Apparatus

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sensors Mode-S transponder

4CADB9

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-IFY · BOEING 737 MAX 8

Hex
4CADB9
Octal
23126671
Decimal
5,025,209
Country
IE
Tail
EI-IFY
Type
B38M
Broadcasting now · callsign RYR2UC · 37,000 ft
Flights observed
310
Distinct callsigns
20
Country
IE
Last broadcast
11h ago

Current position

4CADB9 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4CADB9 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
RYR526B Ryanair 6 2026-04-18
RYR4JM Ryanair 5 2026-04-18
RYR93XA Ryanair 4 2026-04-15
RYR49EY Ryanair 4 2026-04-15
RYR9JX Ryanair 3 2026-05-15
RYR982M Ryanair 3 2026-05-15
RYR94JD Ryanair 3 2026-05-25
RYR55PD Ryanair 3 2026-05-25
RYR310N Ryanair 3 2026-04-20
RYR9YP - 2 2026-04-17
RYR9CH Ryanair 2 2026-04-30
RYR97XF Ryanair 2 2026-05-24
RYR926K - 2 2026-04-16
RYR91DJ Ryanair 2 2026-04-17
RYR8SL Ryanair 2 2026-05-11
RYR8AB Ryanair 2 2026-05-19
RYR835Y Ryanair 2 2026-04-17
RYR7UX Ryanair 2 2026-05-16
RYR7SR Ryanair 2 2026-04-23
RYR76MJ Ryanair 2 2026-04-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 RYR755H PMI → NRN May 29, 15:30 UTCMay 29, 17:35 UTC2h 5m
2026-05-29 RYR5SR EDI → IBZ May 29, 11:35 UTCMay 29, 13:30 UTC1h 55m
2026-05-29 RYR51TU GOA → STN May 29, 08:30 UTCMay 29, 10:15 UTC1h 45m
2026-05-29 RYR284X STN → GOA May 29, 05:45 UTCMay 29, 07:25 UTC1h 40m
2026-05-28 RYR85UA AGP → STN May 28, 20:25 UTCMay 28, 22:50 UTC2h 25m
2026-05-28 RYR36NY STN → AGP May 28, 17:00 UTCMay 28, 19:25 UTC2h 25m
2026-05-28 RYR67XW PLQ → STN May 28, 13:50 UTCMay 28, 15:50 UTC2h 0m
2026-05-28 RYR95DF STN → PLQ May 28, 10:35 UTCMay 28, 12:35 UTC2h 0m
2026-05-28 RYR1PX STN → PMI May 28, 08:25 UTCMay 28, 09:40 UTC1h 15m
2026-05-28 RYR67UB STN → FMM May 28, 06:05 UTCMay 28, 07:20 UTC1h 15m
2026-05-27 RYR70GE PMO → STN May 27, 19:15 UTCMay 27, 21:50 UTC2h 35m
2026-05-27 RYR3ZE GDN → PRG May 27, 15:50 UTCMay 27, 18:00 UTC2h 10m
2026-05-27 RYR818V STN → SVQ May 27, 13:35 UTCMay 27, 14:45 UTC1h 10m
2026-05-27 RYR67DL STN → ORK May 27, 11:50 UTCMay 27, 12:45 UTC55m
2026-05-27 RYR6BN PMI → CGN May 27, 08:45 UTCMay 27, 10:50 UTC2h 5m
2026-05-27 RYR50AM STN → VLC May 27, 05:40 UTCMay 27, 07:45 UTC2h 5m
2026-05-26 RYR587A DUB → TFS May 26, 21:00 UTCMay 26, 23:39 UTC2h 40m
2026-05-26 RYR9DT MXP → DUB May 26, 17:25 UTCMay 26, 20:00 UTC2h 35m
2026-05-25 RYR2KN BGY → DUB May 25, 21:54 UTCMay 26, 00:00 UTC2h 5m
2026-05-25 RYR74PQ - May 25, 18:05 UTCMay 25, 20:34 UTC2h 29m
2026-05-25 RYR551A GRO → LBA May 25, 14:20 UTCMay 25, 16:15 UTC1h 55m
2026-05-25 RYR57CE LBA → GRO May 25, 11:15 UTCMay 25, 13:15 UTC2h 0m
2026-05-25 RYR55PD DUB → LBA May 25, 09:50 UTCMay 25, 10:25 UTC35m
2026-05-25 RYR94JD IBZ → AGP May 25, 08:15 UTCMay 25, 08:55 UTC40m
2026-05-24 RYR5BH BGY → TPS May 24, 23:30 UTCMay 24, 23:46 UTC16m
2026-05-24 RYR97XF LBA → PMI May 24, 19:55 UTCMay 24, 21:50 UTC1h 55m
2026-05-24 RYR5421 OTP → LBA May 24, 12:55 UTCMay 24, 15:55 UTC3h 0m
2026-05-24 RYR76DD EDI → BUD May 24, 09:10 UTCMay 24, 12:05 UTC2h 55m
2026-05-24 RYR15DY DUB → LBA May 24, 07:45 UTCMay 24, 08:20 UTC35m
2026-05-24 RYR10EC LBA → DUB May 24, 06:00 UTCMay 24, 06:35 UTC35m
2026-05-23 RYR8KQ ORK → STN May 23, 20:45 UTCMay 23, 22:35 UTC1h 50m
2026-05-23 RYR68WJ LBA → WRO May 23, 17:55 UTCMay 23, 19:40 UTC1h 46m
2026-05-23 RYR282D BRS → FAO May 23, 15:15 UTCMay 23, 17:05 UTC1h 50m
2026-05-23 RYR37CU LBA → POZ May 23, 12:45 UTCMay 23, 14:25 UTC1h 40m
2026-05-23 RYR55PD DUB → LBA May 23, 11:10 UTCMay 23, 11:45 UTC35m
2026-05-23 RYR94JD IBZ → AGP May 23, 09:30 UTCMay 23, 10:10 UTC40m
2026-05-23 RYR15DY DUB → LBA May 23, 07:50 UTCMay 23, 08:20 UTC30m
2026-05-23 RYR10EC LBA → DUB May 23, 06:20 UTCMay 23, 07:05 UTC45m
2026-05-22 RYR93TP FAO → LBA May 22, 21:20 UTCMay 22, 23:50 UTC2h 30m
2026-05-22 RYR82FQ LBA → FAO May 22, 17:40 UTCMay 22, 20:30 UTC2h 50m
2026-05-22 RYR76ZJ - May 22, 14:20 UTCMay 22, 16:30 UTC2h 10m
2026-05-22 RYR3BU MRS → DUB May 22, 11:20 UTCMay 22, 13:15 UTC1h 56m
2026-05-22 RYR282D BRS → FAO May 22, 08:35 UTCMay 22, 10:30 UTC1h 55m
2026-05-22 RYR37CU LBA → POZ May 22, 06:10 UTCMay 22, 07:50 UTC1h 40m
2026-05-21 RYR5BH BGY → TPS May 21, 21:30 UTCMay 21, 23:40 UTC2h 10m
2026-05-21 RYR97XF LBA → PMI May 21, 18:10 UTCMay 21, 20:25 UTC2h 15m
2026-05-21 RYR55PD DUB → LBA May 21, 16:05 UTCMay 21, 16:40 UTC35m
2026-05-21 RYR94JD IBZ → AGP May 21, 14:20 UTCMay 21, 15:00 UTC40m
2026-05-21 RYR28UT IBZ → LBA May 21, 11:05 UTCMay 21, 13:30 UTC2h 25m
2026-05-21 RYR27QJ LBA → IBZ May 21, 07:45 UTCMay 21, 10:05 UTC2h 20m

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

Mode-S 4CADB9 frequently asked

What is Mode-S code 4CADB9?
4CADB9 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-IFY.
Where is Mode-S 4CADB9 registered?
Mode-S code 4CADB9 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CADB9 broadcasting right now?
Yes. Mode-S 4CADB9 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CADB9, octal 23126671, decimal 5,025,209.
What flights does 4CADB9 operate?
Mode-S 4CADB9 has broadcast 20 distinct callsigns, including RYR526B, RYR4JM, RYR93XA, RYR49EY, RYR9JX.