Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

4CAA57

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-EVR · BOEING 737-800

Hex
4CAA57
Octal
23125127
Decimal
5,024,343
Country
IE
Tail
EI-EVR
Type
B738
Broadcasting now · callsign RYR4SE · 38,000 ft
Flights observed
560
Distinct callsigns
20
Country
IE
Last broadcast
2h ago

Current position

4CAA57 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4CAA57 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
RYR088 Ryanair 8 2026-05-09
RYR73HD - 5 2026-04-17
RYR8GA - 4 2026-07-11
RYR89YN - 4 2026-07-14
RYR73PQ Ryanair 4 2026-05-31
RYR72ZY Ryanair 4 2026-05-10
RYR6AH Ryanair 4 2026-06-12
RYR56XL Ryanair 4 2026-06-07
RYR55XT Ryanair 4 2026-06-12
RYR4537 - 4 2026-07-12
RYR43UB - 4 2026-07-11
RYR3VH - 4 2026-07-12
RYR385 Ryanair 4 2026-05-09
RYR1XG Ryanair 4 2026-06-07
RYR17FY Ryanair 4 2026-05-09
RYR9AQ Ryanair 3 2026-04-17
RYR970Y - 3 2026-07-14
RYR8VG - 3 2026-07-14
RYR7HJ - 3 2026-07-13
RYR76RT Ryanair 3 2026-05-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 RYR6LG - Jul 15, 04:20 UTCJul 15, 06:40 UTC2h 20m
2026-07-14 RYR4HR - Jul 14, 20:45 UTCJul 14, 21:00 UTC15m
2026-07-14 RYR89YN - Jul 14, 18:20 UTCJul 14, 19:15 UTC55m
2026-07-14 RYR71ZY - Jul 14, 14:35 UTCJul 14, 17:15 UTC2h 40m
2026-07-14 RYR970Y - Jul 14, 10:20 UTCJul 14, 13:00 UTC2h 40m
2026-07-14 RYR24NN - Jul 14, 06:40 UTCJul 14, 08:45 UTC2h 5m
2026-07-14 RYR8VG - Jul 14, 04:00 UTCJul 14, 05:55 UTC1h 55m
2026-07-13 RYR3Y - Jul 13, 20:55 UTCJul 13, 22:10 UTC1h 15m
2026-07-13 RYR1945 - Jul 13, 18:50 UTCJul 13, 20:05 UTC1h 15m
2026-07-13 RYR9167 - Jul 13, 16:05 UTCJul 13, 18:05 UTC2h 0m
2026-07-13 RYR9166 - Jul 13, 13:10 UTCJul 13, 15:10 UTC2h 0m
2026-07-13 RYR4623 TLL → ARN Jul 13, 11:20 UTCJul 13, 12:05 UTC45m
2026-07-13 RYR4622 ARN → TLL Jul 13, 09:55 UTCJul 13, 10:35 UTC40m
2026-07-13 RYR3EQ - Jul 13, 07:20 UTCJul 13, 09:05 UTC1h 45m
2026-07-13 RYR7HJ ARN → CRL Jul 13, 04:30 UTCJul 13, 06:20 UTC1h 50m
2026-07-12 RYR4772 CGN → ARN Jul 12, 20:05 UTCJul 12, 21:45 UTC1h 40m
2026-07-12 RYR151B ARN → CGN Jul 12, 17:15 UTCJul 12, 19:01 UTC1h 45m
2026-07-12 RYR3VH RHO → ARN Jul 12, 12:50 UTCJul 12, 16:25 UTC3h 35m
2026-07-12 RYR4537 ARN → RHO Jul 12, 08:10 UTCJul 12, 11:45 UTC3h 35m
2026-07-11 RYR8GA - Jul 11, 16:25 UTCJul 11, 20:00 UTC3h 35m
2026-07-11 RYR43UB ARN → CHQ Jul 11, 12:05 UTCJul 11, 15:30 UTC3h 25m
2026-07-11 RYR69QH - Jul 11, 08:30 UTCJul 11, 10:40 UTC2h 10m
2026-07-11 RYR1SV - Jul 11, 05:40 UTCJul 11, 07:35 UTC1h 55m
2026-07-10 RYR3VH - Jul 10, 19:45 UTCJul 10, 23:35 UTC3h 50m
2026-07-10 RYR4537 ARN → RHO Jul 10, 15:25 UTCJul 10, 18:45 UTC3h 20m
2026-07-10 RYR6802 ALC → ARN Jul 10, 09:50 UTCJul 10, 13:40 UTC3h 50m
2026-07-10 RYR80LG ARN → ALC Jul 10, 04:15 UTCJul 10, 07:55 UTC3h 40m
2026-07-09 RYR9796 RAK → ARN Jul 9, 16:50 UTCJul 9, 21:20 UTC4h 30m
2026-07-09 RYR5JA - Jul 9, 11:15 UTCJul 9, 15:45 UTC4h 30m
2026-07-09 RYR11JL TRN → ARN Jul 9, 07:10 UTCJul 9, 09:45 UTC2h 35m
2026-07-09 RYR56BK ARN → TRN Jul 9, 04:05 UTCJul 9, 06:15 UTC2h 10m
2026-07-08 RYR8XM - Jul 8, 21:05 UTCJul 8, 23:05 UTC2h 0m
2026-07-08 RYR362D ARN → STN Jul 8, 18:15 UTCJul 8, 20:10 UTC1h 55m
2026-07-08 RYR57D RIX → ARN Jul 8, 16:20 UTCJul 8, 17:15 UTC55m
2026-07-08 RYR68QJ ARN → RIX Jul 8, 14:45 UTCJul 8, 15:35 UTC50m
2026-07-08 RYR8GA - Jul 8, 10:00 UTCJul 8, 13:45 UTC3h 45m
2026-07-08 RYR43UB - Jul 8, 05:35 UTCJul 8, 08:50 UTC3h 15m
2026-07-07 RYR89YN - Jul 7, 17:20 UTCJul 7, 18:15 UTC55m
2026-07-07 RYR71ZY - Jul 7, 13:45 UTCJul 7, 16:30 UTC2h 45m
2026-07-07 RYR970Y ARN → MRS Jul 7, 10:10 UTCJul 7, 12:50 UTC2h 40m
2026-07-07 RYR24NN - Jul 7, 06:45 UTCJul 7, 08:50 UTC2h 5m
2026-07-07 RYR8VG ARN → FKB Jul 7, 03:55 UTCJul 7, 05:50 UTC1h 55m
2026-07-06 RYR22MM - Jul 6, 17:20 UTCJul 6, 21:05 UTC3h 45m
2026-07-06 RYR3J ARN → MLA Jul 6, 13:05 UTCJul 6, 16:15 UTC3h 10m
2026-07-06 RYR4623 TLL → ARN Jul 6, 11:05 UTCJul 6, 11:50 UTC45m
2026-07-06 RYR4622 - Jul 6, 09:40 UTCJul 6, 10:20 UTC40m
2026-07-06 RYR3EQ - Jul 6, 06:55 UTCJul 6, 08:50 UTC1h 55m
2026-07-06 RYR7HJ ARN → CRL Jul 6, 04:00 UTCJul 6, 05:55 UTC1h 55m
2026-07-06 RYR159 KUN → ARN Jul 6, 00:45 UTCJul 6, 01:45 UTC1h 0m
2026-07-05 RYR4605 ARN → KUN Jul 5, 23:00 UTCJul 6, 00:00 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-EVR page for operator, model, and routing details .

Mode-S 4CAA57 frequently asked

What is Mode-S code 4CAA57?
4CAA57 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-EVR.
Where is Mode-S 4CAA57 registered?
Mode-S code 4CAA57 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAA57 broadcasting right now?
Yes. Mode-S 4CAA57 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAA57, octal 23125127, decimal 5,024,343.
What flights does 4CAA57 operate?
Mode-S 4CAA57 has broadcast 20 distinct callsigns, including RYR088, RYR73HD, RYR8GA, RYR89YN, RYR73PQ.