Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

4CADFD

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-IHR · BOEING 737 MAX 8

Hex
4CADFD
Octal
23126775
Decimal
5,025,277
Country
IE
Tail
EI-IHR
Type
B38M
No current signal · last broadcast Jul 26, 21:15 UTC
Flights observed
636
Distinct callsigns
20
Country
IE
Last broadcast
Jul 26, 21:15 UTC

Last known position

Most recent position reported by Mode-S 4CADFD.

Country allocation

The ICAO 24-bit address 4CADFD 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
RYR7JU Ryanair 5 2026-07-25
RYR58UE Ryanair 5 2026-07-25
RYR42MV Ryanair 5 2026-07-11
RYR9TX - 4 2026-07-11
RYR3LC - 4 2026-07-08
RYR9BJ Ryanair 3 2026-07-25
RYR99SD Ryanair 3 2026-05-07
RYR99RH Ryanair 3 2026-05-11
RYR98RQ - 3 2026-07-01
RYR95HN Ryanair 3 2026-06-02
RYR9523 Ryanair 3 2026-06-21
RYR88FE Ryanair 3 2026-05-11
RYR7ZV - 3 2026-04-16
RYR7EE Ryanair 3 2026-05-13
RYR70VK Ryanair 3 2026-05-08
RYR6ZE Ryanair 3 2026-07-25
RYR6UR - 3 2026-07-24
RYR6H - 3 2026-07-22
RYR68NX - 3 2026-07-01
RYR67JA - 3 2026-06-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RYR43MW RIX → EDI Jul 26, 20:30 UTCJul 26, 21:15 UTC45m
2026-07-26 RYR7UN STN → LDE Jul 26, 17:20 UTCJul 26, 19:25 UTC2h 5m
2026-07-26 RYR362U CRL → EDI Jul 26, 14:30 UTCJul 26, 16:00 UTC1h 30m
2026-07-26 RYR7352 EDI → CRL Jul 26, 12:25 UTCJul 26, 13:35 UTC1h 10m
2026-07-26 RYR67BD KUN → AGP Jul 26, 08:20 UTCJul 26, 11:15 UTC2h 55m
2026-07-26 RYR30GY EDI → BUD Jul 26, 04:55 UTCJul 26, 07:10 UTC2h 16m
2026-07-25 RYR2675 CPH → EDI Jul 25, 23:30 UTCJul 26, 01:10 UTC1h 40m
2026-07-25 RYR58UE STN → CPH Jul 25, 21:10 UTCJul 25, 22:25 UTC1h 15m
2026-07-25 RYR7JU CPH → STN Jul 25, 18:45 UTCJul 25, 20:10 UTC1h 25m
2026-07-25 RYR63FF VCE → CPH Jul 25, 16:10 UTCJul 25, 17:55 UTC1h 45m
2026-07-25 RYR15FP CPH → VCE Jul 25, 13:20 UTCJul 25, 15:00 UTC1h 40m
2026-07-25 RYR6ZE BLQ → CPH Jul 25, 10:25 UTCJul 25, 12:05 UTC1h 40m
2026-07-25 RYR9BJ CPH → BLQ Jul 25, 07:30 UTCJul 25, 09:10 UTC1h 40m
2026-07-25 RYR79RU GDN → CPH Jul 25, 06:10 UTCJul 25, 06:25 UTC15m
2026-07-25 RYR4D BVA → EDI Jul 25, 04:20 UTCJul 25, 05:00 UTC40m
2026-07-24 RYR4BN KIR → HHN Jul 24, 21:20 UTCJul 24, 23:05 UTC1h 45m
2026-07-24 RYR23VX CPH → BGY Jul 24, 18:35 UTCJul 24, 20:10 UTC1h 35m
2026-07-24 RYR605 BUD → CPH Jul 24, 16:15 UTCJul 24, 17:50 UTC1h 35m
2026-07-24 RYR22ZE CPH → BUD Jul 24, 13:50 UTCJul 24, 15:10 UTC1h 20m
2026-07-24 RYR6UR PRG → CPH Jul 24, 11:50 UTCJul 24, 12:55 UTC1h 5m
2026-07-24 RYR4TC CPH → PRG Jul 24, 10:05 UTCJul 24, 11:00 UTC55m
2026-07-24 RYR6KC STN → NAP Jul 24, 07:30 UTCJul 24, 09:10 UTC1h 40m
2026-07-24 RYR2UT BRS → POZ Jul 24, 04:05 UTCJul 24, 06:05 UTC2h 0m
2026-07-23 RYR99WT STN → CPH Jul 23, 22:05 UTCJul 23, 23:20 UTC1h 15m
2026-07-23 RYR57MU CPH → STN Jul 23, 19:30 UTCJul 23, 21:00 UTC1h 30m
2026-07-23 RYR51KK STN → CPH Jul 23, 17:20 UTCJul 23, 18:40 UTC1h 20m
2026-07-23 RYR7NT RIX → CGN Jul 23, 14:50 UTCJul 23, 16:10 UTC1h 20m
2026-07-23 RYR6ZW ZAD → CPH Jul 23, 12:05 UTCJul 23, 13:50 UTC1h 45m
2026-07-23 RYR3026 - Jul 23, 09:25 UTCJul 23, 10:55 UTC1h 30m
2026-07-23 RYR9266 BVA → CPH Jul 23, 06:55 UTCJul 23, 08:35 UTC1h 40m
2026-07-23 RYR9267 CPH → BVA Jul 23, 04:20 UTCJul 23, 05:35 UTC1h 15m
2026-07-22 RYR30MV - Jul 22, 21:45 UTCJul 22, 23:00 UTC1h 15m
2026-07-22 RYR6H CPH → KRK Jul 22, 19:45 UTCJul 22, 20:55 UTC1h 10m
2026-07-22 RYR63FF VCE → CPH Jul 22, 17:10 UTCJul 22, 18:50 UTC1h 40m
2026-07-22 RYR15FP CPH → VCE Jul 22, 14:10 UTCJul 22, 15:50 UTC1h 40m
2026-07-22 RYR66ZD SCQ → BGY Jul 22, 12:10 UTCJul 22, 13:10 UTC1h 0m
2026-07-22 RYR9749 - Jul 22, 11:20 UTCJul 22, 11:30 UTC10m
2026-07-22 RYR736P CPH → TRN Jul 22, 04:40 UTCJul 22, 05:25 UTC45m
2026-07-21 RYR30MV - Jul 21, 21:30 UTCJul 21, 22:40 UTC1h 10m
2026-07-21 RYR6H CPH → KRK Jul 21, 19:30 UTCJul 21, 20:40 UTC1h 10m
2026-07-21 RYR6ZE - Jul 21, 16:40 UTCJul 21, 18:45 UTC2h 5m
2026-07-21 RYR9BJ CPH → BLQ Jul 21, 14:05 UTCJul 21, 15:50 UTC1h 45m
2026-07-21 RYR4UL NRN → AOI Jul 21, 11:30 UTCJul 21, 13:10 UTC1h 40m
2026-07-21 RYR28CC - Jul 21, 08:50 UTCJul 21, 10:25 UTC1h 35m
2026-07-21 RYR58UE STN → CPH Jul 21, 06:35 UTCJul 21, 07:55 UTC1h 20m
2026-07-21 RYR7JU CPH → STN Jul 21, 04:00 UTCJul 21, 05:25 UTC1h 25m
2026-07-20 RYR87SQ PMO → PMF Jul 20, 20:45 UTCJul 20, 23:35 UTC2h 50m
2026-07-20 RYR220U CPH → OPO Jul 20, 16:50 UTCJul 20, 19:40 UTC2h 50m
2026-07-20 RYR81WZ PSA → CPH Jul 20, 13:50 UTCJul 20, 15:45 UTC1h 55m
2026-07-20 RYR84AM BUD → PSA Jul 20, 11:10 UTCJul 20, 12:25 UTC1h 15m

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

Mode-S 4CADFD frequently asked

What is Mode-S code 4CADFD?
4CADFD is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-IHR.
Where is Mode-S 4CADFD registered?
Mode-S code 4CADFD is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CADFD broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CADFD, octal 23126775, decimal 5,025,277.
What flights does 4CADFD operate?
Mode-S 4CADFD has broadcast 20 distinct callsigns, including RYR7JU, RYR58UE, RYR42MV, RYR9TX, RYR3LC.