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sensors Mode-S transponder

4CADF4

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-IHI · BOEING 737 MAX 8

Hex
4CADF4
Octal
23126764
Decimal
5,025,268
Country
IE
Tail
EI-IHI
Type
B38M
No current signal · last broadcast Jul 26, 22:25 UTC
Flights observed
576
Distinct callsigns
20
Country
IE
Last broadcast
Jul 26, 22:25 UTC

Last known position

Most recent position reported by Mode-S 4CADF4.

Country allocation

The ICAO 24-bit address 4CADF4 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
RYR97XF - 5 2026-07-05
RYR7UL Ryanair 5 2026-04-29
RYR780Y - 5 2026-05-01
RYR76DD - 5 2026-07-08
RYR5PH Ryanair 5 2026-04-26
RYR5BH - 5 2026-07-05
RYR5421 - 5 2026-07-08
RYR41BH Ryanair 5 2026-05-01
RYR2WW Ryanair 5 2026-04-25
RYR95QF Ryanair 4 2026-05-03
RYR8CR Ryanair 4 2026-05-24
RYR80NW Ryanair 4 2026-05-29
RYR77RN Ryanair 4 2026-05-24
RYR6571 Ryanair 4 2026-04-26
RYR63XL Ryanair 4 2026-05-01
RYR62AD Ryanair 4 2026-04-30
RYR624V Ryanair 4 2026-04-26
RYR61KY Ryanair 4 2026-05-28
RYR55PD - 4 2026-07-06
RYR44SB Ryanair 4 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RYR8HR CRL → PMO Jul 26, 20:20 UTCJul 26, 22:25 UTC2h 5m
2026-07-26 RYR87AQ - Jul 26, 16:50 UTCJul 26, 19:25 UTC2h 35m
2026-07-26 RYR2TN BVA → MAD Jul 26, 13:35 UTCJul 26, 14:25 UTC50m
2026-07-26 RYR90CX ALC → TTU Jul 26, 12:00 UTCJul 26, 12:55 UTC55m
2026-07-26 RYR8VH PMO → VCE Jul 26, 08:05 UTCJul 26, 09:55 UTC1h 50m
2026-07-26 RYR84CJ ALC → CRL Jul 26, 04:55 UTCJul 26, 07:00 UTC2h 6m
2026-07-25 RYR86HL LGW → ALC Jul 25, 17:55 UTCJul 25, 19:55 UTC2h 0m
2026-07-25 RYR47HE ALC → LGW Jul 25, 16:40 UTCJul 25, 16:50 UTC10m
2026-07-25 RYR47HE ALC → LGW Jul 25, 14:30 UTCJul 25, 16:35 UTC2h 5m
2026-07-25 RYR13QY CPH → ALC Jul 25, 10:15 UTCJul 25, 13:20 UTC3h 5m
2026-07-25 RYR94VF ALC → CPH Jul 25, 06:30 UTCJul 25, 09:25 UTC2h 55m
2026-07-24 RYR17KC GOT → ALC Jul 24, 19:35 UTCJul 24, 22:55 UTC3h 20m
2026-07-24 RYR8TE MRS → DUB Jul 24, 15:30 UTCJul 24, 18:40 UTC3h 10m
2026-07-24 RYR3SF TFS → MXP Jul 24, 13:35 UTCJul 24, 14:15 UTC40m
2026-07-24 RYR3EJ - Jul 24, 11:55 UTCJul 24, 12:30 UTC35m
2026-07-24 RYR95GB SNN → ALC Jul 24, 08:00 UTCJul 24, 10:30 UTC2h 30m
2026-07-24 RYR5MX ARN → SKG Jul 24, 04:40 UTCJul 24, 06:55 UTC2h 15m
2026-07-23 RYR81YP HEL → ALC Jul 23, 18:55 UTCJul 23, 22:30 UTC3h 35m
2026-07-23 RYR48UK ALC → HEL Jul 23, 13:50 UTCJul 23, 17:55 UTC4h 5m
2026-07-23 RYR8JY VIE → BRI Jul 23, 09:50 UTCJul 23, 12:50 UTC3h 0m
2026-07-23 RYR2QH PRG → ZAD Jul 23, 06:05 UTCJul 23, 09:00 UTC2h 55m
2026-07-22 RYR86HL LGW → ALC Jul 22, 19:40 UTCJul 22, 21:40 UTC2h 0m
2026-07-22 RYR47HE - Jul 22, 16:25 UTCJul 22, 18:40 UTC2h 15m
2026-07-22 RYR98PJ MRS → ALC Jul 22, 13:40 UTCJul 22, 14:55 UTC1h 15m
2026-07-22 RYR804X ALC → MRS Jul 22, 11:40 UTCJul 22, 12:40 UTC1h 0m
2026-07-21 RYR6PP - Jul 21, 18:40 UTCJul 21, 21:05 UTC2h 25m
2026-07-21 RYR54GN - Jul 21, 15:35 UTCJul 21, 17:55 UTC2h 20m
2026-07-21 RYR1PY WAW → ALC Jul 21, 10:15 UTCJul 21, 13:35 UTC3h 20m
2026-07-21 RYR45ZB ALC → WAW Jul 21, 05:50 UTCJul 21, 08:40 UTC2h 50m
2026-07-20 RYR249 - Jul 20, 19:50 UTCJul 20, 22:25 UTC2h 35m
2026-07-20 RYR85MM ARN → BCN Jul 20, 16:50 UTCJul 20, 19:10 UTC2h 20m
2026-07-20 RYR8KW - Jul 20, 14:20 UTCJul 20, 15:40 UTC1h 20m
2026-07-20 RYR190J - Jul 20, 09:20 UTCJul 20, 11:55 UTC2h 35m
2026-07-20 RYR4BL RAK → CIA Jul 20, 05:20 UTCJul 20, 07:35 UTC2h 15m
2026-07-19 RYR28UJ - Jul 19, 22:20 UTCJul 19, 22:45 UTC25m
2026-07-19 RUK46VM STN → RAK Jul 19, 18:10 UTCJul 19, 21:05 UTC2h 55m
2026-07-19 RYR11PM BCN → STN Jul 19, 15:15 UTCJul 19, 17:05 UTC1h 50m
2026-07-19 RYR33DQ - Jul 19, 12:10 UTCJul 19, 14:00 UTC1h 50m
2026-07-19 RYR19JN - Jul 19, 09:25 UTCJul 19, 11:00 UTC1h 35m
2026-07-19 RYR30ZG STN → LDE Jul 19, 07:05 UTCJul 19, 08:35 UTC1h 30m
2026-07-18 RYR67XW - Jul 18, 19:50 UTCJul 18, 21:45 UTC1h 55m
2026-07-18 RYR95DF - Jul 18, 17:05 UTCJul 18, 18:40 UTC1h 35m
2026-07-18 RYR2RC - Jul 18, 11:50 UTCJul 18, 15:15 UTC3h 25m
2026-07-18 RYR13TR STN → FUE Jul 18, 06:55 UTCJul 18, 10:30 UTC3h 35m
2026-07-17 RYR64FN MLA → STN Jul 17, 16:00 UTCJul 17, 19:00 UTC3h 0m
2026-07-17 RYR7XB VLC → MLA Jul 17, 13:05 UTCJul 17, 14:50 UTC1h 45m
2026-07-17 RYR18TH MLA → VLC Jul 17, 09:55 UTCJul 17, 11:55 UTC2h 0m
2026-07-17 RYR4CJ - Jul 17, 06:25 UTCJul 17, 07:44 UTC1h 20m
2026-07-17 RYR159L MLA → PSA Jul 17, 04:10 UTCJul 17, 05:30 UTC1h 20m
2026-07-16 RYR45NP TRN → MLA Jul 16, 22:49 UTCJul 17, 00:25 UTC1h 35m

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

Mode-S 4CADF4 frequently asked

What is Mode-S code 4CADF4?
4CADF4 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-IHI.
Where is Mode-S 4CADF4 registered?
Mode-S code 4CADF4 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CADF4 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CADF4, octal 23126764, decimal 5,025,268.
What flights does 4CADF4 operate?
Mode-S 4CADF4 has broadcast 20 distinct callsigns, including RYR97XF, RYR7UL, RYR780Y, RYR76DD, RYR5PH.