 RYR228K - Jul 15, 06:50 UTCJul 15, 08:25 UTC1h 35m
2026-07-14 RYR6GV - Jul 14, 20:40 UTCJul 14, 23:55 UTC3h 14m
2026-07-14 RYR18KR - Jul 14, 16:40 UTCJul 14, 19:35 UTC2h 55m
2026-07-14 RYR595F MLA → EDI Jul 14, 11:15 UTCJul 14, 14:55 UTC3h 40m
2026-07-14 RYR422B - Jul 14, 07:05 UTCJul 14, 10:25 UTC3h 20m
2026-07-13 RYR9LU - Jul 13, 20:15 UTCJul 13, 23:55 UTC3h 40m
2026-07-13 RYR9HV VNO → BVA Jul 13, 18:05 UTCJul 13, 18:40 UTC35m
2026-07-13 RYR9HV VNO → BVA Jul 13, 15:10 UTCJul 13, 17:35 UTC2h 25m
2026-07-13 RYR9HV VNO → BVA Jul 13, 14:30 UTCJul 13, 15:05 UTC35m
2026-07-13 RYR39ZU - Jul 13, 10:50 UTCJul 13, 13:30 UTC2h 40m
2026-07-13 RYR56PC - Jul 13, 07:01 UTCJul 13, 09:40 UTC2h 40m
2026-07-12 RYR7915 - Jul 12, 19:45 UTCJul 12, 22:30 UTC2h 45m
2026-07-12 RYR52WD - Jul 12, 15:45 UTCJul 12, 18:45 UTC3h 0m
2026-07-12 RYR39ZU - Jul 12, 11:40 UTCJul 12, 14:20 UTC2h 40m
2026-07-12 RYR56PC - Jul 12, 07:40 UTCJul 12, 10:30 UTC2h 50m
2026-07-11 RYR7JB - Jul 11, 22:25 UTCJul 12, 01:05 UTC2h 40m
2026-07-11 RYR74XJ - Jul 11, 18:40 UTCJul 11, 21:05 UTC2h 25m
2026-07-11 RYR77KA - Jul 11, 15:45 UTCJul 11, 17:50 UTC2h 5m
2026-07-11 RYR687J - Jul 11, 12:00 UTCJul 11, 13:55 UTC1h 55m
2026-07-11 RYR75ND - Jul 11, 07:50 UTCJul 11, 10:30 UTC2h 40m
2026-07-11 RYR4VW - Jul 11, 04:15 UTCJul 11, 06:45 UTC2h 30m
2026-07-10 RYR96XR SKG → NRN Jul 10, 18:00 UTCJul 10, 20:35 UTC2h 35m
2026-07-10 RYR2UC NRN → SKG Jul 10, 14:45 UTCJul 10, 16:55 UTC2h 10m
2026-07-10 RYR76HR - Jul 10, 11:30 UTCJul 10, 13:30 UTC2h 0m
2026-07-10 RYR3SA - Jul 10, 08:35 UTCJul 10, 10:25 UTC1h 50m
2026-07-10 RYR9466 - Jul 10, 06:25 UTCJul 10, 07:55 UTC1h 30m
2026-07-10 RYR9465 - Jul 10, 04:15 UTCJul 10, 05:35 UTC1h 20m
2026-07-09 RYR299Q - Jul 9, 18:05 UTCJul 9, 20:25 UTC2h 20m
2026-07-09 RYR6Q ACE → MAN Jul 9, 14:50 UTCJul 9, 17:10 UTC2h 20m
2026-07-09 RYR9466 - Jul 9, 12:30 UTCJul 9, 14:05 UTC1h 35m
2026-07-09 RYR9465 - Jul 9, 10:20 UTCJul 9, 11:35 UTC1h 15m
2026-07-09 RYR31NL - Jul 9, 07:20 UTCJul 9, 09:20 UTC2h 0m
2026-07-09 RYR41DZ - Jul 9, 04:05 UTCJul 9, 06:15 UTC2h 10m
2026-07-08 RYR306H - Jul 8, 19:45 UTCJul 8, 21:00 UTC1h 15m
2026-07-08 RYR363E NRN → BGY Jul 8, 17:35 UTCJul 8, 18:45 UTC1h 10m
2026-07-08 RYR76HR - Jul 8, 14:40 UTCJul 8, 16:50 UTC2h 10m
2026-07-08 RYR3SA - Jul 8, 11:35 UTCJul 8, 13:20 UTC1h 45m
2026-07-08 RYR39QA FAO → NRN Jul 8, 07:50 UTCJul 8, 10:30 UTC2h 40m
2026-07-07 RYR7132 - Jul 7, 19:55 UTCJul 7, 22:20 UTC2h 25m
2026-07-07 RYR5TG FAO → DUB Jul 7, 16:30 UTCJul 7, 18:55 UTC2h 25m
2026-07-07 RYR8DJ KRK → FAO Jul 7, 10:45 UTCJul 7, 14:15 UTC3h 30m
2026-07-07 RYR71WN FAO → KRK Jul 7, 06:15 UTCJul 7, 09:50 UTC3h 35m
2026-07-06 RYR1472 MAD → FAO Jul 6, 21:30 UTCJul 6, 22:30 UTC1h 0m
2026-07-06 RYR3WR - Jul 6, 19:10 UTCJul 6, 20:10 UTC1h 0m
2026-07-06 RYR1DM - Jul 6, 16:00 UTCJul 6, 18:20 UTC2h 20m
2026-07-06 RYR5WG FAO → STN Jul 6, 12:10 UTCJul 6, 14:40 UTC2h 30m
2026-07-06 RYR54LC ORK → FAO Jul 6, 08:55 UTCJul 6, 11:10 UTC2h 15m
2026-07-06 RYR8DY FAO → ORK Jul 6, 05:50 UTCJul 6, 08:05 UTC2h 15m
2026-07-05 RYR8DJ KRK → FAO Jul 5, 18:10 UTCJul 5, 21:35 UTC3h 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-ILO page for operator, model, and routing details .

Mode-S 4CAF29 frequently asked

What is Mode-S code 4CAF29?
4CAF29 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-ILO.
Where is Mode-S 4CAF29 registered?
Mode-S code 4CAF29 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAF29 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAF29, octal 23127451, decimal 5,025,577.
What flights does 4CAF29 operate?
Mode-S 4CAF29 has broadcast 20 distinct callsigns, including RYR3J, RYR22MM, RYR45ZB, RYR1PY, RYR451P.