Apparatus

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sensors Mode-S transponder

4CA4F4

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-DPP · BOEING 737-800

Hex
4CA4F4
Octal
23122364
Decimal
5,022,964
Country
IE
Tail
EI-DPP
Type
B738
Transponder active on ground
Flights observed
325
Distinct callsigns
20
Country
IE
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 4CA4F4.

Country allocation

The ICAO 24-bit address 4CA4F4 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
RYR818V Ryanair 3 2026-05-01
RYR76UD Ryanair 3 2026-04-22
RYR63FB Ryanair 3 2026-05-28
RYR59JH Ryanair 3 2026-04-29
RYR49WZ - 3 2026-04-14
RYR3XM Ryanair 3 2026-05-28
RYR2ZX Ryanair 3 2026-04-22
RYR2RW Ryanair 3 2026-05-23
RYR96QQ Ryanair 2 2026-05-26
RYR93XA Ryanair 2 2026-04-25
RYR8UF Ryanair 2 2026-04-19
RYR89EQ Ryanair 2 2026-05-24
RYR85KD Ryanair 2 2026-05-04
RYR7FX Ryanair 2 2026-05-16
RYR78EZ Ryanair 2 2026-05-27
RYR74PT Ryanair 2 2026-05-14
RYR73XD Ryanair 2 2026-05-11
RYR71KE Ryanair 2 2026-04-16
RYR709E Ryanair 2 2026-05-26
RYR6LF Ryanair 2 2026-05-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 RYR4YT VIE → MXP May 30, 18:50 UTCMay 30, 19:00 UTC10m
2026-05-30 RYR56HH CAG → VRN May 30, 17:10 UTCMay 30, 18:10 UTC1h 0m
2026-05-30 RYR46PU TFS → LTN May 30, 14:00 UTCMay 30, 15:50 UTC1h 50m
2026-05-30 RYR9858 MXP → PDV May 30, 11:15 UTCMay 30, 12:55 UTC1h 40m
2026-05-30 RYR4SP BGY → SVQ May 30, 08:00 UTCMay 30, 09:30 UTC1h 30m
2026-05-30 RYR743Z MXP → STN May 30, 05:15 UTCMay 30, 06:45 UTC1h 30m
2026-05-29 RYR2TY MAN → DUB May 29, 21:30 UTCMay 29, 22:20 UTC50m
2026-05-29 RYR2WX NCL → DUB May 29, 19:50 UTCMay 29, 20:45 UTC55m
2026-05-29 RYR70ED AHO → MXP May 29, 17:55 UTCMay 29, 18:50 UTC55m
2026-05-29 RYR66GL CTA → MXP May 29, 16:05 UTCMay 29, 17:05 UTC1h 0m
2026-05-29 RYR8VD STN → KUN May 29, 13:30 UTCMay 29, 14:55 UTC1h 25m
2026-05-29 RYR529 VXO → STN May 29, 10:50 UTCMay 29, 12:15 UTC1h 25m
2026-05-29 RYR44GP MAN → MXP May 29, 08:10 UTCMay 29, 10:00 UTC1h 50m
2026-05-29 RYR60SF MXP → MAN May 29, 05:10 UTCMay 29, 06:55 UTC1h 45m
2026-05-29 RYR7MP NCL → LPA May 29, 00:15 UTCMay 29, 01:25 UTC1h 10m
2026-05-28 RYR2770 MXP → BRI May 28, 22:30 UTCMay 28, 23:25 UTC55m
2026-05-28 RYR3HB CAG → FKB May 28, 20:00 UTCMay 28, 21:20 UTC1h 20m
2026-05-28 RYR3RU CRL → OPO May 28, 17:45 UTCMay 28, 19:00 UTC1h 15m
2026-05-28 RYR1VY AGP → STN May 28, 16:00 UTCMay 28, 17:00 UTC1h 0m
2026-05-28 RYR4353 - May 28, 14:00 UTCMay 28, 15:05 UTC1h 5m
2026-05-28 RYR63FB BCN → BLQ May 28, 11:15 UTCMay 28, 12:30 UTC1h 15m
2026-05-28 RYR3XM EMA → AGP May 28, 08:05 UTCMay 28, 09:20 UTC1h 15m
2026-05-28 RYR2Z RAK → BGY May 28, 06:05 UTCMay 28, 07:05 UTC1h 0m
2026-05-28 RYR5RC ZAG → NAP May 28, 04:05 UTCMay 28, 05:10 UTC1h 5m
2026-05-27 RYR6128 AHO → BLQ May 27, 21:45 UTCMay 27, 22:35 UTC50m
2026-05-27 RYR78EZ BLQ → AHO May 27, 20:10 UTCMay 27, 21:00 UTC50m
2026-05-27 RYR420Z LIS → BLQ May 27, 17:00 UTCMay 27, 19:30 UTC2h 30m
2026-05-27 RYR67UV TRN → BDS May 27, 13:25 UTCMay 27, 15:50 UTC2h 25m
2026-05-27 RYR11CP BER → BLQ May 27, 10:35 UTCMay 27, 11:55 UTC1h 20m
2026-05-27 RYR91ZT BLQ → BER May 27, 08:35 UTCMay 27, 09:55 UTC1h 20m
2026-05-27 RYR9LZ LBA → FUE May 27, 06:15 UTCMay 27, 07:15 UTC1h 1m
2026-05-27 RYR32FX BLQ → BDS May 27, 04:19 UTCMay 27, 05:24 UTC1h 5m
2026-05-26 RYR709E RAK → BCN May 26, 19:40 UTCMay 26, 21:14 UTC1h 35m
2026-05-26 RYR48NP BLQ → STN May 26, 16:59 UTCMay 26, 18:45 UTC1h 45m
2026-05-26 RYR4419 BDS → BLQ May 26, 14:35 UTCMay 26, 15:45 UTC1h 10m
2026-05-26 RYR4418 BLQ → BDS May 26, 12:40 UTCMay 26, 13:50 UTC1h 10m
2026-05-26 RYR38EN HER → BLQ May 26, 09:55 UTCMay 26, 11:54 UTC2h 0m
2026-05-26 RYR96QQ BLQ → HER May 26, 06:10 UTCMay 26, 08:19 UTC2h 10m
2026-05-25 RYR1GY ALC → BRS May 25, 21:24 UTCMay 25, 23:00 UTC1h 35m
2026-05-25 RYR22 DUB → BVA May 25, 18:10 UTCMay 25, 19:35 UTC1h 24m
2026-05-25 RYR8QZ STN → DUB May 25, 15:45 UTCMay 25, 17:20 UTC1h 35m
2026-05-25 RYR520K ZAG → CRL May 25, 13:20 UTCMay 25, 14:50 UTC1h 30m
2026-05-25 RYR7FL ACE → NOC May 25, 08:55 UTCMay 25, 11:25 UTC2h 30m
2026-05-25 RYR38HP BLQ → FEZ May 25, 04:20 UTCMay 25, 06:35 UTC2h 15m
2026-05-24 RYR9BJ CPH → BLQ May 24, 19:45 UTCMay 24, 21:25 UTC1h 40m
2026-05-24 RYR6ZE BLQ → CPH May 24, 16:50 UTCMay 24, 18:35 UTC1h 45m
2026-05-24 RYR6GH AGP → BOH May 24, 14:30 UTCMay 24, 15:40 UTC1h 10m
2026-05-24 RYR87AY HAM → BGY May 24, 12:35 UTCMay 24, 13:40 UTC1h 5m
2026-05-24 RYR5MH BRI → BLQ May 24, 10:15 UTCMay 24, 11:10 UTC55m
2026-05-24 RYR28SK BLQ → BRI May 24, 08:30 UTCMay 24, 09:30 UTC1h 0m

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

Mode-S 4CA4F4 frequently asked

What is Mode-S code 4CA4F4?
4CA4F4 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-DPP.
Where is Mode-S 4CA4F4 registered?
Mode-S code 4CA4F4 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CA4F4 broadcasting right now?
Mode-S 4CA4F4 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CA4F4, octal 23122364, decimal 5,022,964.
What flights does 4CA4F4 operate?
Mode-S 4CA4F4 has broadcast 20 distinct callsigns, including RYR818V, RYR76UD, RYR63FB, RYR59JH, RYR49WZ.