Apparatus

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sensors Mode-S transponder

4CA9BC

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-LRC · AIRBUS A-321neo

Hex
4CA9BC
Octal
23124674
Decimal
5,024,188
Country
IE
Tail
EI-LRC
Type
A21N
No current signal · last broadcast Jul 26, 10:25 UTC
Flights observed
264
Distinct callsigns
20
Country
IE
Last broadcast
Jul 26, 10:25 UTC

Last known position

Most recent position reported by Mode-S 4CA9BC.

Country allocation

The ICAO 24-bit address 4CA9BC 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
EIN9LT - 17 2026-07-20
EIN11T - 17 2026-07-03
EIN9AR Aer Lingus 16 2026-07-19
EIN11P - 15 2026-07-03
EIN10M Aer Lingus 15 2026-07-21
EIN1TC Aer Lingus 14 2026-07-22
EIN1XL - 13 2026-07-16
EIN1XG Aer Lingus 13 2026-07-17
EIN108 Aer Lingus 13 2026-07-26
EIN139 - 11 2026-07-11
EIN1PR - 10 2026-07-15
EIN13X - 10 2026-07-15
EIN109 Aer Lingus 10 2026-07-25
EIN138 - 8 2026-07-12
EIN9EG - 6 2026-07-07
EIN9AF - 5 2026-07-06
EIN3KM - 5 2026-07-04
EIN3GM - 5 2026-07-04
EIN119 Aer Lingus 5 2026-07-24
EIN118 Aer Lingus 5 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EIN108 JFK → DUB Jul 26, 04:05 UTCJul 26, 10:10 UTC6h 6m
2026-07-25 EIN109 DUB → JFK Jul 25, 19:10 UTCJul 26, 01:50 UTC6h 40m
2026-07-25 EIN505 BOD → DUB Jul 25, 13:50 UTCJul 25, 15:20 UTC1h 30m
2026-07-25 EIN504 DUB → BOD Jul 25, 10:10 UTCJul 25, 11:40 UTC1h 30m
2026-07-25 EIN118 IAD → DUB Jul 25, 01:00 UTCJul 25, 07:15 UTC6h 15m
2026-07-24 EIN119 DUB → IAD Jul 24, 15:45 UTCJul 24, 22:45 UTC7h 0m
2026-07-22 EIN1TC EWR → DUB Jul 22, 22:05 UTCJul 23, 03:50 UTC5h 45m
2026-07-21 EIN10M DUB → EWR Jul 21, 23:55 UTCJul 22, 00:45 UTC50m
2026-07-21 EIN10M DUB → EWR Jul 21, 13:05 UTCJul 21, 20:55 UTC7h 50m
2026-07-21 EIN52X CDG → DUB Jul 21, 08:45 UTCJul 21, 10:05 UTC1h 20m
2026-07-21 EIN52A DUB → CDG Jul 21, 06:15 UTCJul 21, 07:30 UTC1h 15m
2026-07-20 EIN1TC EWR → DUB Jul 20, 21:50 UTCJul 21, 03:40 UTC5h 49m
2026-07-20 EIN10M - Jul 20, 12:40 UTCJul 20, 19:30 UTC6h 50m
2026-07-20 EIN9LT - Jul 20, 01:20 UTCJul 20, 07:55 UTC6h 35m
2026-07-19 EIN9AR DUB → CLE Jul 19, 16:05 UTCJul 19, 23:10 UTC7h 5m
2026-07-19 EIN108 JFK → DUB Jul 19, 06:50 UTCJul 19, 12:40 UTC5h 50m
2026-07-18 EIN109 DUB → JFK Jul 18, 18:55 UTCJul 19, 01:50 UTC6h 55m
2026-07-18 EIN505 BOD → DUB Jul 18, 12:55 UTCJul 18, 14:25 UTC1h 30m
2026-07-18 EIN504 DUB → BOD Jul 18, 10:15 UTCJul 18, 11:45 UTC1h 30m
2026-07-18 EIN118 IAD → DUB Jul 18, 01:05 UTCJul 18, 07:35 UTC6h 31m
2026-07-17 EIN119 DUB → IAD Jul 17, 16:04 UTCJul 17, 23:05 UTC7h 0m
2026-07-17 EIN1XG PHL → DUB Jul 17, 01:20 UTCJul 17, 07:50 UTC6h 30m
2026-07-17 EIN1XG PHL → DUB Jul 17, 00:55 UTCJul 17, 01:09 UTC15m
2026-07-16 EIN1XL - Jul 16, 16:19 UTCJul 16, 23:25 UTC7h 5m
2026-07-16 EIN525 - Jul 16, 13:00 UTCJul 16, 14:20 UTC1h 20m
2026-07-16 EIN524 - Jul 16, 09:50 UTCJul 16, 11:05 UTC1h 15m
2026-07-15 EIN1PR - Jul 15, 23:10 UTCJul 16, 05:50 UTC6h 40m
2026-07-15 EIN13X - Jul 15, 13:50 UTCJul 15, 20:25 UTC6h 35m
2026-07-14 EIN1PR BDL → DUB Jul 14, 22:20 UTCJul 15, 05:15 UTC6h 54m
2026-07-14 EIN13X - Jul 14, 13:40 UTCJul 14, 20:35 UTC6h 55m
2026-07-14 EIN1PR - Jul 14, 01:00 UTCJul 14, 07:55 UTC6h 55m
2026-07-13 EIN13X - Jul 13, 16:05 UTCJul 13, 23:10 UTC7h 5m
2026-07-12 EIN138 BOS → DUB Jul 12, 04:35 UTCJul 12, 11:40 UTC7h 5m
2026-07-11 EIN139 - Jul 11, 19:25 UTCJul 12, 02:30 UTC7h 5m
2026-07-11 EIN205 MAN → DUB Jul 11, 11:25 UTCJul 11, 12:00 UTC35m
2026-07-11 EIN204 - Jul 11, 09:40 UTCJul 11, 10:10 UTC30m
2026-07-10 EIN1PR - Jul 10, 22:55 UTCJul 11, 05:40 UTC6h 45m
2026-07-10 EIN13X - Jul 10, 13:40 UTCJul 10, 21:05 UTC7h 26m
2026-07-09 EIN1PR - Jul 9, 23:35 UTCJul 10, 06:10 UTC6h 35m
2026-07-09 EIN13X DUB → BDL Jul 9, 14:30 UTCJul 9, 21:50 UTC7h 20m
2026-07-08 EIN1PR - Jul 8, 23:15 UTCJul 9, 06:15 UTC7h 0m
2026-07-08 EIN13X - Jul 8, 14:30 UTCJul 8, 21:25 UTC6h 55m
2026-07-08 EIN1PR - Jul 8, 00:20 UTCJul 8, 07:20 UTC7h 0m
2026-07-07 EIN13X - Jul 7, 15:10 UTCJul 7, 22:15 UTC7h 5m
2026-07-07 EIN9EG - Jul 7, 02:00 UTCJul 7, 09:20 UTC7h 20m
2026-07-06 EIN9AF - Jul 6, 16:15 UTCJul 7, 00:00 UTC7h 45m
2026-07-06 EIN992 - Jul 6, 01:05 UTCJul 6, 07:55 UTC6h 50m
2026-07-04 EIN109 - Jul 4, 19:45 UTCJul 5, 03:30 UTC7h 45m
2026-07-04 EIN3GM MUC → DUB Jul 4, 10:00 UTCJul 4, 12:15 UTC2h 15m
2026-07-04 EIN3KM DUB → MUC Jul 4, 07:00 UTCJul 4, 08:40 UTC1h 40m

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

Mode-S 4CA9BC frequently asked

What is Mode-S code 4CA9BC?
4CA9BC is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-LRC.
Where is Mode-S 4CA9BC registered?
Mode-S code 4CA9BC is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CA9BC broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 10:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CA9BC, octal 23124674, decimal 5,024,188.
What flights does 4CA9BC operate?
Mode-S 4CA9BC has broadcast 20 distinct callsigns, including EIN9LT, EIN11T, EIN9AR, EIN11P, EIN10M.