Apparatus

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sensors Mode-S transponder

4CA84B

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-EMC · BOEING 737-800

Hex
4CA84B
Octal
23124113
Decimal
5,023,819
Country
IE
Tail
EI-EMC
Type
B738
No current signal · last broadcast Jul 26, 21:55 UTC
Flights observed
639
Distinct callsigns
20
Country
IE
Last broadcast
Jul 26, 21:55 UTC

Last known position

Most recent position reported by Mode-S 4CA84B.

Country allocation

The ICAO 24-bit address 4CA84B 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
RYR8QW - 6 2026-06-27
RYR792A Ryanair 6 2026-06-04
RYR78JJ Ryanair 6 2026-06-04
RYR26NW - 6 2026-06-27
RYR11CL Ryanair 6 2026-06-05
RYR99TR Ryanair 5 2026-06-03
RYR3352 Ryanair 5 2026-06-06
RYR99NC - 4 2026-07-18
RYR633K Ryanair 4 2026-07-18
RYR2AT - 4 2026-06-27
RYR256T - 4 2026-06-27
RYR9SA Ryanair 3 2026-06-13
RYR976E Ryanair 3 2026-06-13
RYR96RB Ryanair 3 2026-06-24
RYR8ER - 3 2026-07-13
RYR8DJ - 3 2026-04-15
RYR877F Ryanair 3 2026-07-26
RYR86CT - 3 2026-06-21
RYR75TP Ryanair 3 2026-07-24
RYR73SV Ryanair 3 2026-04-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RYR877F GOA → PMO Jul 26, 20:55 UTCJul 26, 21:55 UTC1h 0m
2026-07-26 RYR31KK CRL → TNG Jul 26, 19:05 UTCJul 26, 20:10 UTC1h 5m
2026-07-26 RYR650D FMM → PMO Jul 26, 16:25 UTCJul 26, 18:05 UTC1h 40m
2026-07-26 RYR62GK PMO → FMM Jul 26, 14:15 UTCJul 26, 15:45 UTC1h 30m
2026-07-26 RYR78YR FCO → PMO Jul 26, 12:30 UTCJul 26, 13:10 UTC40m
2026-07-26 RYR29SA PMO → FCO Jul 26, 10:25 UTCJul 26, 11:15 UTC50m
2026-07-26 RYR80FQ HHN → PMO Jul 26, 07:10 UTCJul 26, 09:10 UTC2h 0m
2026-07-26 RYR2HW TRN → ACE Jul 26, 04:25 UTCJul 26, 06:20 UTC1h 55m
2026-07-25 RYR3CF PMO → VIE Jul 25, 22:15 UTCJul 25, 23:00 UTC45m
2026-07-25 RYR3788 PMO → AHO Jul 25, 20:45 UTCJul 25, 21:35 UTC50m
2026-07-25 RYR55NA TRN → PMO Jul 25, 18:15 UTCJul 25, 19:25 UTC1h 10m
2026-07-25 RYR4916 PMO → TRN Jul 25, 15:50 UTCJul 25, 17:10 UTC1h 20m
2026-07-25 RYR2DV - Jul 25, 13:55 UTCJul 25, 14:50 UTC55m
2026-07-25 RYR6VE BGY → BVA Jul 25, 12:10 UTCJul 25, 13:10 UTC1h 0m
2026-07-25 RYR9CU MRS → PFO Jul 25, 09:00 UTCJul 25, 10:40 UTC1h 40m
2026-07-25 RYR57AX - Jul 25, 06:10 UTCJul 25, 08:10 UTC2h 0m
2026-07-24 RYR38DU BTS → PMO Jul 24, 21:05 UTCJul 24, 22:30 UTC1h 25m
2026-07-24 RYR646J PMO → BTS Jul 24, 18:40 UTCJul 24, 20:20 UTC1h 40m
2026-07-24 RYR3FZ MAD → STN Jul 24, 16:35 UTCJul 24, 17:35 UTC1h 0m
2026-07-24 RYR55PN PMO → PMF Jul 24, 14:40 UTCJul 24, 15:45 UTC1h 5m
2026-07-24 RYR1GV NRN → FEZ Jul 24, 10:55 UTCJul 24, 12:00 UTC1h 5m
2026-07-24 RYR59ET PMO → VCE Jul 24, 08:45 UTCJul 24, 10:00 UTC1h 15m
2026-07-24 RYR75TP FCO → PMO Jul 24, 07:05 UTCJul 24, 07:45 UTC40m
2026-07-24 RYR8PY FKB → TFS Jul 24, 04:55 UTCJul 24, 05:40 UTC45m
2026-07-23 RYR81UZ - Jul 23, 19:30 UTCJul 23, 20:40 UTC1h 10m
2026-07-23 RYR64QD - Jul 23, 17:30 UTCJul 23, 18:50 UTC1h 20m
2026-07-23 RYR7ME - Jul 23, 15:40 UTCJul 23, 16:25 UTC45m
2026-07-23 RYR8TH - Jul 23, 13:45 UTCJul 23, 14:40 UTC55m
2026-07-23 RYR12AB CDT → STN Jul 23, 09:10 UTCJul 23, 11:00 UTC1h 50m
2026-07-23 RYR94XU CAG → BVA Jul 23, 05:35 UTCJul 23, 08:00 UTC2h 25m
2026-07-22 RYR877F GOA → PMO Jul 22, 21:25 UTCJul 22, 22:25 UTC1h 0m
2026-07-22 RYR31KK CRL → TNG Jul 22, 19:30 UTCJul 22, 20:35 UTC1h 5m
2026-07-22 RYR4057 AGP → HAM Jul 22, 16:20 UTCJul 22, 18:35 UTC2h 15m
2026-07-22 RYR47TK PMO → WMI Jul 22, 13:10 UTCJul 22, 15:20 UTC2h 10m
2026-07-22 RYR84ZP - Jul 22, 11:10 UTCJul 22, 11:25 UTC15m
2026-07-22 RYR29SA PMO → FCO Jul 22, 04:05 UTCJul 22, 04:55 UTC50m
2026-07-21 RYR3FZ - Jul 21, 20:10 UTCJul 21, 21:15 UTC1h 5m
2026-07-21 RYR55PN - Jul 21, 18:10 UTCJul 21, 19:15 UTC1h 5m
2026-07-21 RYR9CX - Jul 21, 15:30 UTCJul 21, 17:15 UTC1h 45m
2026-07-21 RYR7873 - Jul 21, 11:35 UTCJul 21, 13:45 UTC2h 10m
2026-07-21 RYR78YR - Jul 21, 09:50 UTCJul 21, 10:25 UTC35m
2026-07-21 RYR34MP PMO → FCO Jul 21, 07:40 UTCJul 21, 08:25 UTC45m
2026-07-21 RYR75TP FCO → PMO Jul 21, 05:55 UTCJul 21, 06:35 UTC40m
2026-07-21 RYR29SA PMO → FCO Jul 21, 04:00 UTCJul 21, 04:45 UTC45m
2026-07-20 RYR33RN STN → PMO Jul 20, 19:50 UTCJul 20, 22:15 UTC2h 25m
2026-07-20 RYR6CB SNN → LPA Jul 20, 15:45 UTCJul 20, 18:35 UTC2h 50m
2026-07-20 RYR73GR BLQ → PMO Jul 20, 13:00 UTCJul 20, 14:00 UTC1h 0m
2026-07-20 RYR9BV - Jul 20, 11:10 UTCJul 20, 12:15 UTC1h 5m
2026-07-20 RYR9CU MRS → PFO Jul 20, 07:55 UTCJul 20, 09:55 UTC2h 0m
2026-07-20 RYR57AX - Jul 20, 05:05 UTCJul 20, 07:10 UTC2h 5m

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

Mode-S 4CA84B frequently asked

What is Mode-S code 4CA84B?
4CA84B is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-EMC.
Where is Mode-S 4CA84B registered?
Mode-S code 4CA84B is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CA84B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CA84B, octal 23124113, decimal 5,023,819.
What flights does 4CA84B operate?
Mode-S 4CA84B has broadcast 20 distinct callsigns, including RYR8QW, RYR792A, RYR78JJ, RYR26NW, RYR11CL.