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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 RYR9BV · 21,925 ft
Flights observed
636
Distinct callsigns
20
Country
IE
Last broadcast
Jul 26, 21:45 UTC

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
2026-07-26 RYR93SC PEG → STN Jul 26, 20:55 UTCJul 26, 21:45 UTC50m
2026-07-26 RYR70SV DUB → LGW Jul 26, 18:50 UTCJul 26, 19:45 UTC55m
2026-07-26 RYR38WP PRG → DUB Jul 26, 14:50 UTCJul 26, 17:15 UTC2h 25m
2026-07-26 RYR8LV CRL → PRG Jul 26, 11:55 UTCJul 26, 13:40 UTC1h 45m
2026-07-26 RYR8RH BGY → DUB Jul 26, 08:40 UTCJul 26, 10:55 UTC2h 15m
2026-07-26 RYR46YM LUX → MRS Jul 26, 05:45 UTCJul 26, 07:40 UTC1h 56m
2026-07-25 RYR459M EDI → DUB Jul 25, 21:45 UTCJul 25, 22:25 UTC40m
2026-07-25 RYR2SH WRO → STN Jul 25, 20:10 UTCJul 25, 20:50 UTC40m
2026-07-25 RYR3MA FAO → DUB Jul 25, 16:25 UTCJul 25, 19:10 UTC2h 45m
2026-07-25 RYR15EP DUB → FAO Jul 25, 13:10 UTCJul 25, 15:30 UTC2h 20m
2026-07-25 RYR7901 FMM → BNX Jul 25, 11:30 UTCJul 25, 12:00 UTC30m
2026-07-25 RYR5151 DUB → GLA Jul 25, 10:05 UTCJul 25, 10:45 UTC40m
2026-07-25 RYR720F LPL → DUB Jul 25, 08:35 UTCJul 25, 09:10 UTC35m
2026-07-25 RYR2SM REU → LPL Jul 25, 07:25 UTCJul 25, 07:55 UTC30m
2026-07-25 RYR2SM REU → LPL Jul 25, 06:50 UTCJul 25, 07:10 UTC20m
2026-07-24 RYR63WW KRK → DUB Jul 24, 22:45 UTCJul 25, 01:10 UTC2h 25m
2026-07-24 RYR2SE POZ → MAN Jul 24, 19:30 UTCJul 24, 21:50 UTC2h 20m
2026-07-24 RYR88VB STN → DUB Jul 24, 17:25 UTCJul 24, 18:15 UTC50m
2026-07-24 RYR73SF DUB → STN Jul 24, 15:40 UTCJul 24, 16:35 UTC55m
2026-07-24 RYR6MK FAO → DUB Jul 24, 12:00 UTCJul 24, 14:30 UTC2h 30m
2026-07-24 RYR9NN PMO → CAG Jul 24, 08:25 UTCJul 24, 11:00 UTC2h 35m
2026-07-24 RYR2PN NCL → MAH Jul 24, 06:35 UTCJul 24, 07:15 UTC40m
2026-07-24 RYR3B CAG → BGY Jul 24, 05:15 UTCJul 24, 05:50 UTC35m
2026-07-23 RYR535 EMA → DUB Jul 23, 21:20 UTCJul 23, 21:55 UTC35m
2026-07-23 RYR62LK DUB → EMA Jul 23, 19:50 UTCJul 23, 20:30 UTC40m
2026-07-23 RYR5TG CRL → ARN Jul 23, 16:35 UTCJul 23, 18:50 UTC2h 15m
2026-07-23 RYR7132 DUB → FAO Jul 23, 12:35 UTCJul 23, 15:15 UTC2h 40m
2026-07-23 RYR4CU VNO → BCN Jul 23, 09:10 UTCJul 23, 11:20 UTC2h 10m
2026-07-22 RYR4ZF PMI → LTN Jul 22, 16:45 UTCJul 22, 19:25 UTC2h 40m
2026-07-22 RYR65JW - Jul 22, 13:05 UTCJul 22, 15:25 UTC2h 20m
2026-07-22 RYR34DP - Jul 22, 11:10 UTCJul 22, 12:10 UTC1h 0m
2026-07-21 RYR6AZ - Jul 21, 23:40 UTCJul 22, 01:10 UTC1h 30m
2026-07-21 RYR5SY - Jul 21, 21:25 UTCJul 21, 22:50 UTC1h 25m
2026-07-21 RYR65YK - Jul 21, 18:20 UTCJul 21, 20:25 UTC2h 5m
2026-07-21 RYR52RY - Jul 21, 15:15 UTCJul 21, 17:20 UTC2h 5m
2026-07-21 RYR76UD - Jul 21, 12:05 UTCJul 21, 13:55 UTC1h 50m
2026-07-21 RYR2ZX - Jul 21, 08:55 UTCJul 21, 10:25 UTC1h 30m
2026-07-21 RYR7GR - Jul 21, 07:10 UTCJul 21, 07:55 UTC45m
2026-07-21 RYR7PC STN → EIN Jul 21, 05:40 UTCJul 21, 06:20 UTC40m
2026-07-20 RYR915B KRK → STN Jul 20, 19:40 UTCJul 20, 21:35 UTC1h 55m
2026-07-20 RYR53GQ - Jul 20, 17:05 UTCJul 20, 18:55 UTC1h 50m
2026-07-20 RYR57MU CPH → STN Jul 20, 14:45 UTCJul 20, 16:10 UTC1h 25m
2026-07-20 RYR99WT STN → CPH Jul 20, 12:35 UTCJul 20, 13:50 UTC1h 15m
2026-07-20 RYR6QP - Jul 20, 09:05 UTCJul 20, 11:00 UTC1h 55m
2026-07-20 RYR4KD - Jul 20, 06:20 UTCJul 20, 08:15 UTC1h 55m
2026-07-19 RYR2KN - Jul 19, 21:30 UTCJul 19, 23:40 UTC2h 10m
2026-07-19 RYR44TT - Jul 19, 16:45 UTCJul 19, 19:10 UTC2h 25m
2026-07-19 RYR84LQ - Jul 19, 13:10 UTCJul 19, 15:15 UTC2h 5m
2026-07-19 RYR2GP - Jul 19, 10:50 UTCJul 19, 11:55 UTC1h 5m
2026-07-19 RYR564P - Jul 19, 09:10 UTCJul 19, 10:05 UTC55m

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.