Apparatus

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sensors Mode-S transponder

4CA738

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-EBO · BOEING 737-800

Hex
4CA738
Octal
23123470
Decimal
5,023,544
Country
IE
Tail
EI-EBO
Type
B738
Broadcasting now · callsign RYR63XT · 36,000 ft
Flights observed
650
Distinct callsigns
20
Country
IE
Last broadcast
Jul 26, 22:00 UTC

Current position

4CA738 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4CA738 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
RYR83VW - 4 2026-06-19
RYR3PW - 4 2026-06-26
RYR3074 - 4 2026-06-19
RYR87LT - 3 2026-06-25
RYR8658 Ryanair 3 2026-05-26
RYR75ND - 3 2026-04-13
RYR65QN - 3 2026-06-23
RYR611A Ryanair 3 2026-04-18
RYR578E Ryanair 3 2026-06-17
RYR4VW Ryanair 3 2026-04-13
RYR47YN - 3 2026-04-13
RYR44SA Ryanair 3 2026-05-26
RYR41LL - 3 2026-06-18
RYR21GB - 3 2026-06-18
RYR1VB - 3 2026-06-23
RYR1UQ - 3 2026-06-27
RYR9PX - 2 2026-07-04
RYR9K - 2 2026-06-20
RYR9CZ - 2 2026-07-03
RYR96GG Ryanair 2 2026-05-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RYR84RP KRK → BGY Jul 26, 21:05 UTCJul 26, 22:00 UTC55m
2026-07-26 RYR81SD BGY → KRK Jul 26, 18:45 UTCJul 26, 20:10 UTC1h 25m
2026-07-26 RYR10AQ PMO → BGY Jul 26, 16:15 UTCJul 26, 17:35 UTC1h 20m
2026-07-26 RYR57YY BGY → PMO Jul 26, 13:05 UTCJul 26, 14:10 UTC1h 5m
2026-07-26 RYR40NP WMI → BGY Jul 26, 09:50 UTCJul 26, 11:25 UTC1h 35m
2026-07-26 RYR6YV BGY → WMI Jul 26, 07:20 UTCJul 26, 08:55 UTC1h 35m
2026-07-26 RYR6098 ARN → GDN Jul 26, 04:25 UTCJul 26, 05:55 UTC1h 30m
2026-07-25 RYR6091 BGY → LPA Jul 25, 16:15 UTCJul 26, 00:20 UTC8h 5m
2026-07-25 RYR9373 BRQ → BGY Jul 25, 12:30 UTCJul 25, 13:40 UTC1h 10m
2026-07-25 RYR5RK DUB → FCO Jul 25, 10:50 UTCJul 25, 11:55 UTC1h 5m
2026-07-25 RYR52XB KRK → BGY Jul 25, 08:45 UTCJul 25, 10:05 UTC1h 20m
2026-07-25 RYR76PX BGY → KRK Jul 25, 06:25 UTCJul 25, 07:45 UTC1h 20m
2026-07-24 RYR9AZ - Jul 24, 21:25 UTCJul 24, 22:30 UTC1h 5m
2026-07-24 RYR5876 BGY → BVA Jul 24, 19:25 UTCJul 24, 20:35 UTC1h 10m
2026-07-24 RYR33VK BRI → KUN Jul 24, 15:15 UTCJul 24, 18:05 UTC2h 50m
2026-07-24 RYR45MK BGY → RHO Jul 24, 11:15 UTCJul 24, 13:30 UTC2h 15m
2026-07-24 RYR80VE STN → SCQ Jul 24, 07:25 UTCJul 24, 09:45 UTC2h 20m
2026-07-24 RYR5XF CPH → ALC Jul 24, 04:05 UTCJul 24, 06:35 UTC2h 30m
2026-07-23 RYR13PK PMO → BGY Jul 23, 23:45 UTCJul 24, 00:55 UTC1h 10m
2026-07-23 RYR26AB - Jul 23, 21:25 UTCJul 23, 22:55 UTC1h 30m
2026-07-23 RYR33VK BRI → KUN Jul 23, 12:35 UTCJul 23, 15:25 UTC2h 50m
2026-07-23 RYR45MK BGY → RHO Jul 23, 09:20 UTCJul 23, 11:40 UTC2h 20m
2026-07-23 RYR8SL KRK → SUF Jul 23, 07:15 UTCJul 23, 08:20 UTC1h 5m
2026-07-23 RYR3GD DUB → STN Jul 23, 05:20 UTCJul 23, 06:10 UTC50m
2026-07-23 RYR9MV TIA → BGY Jul 23, 00:05 UTCJul 23, 01:25 UTC1h 20m
2026-07-22 RYR21FQ BGY → TIA Jul 22, 21:55 UTCJul 22, 22:55 UTC1h 0m
2026-07-22 RYR873M CRL → BGY Jul 22, 19:45 UTCJul 22, 20:45 UTC1h 0m
2026-07-22 RYR29GX BGY → CRL Jul 22, 17:55 UTCJul 22, 19:00 UTC1h 5m
2026-07-22 RYR80GB - Jul 22, 14:30 UTCJul 22, 15:50 UTC1h 20m
2026-07-22 RYR63UE BDS → STN Jul 22, 11:30 UTCJul 22, 13:30 UTC2h 0m
2026-07-22 RYR54FN VCE → BDS Jul 22, 04:35 UTCJul 22, 05:25 UTC50m
2026-07-21 RYR5ZL BRI → VCE Jul 21, 20:40 UTCJul 21, 21:45 UTC1h 5m
2026-07-21 RYR95AT - Jul 21, 18:50 UTCJul 21, 19:55 UTC1h 5m
2026-07-21 RYR3WM BRS → DUB Jul 21, 16:10 UTCJul 21, 17:30 UTC1h 20m
2026-07-21 RYR82QT - Jul 21, 14:00 UTCJul 21, 15:10 UTC1h 10m
2026-07-21 RYR6WA - Jul 21, 11:10 UTCJul 21, 12:55 UTC1h 45m
2026-07-21 RYR90SF DUB → MAD Jul 21, 06:40 UTCJul 21, 08:45 UTC2h 5m
2026-07-20 RYR7SZ CFU → VIE Jul 20, 21:05 UTCJul 20, 23:20 UTC2h 15m
2026-07-20 RYR1BT DUB → VCE Jul 20, 18:00 UTCJul 20, 20:05 UTC2h 5m
2026-07-20 RYR72UW - Jul 20, 14:40 UTCJul 20, 16:55 UTC2h 15m
2026-07-20 RYR7LM MAN → CHQ Jul 20, 11:30 UTCJul 20, 13:45 UTC2h 15m
2026-07-20 RYR96SR - Jul 20, 10:00 UTCJul 20, 10:40 UTC40m
2026-07-20 RYR6NY - Jul 20, 08:35 UTCJul 20, 09:05 UTC30m
2026-07-19 RYR3LP - Jul 19, 21:55 UTCJul 19, 22:45 UTC50m
2026-07-19 RYR14MJ - Jul 19, 18:30 UTCJul 19, 20:50 UTC2h 20m
2026-07-19 RYR96TN TRN → PSR Jul 19, 16:00 UTCJul 19, 16:55 UTC55m
2026-07-19 RYR9KB STN → PMO Jul 19, 13:55 UTCJul 19, 15:00 UTC1h 5m
2026-07-19 RYR10UK CRL → PSR Jul 19, 11:30 UTCJul 19, 12:55 UTC1h 25m
2026-07-19 RYR80KA - Jul 19, 08:35 UTCJul 19, 10:20 UTC1h 45m
2026-07-19 RYR83AU LPA → SCQ Jul 19, 07:00 UTCJul 19, 07:45 UTC45m

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

Mode-S 4CA738 frequently asked

What is Mode-S code 4CA738?
4CA738 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-EBO.
Where is Mode-S 4CA738 registered?
Mode-S code 4CA738 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CA738 broadcasting right now?
Yes. Mode-S 4CA738 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CA738, octal 23123470, decimal 5,023,544.
What flights does 4CA738 operate?
Mode-S 4CA738 has broadcast 20 distinct callsigns, including RYR83VW, RYR3PW, RYR3074, RYR87LT, RYR8658.