Apparatus

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sensors Mode-S transponder

4CA242

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-DCL · BOEING 737-800

Hex
4CA242
Octal
23121102
Decimal
5,022,274
Country
IE
Tail
EI-DCL
Type
B738
Broadcasting now · callsign RYR7DU · 16,900 ft
Flights observed
662
Distinct callsigns
20
Country
IE
Last broadcast
Jul 26, 21:00 UTC

Current position

4CA242 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4CA242 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
RYR9WD Ryanair 7 2026-05-22
RYR1WZ Ryanair 6 2026-05-22
RYR83XQ Ryanair 5 2026-05-20
RYR738U - 5 2026-07-15
RYR6FR - 5 2026-07-15
RYR28PF Ryanair 5 2026-05-20
RYR27HU Ryanair 5 2026-05-20
RYR83CW Ryanair 4 2026-04-22
RYR5PE Ryanair 4 2026-04-22
RYR5076 Ryanair 4 2026-05-23
RYR38JR Ryanair 4 2026-05-23
RYR28XE Ryanair 4 2026-05-20
RYR100T - 4 2026-06-15
RYR9JQ - 3 2026-07-12
RYR98YP Ryanair 3 2026-04-24
RYR95LU Ryanair 3 2026-05-22
RYR74SB - 3 2026-04-13
RYR732U Ryanair 3 2026-05-22
RYR67 Ryanair 3 2026-06-04
RYR65CV Ryanair 3 2026-04-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RYR9538 BBU → FMM Jul 26, 19:10 UTCJul 26, 21:00 UTC1h 50m
2026-07-26 RYR3LN PSA → BRI Jul 26, 16:45 UTCJul 26, 18:20 UTC1h 35m
2026-07-26 RYR9535 MLA → FMM Jul 26, 14:00 UTCJul 26, 15:55 UTC1h 55m
2026-07-26 RYR9534 FMM → MLA Jul 26, 10:50 UTCJul 26, 12:45 UTC1h 55m
2026-07-26 RYR5LP DUB → PRG Jul 26, 07:20 UTCJul 26, 09:15 UTC1h 55m
2026-07-26 RYR9MT KUN → ARN Jul 26, 04:15 UTCJul 26, 06:20 UTC2h 5m
2026-07-25 RYR18WB PMI → FMM Jul 25, 15:45 UTCJul 25, 17:20 UTC1h 35m
2026-07-25 RYR1YV VIE → CRL Jul 25, 13:05 UTCJul 25, 14:55 UTC1h 50m
2026-07-25 RYR8CD BVA → MLA Jul 25, 11:00 UTCJul 25, 11:50 UTC50m
2026-07-25 RYR1963 FMM → ZAD Jul 25, 09:10 UTCJul 25, 10:00 UTC50m
2026-07-25 RYR62GK PMO → FMM Jul 25, 06:40 UTCJul 25, 08:20 UTC1h 40m
2026-07-25 RYR650D FMM → PMO Jul 25, 04:15 UTCJul 25, 05:40 UTC1h 25m
2026-07-24 RYR5175 BNX → FMM Jul 24, 19:30 UTCJul 24, 20:25 UTC55m
2026-07-24 RYR82GW FMM → BNX Jul 24, 17:55 UTCJul 24, 18:45 UTC50m
2026-07-24 RYR62GK PMO → FMM Jul 24, 15:40 UTCJul 24, 17:10 UTC1h 30m
2026-07-24 RYR650D FMM → PMO Jul 24, 13:00 UTCJul 24, 14:25 UTC1h 25m
2026-07-24 RYR4HN STN → VLC Jul 24, 11:00 UTCJul 24, 11:45 UTC45m
2026-07-24 RYR7399 FMM → PUY Jul 24, 09:25 UTCJul 24, 10:05 UTC40m
2026-07-24 RYR54JB EDI → AGP Jul 24, 06:55 UTCJul 24, 08:35 UTC1h 40m
2026-07-24 RYR6002 FMM → SOF Jul 24, 04:25 UTCJul 24, 06:00 UTC1h 35m
2026-07-23 RYR5175 BNX → FMM Jul 23, 18:05 UTCJul 23, 19:05 UTC1h 0m
2026-07-23 RYR82GW FMM → BNX Jul 23, 16:35 UTCJul 23, 17:20 UTC45m
2026-07-23 RYR78UE FAO → FMM Jul 23, 13:15 UTCJul 23, 15:45 UTC2h 30m
2026-07-23 RYR6LY - Jul 23, 09:30 UTCJul 23, 12:20 UTC2h 50m
2026-07-23 RYR9EF - Jul 23, 05:55 UTCJul 23, 08:05 UTC2h 10m
2026-07-22 RYR29NH VLC → OPO Jul 22, 21:30 UTCJul 22, 22:45 UTC1h 15m
2026-07-22 RYR53NF OPO → VLC Jul 22, 19:25 UTCJul 22, 20:25 UTC1h 0m
2026-07-22 RYR92MY - Jul 22, 16:10 UTCJul 22, 18:35 UTC2h 25m
2026-07-22 RYR9EF - Jul 22, 13:00 UTCJul 22, 15:15 UTC2h 15m
2026-07-22 RYR61SZ - Jul 22, 11:10 UTCJul 22, 11:40 UTC30m
2026-07-21 RYR3LQ PFO → SKG Jul 21, 21:25 UTCJul 21, 22:20 UTC55m
2026-07-21 RYR40JE POZ → DUB Jul 21, 19:05 UTCJul 21, 20:15 UTC1h 10m
2026-07-21 RYR75MA CAG → OPO Jul 21, 16:00 UTCJul 21, 18:15 UTC2h 15m
2026-07-21 RYR998W VIT → ALC Jul 21, 13:00 UTCJul 21, 14:50 UTC1h 50m
2026-07-21 RYR51SF CRL → OPO Jul 21, 10:00 UTCJul 21, 12:00 UTC2h 0m
2026-07-21 RYR29UC OPO → CRL Jul 21, 06:25 UTCJul 21, 08:25 UTC2h 0m
2026-07-20 RYR5482 MAD → OPO Jul 20, 22:05 UTCJul 20, 22:55 UTC50m
2026-07-20 RYR39RJ OPO → MAD Jul 20, 19:55 UTCJul 20, 20:45 UTC50m
2026-07-20 RYR38MP - Jul 20, 17:05 UTCJul 20, 19:05 UTC2h 0m
2026-07-20 RYR1RN OPO → CRL Jul 20, 14:20 UTCJul 20, 16:15 UTC1h 55m
2026-07-20 RYR13SG STN → OPO Jul 20, 10:55 UTCJul 20, 12:40 UTC1h 45m
2026-07-20 RYR4EK LPA → FKB Jul 20, 08:15 UTCJul 20, 09:55 UTC1h 40m
2026-07-20 RYR1695 EDI → VLC Jul 20, 06:05 UTCJul 20, 07:35 UTC1h 30m
2026-07-19 RYR200Z LIS → STN Jul 19, 20:30 UTCJul 19, 22:45 UTC2h 15m
2026-07-19 RYR95SN STN → LIS Jul 19, 16:55 UTCJul 19, 19:30 UTC2h 35m
2026-07-19 RYR3PT - Jul 19, 14:00 UTCJul 19, 15:50 UTC1h 50m
2026-07-19 RYR54CX - Jul 19, 11:20 UTCJul 19, 13:00 UTC1h 40m
2026-07-19 RYR817L - Jul 19, 08:35 UTCJul 19, 10:15 UTC1h 40m
2026-07-19 RYR615U STN → BZR Jul 19, 06:20 UTCJul 19, 07:50 UTC1h 30m
2026-07-18 RYR9LD - Jul 18, 21:30 UTCJul 19, 00:30 UTC3h 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-DCL page for operator, model, and routing details .

Mode-S 4CA242 frequently asked

What is Mode-S code 4CA242?
4CA242 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-DCL.
Where is Mode-S 4CA242 registered?
Mode-S code 4CA242 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CA242 broadcasting right now?
Yes. Mode-S 4CA242 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CA242, octal 23121102, decimal 5,022,274.
What flights does 4CA242 operate?
Mode-S 4CA242 has broadcast 20 distinct callsigns, including RYR9WD, RYR1WZ, RYR83XQ, RYR738U, RYR6FR.