Apparatus

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sensors Mode-S transponder

4CAA41

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-EIN · AIRBUS A-330-300

Hex
4CAA41
Octal
23125101
Decimal
5,024,321
Country
IE
Tail
EI-EIN
Type
A333
No current signal · last broadcast 2h ago
Flights observed
102
Distinct callsigns
18
Country
IE
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 4CAA41.

Country allocation

The ICAO 24-bit address 4CAA41 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 18 distinct

Callsign Airline Flights Last seen
EIN961 Aer Lingus 14 2026-05-29
EIN6PE Aer Lingus 14 2026-05-27
EIN124 Aer Lingus 13 2026-05-29
EIN9MY Aer Lingus 12 2026-05-28
EIN960 Aer Lingus 12 2026-05-30
EIN1TV Aer Lingus 12 2026-05-28
EIN9DM Aer Lingus 5 2026-04-21
EIN9MR Aer Lingus 4 2026-04-22
EIN12W Aer Lingus 4 2026-05-22
EIN12G Aer Lingus 4 2026-05-23
EIN9PM Aer Lingus 1 2026-05-16
EIN9CX Aer Lingus 1 2026-05-17
EIN93T Aer Lingus 1 2026-04-23
EIN58K Aer Lingus 1 2026-04-22
EIN58G Aer Lingus 1 2026-04-22
EIN49W Aer Lingus 1 2026-04-23
EIN107 Aer Lingus 1 2026-04-23
EIN106 Aer Lingus 1 2026-04-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 EIN960 SFO → DUB May 30, 01:20 UTCMay 30, 04:10 UTC2h 50m
2026-05-29 EIN961 DUB → SFO May 29, 12:50 UTCMay 29, 23:05 UTC10h 16m
2026-05-29 EIN124 ORD → DUB May 29, 03:05 UTCMay 29, 10:20 UTC7h 15m
2026-05-28 EIN1TV DUB → ORD May 28, 16:25 UTCMay 28, 23:35 UTC7h 10m
2026-05-28 EIN9MY LAX → DUB May 28, 03:40 UTCMay 28, 13:40 UTC10h 0m
2026-05-27 EIN6PE DUB → LAX May 27, 15:30 UTCMay 28, 01:45 UTC10h 15m
2026-05-27 EIN960 SFO → DUB May 27, 01:24 UTCMay 27, 11:05 UTC9h 41m
2026-05-26 EIN961 DUB → SFO May 26, 12:45 UTCMay 26, 23:10 UTC10h 25m
2026-05-26 EIN124 ORD → DUB May 26, 03:09 UTCMay 26, 09:55 UTC6h 45m
2026-05-25 EIN1TV DUB → ORD May 25, 16:15 UTCMay 26, 00:04 UTC7h 49m
2026-05-25 EIN9MY LAX → DUB May 25, 03:15 UTCMay 25, 12:50 UTC9h 35m
2026-05-24 EIN6PE DUB → LAX May 24, 15:00 UTCMay 24, 23:46 UTC8h 46m
2026-05-24 EIN960 SFO → DUB May 24, 01:10 UTCMay 24, 10:30 UTC9h 20m
2026-05-23 EIN961 DUB → SFO May 23, 12:40 UTCMay 23, 22:55 UTC10h 15m
2026-05-23 EIN12G MCO → DUB May 23, 00:10 UTCMay 23, 07:25 UTC7h 14m
2026-05-22 EIN12W DUB → MCO May 22, 13:15 UTCMay 22, 21:35 UTC8h 20m
2026-05-22 EIN960 SFO → DUB May 22, 01:05 UTCMay 22, 10:25 UTC9h 20m
2026-05-21 EIN961 DUB → SFO May 21, 12:30 UTCMay 21, 22:20 UTC9h 50m
2026-05-20 EIN9MY LAX → DUB May 20, 03:35 UTCMay 20, 12:40 UTC9h 6m
2026-05-19 EIN6PE DUB → LAX May 19, 14:45 UTCMay 20, 01:00 UTC10h 15m
2026-05-19 EIN12G MCO → DUB May 19, 00:10 UTCMay 19, 07:55 UTC7h 45m
2026-05-18 EIN12W DUB → MCO May 18, 13:10 UTCMay 18, 21:20 UTC8h 9m
2026-05-18 EIN960 SFO → DUB May 18, 01:40 UTCMay 18, 10:50 UTC9h 10m
2026-05-17 EIN961 DUB → SFO May 17, 13:31 UTCMay 17, 23:35 UTC10h 5m
2026-05-17 EIN9CX DEN → DUB May 17, 02:15 UTCMay 17, 10:05 UTC7h 50m
2026-05-16 EIN9PM DUB → DEN May 16, 15:25 UTCMay 17, 00:20 UTC8h 55m
2026-05-16 EIN9MY LAX → DUB May 16, 03:50 UTCMay 16, 12:50 UTC9h 1m
2026-05-13 EIN6PE DUB → LAX May 13, 14:51 UTCMay 14, 01:25 UTC10h 35m
2026-05-12 EIN124 ORD → DUB May 12, 08:25 UTCMay 12, 09:15 UTC50m
2026-05-12 EIN124 ORD → DUB May 12, 04:40 UTCMay 12, 05:00 UTC20m
2026-05-12 EIN124 ORD → DUB May 12, 02:45 UTCMay 12, 04:35 UTC1h 50m
2026-05-11 EIN1TV DUB → ORD May 11, 16:05 UTCMay 11, 22:35 UTC6h 30m
2026-05-11 EIN9MY LAX → DUB May 11, 03:35 UTCMay 11, 13:20 UTC9h 45m
2026-05-10 EIN6PE DUB → LAX May 10, 14:49 UTCMay 11, 00:54 UTC10h 5m
2026-05-10 EIN960 SFO → DUB May 10, 01:09 UTCMay 10, 11:05 UTC9h 55m
2026-05-09 EIN961 DUB → SFO May 9, 12:25 UTCMay 9, 22:30 UTC10h 5m
2026-05-09 EIN12G MCO → DUB May 9, 00:45 UTCMay 9, 08:30 UTC7h 45m
2026-05-08 EIN12W DUB → MCO May 8, 13:05 UTCMay 8, 22:00 UTC8h 55m
2026-05-08 EIN960 SFO → DUB May 8, 01:00 UTCMay 8, 10:39 UTC9h 40m
2026-05-07 EIN961 DUB → SFO May 7, 12:15 UTCMay 7, 22:00 UTC9h 45m
2026-05-07 EIN124 ORD → DUB May 7, 03:15 UTCMay 7, 09:55 UTC6h 40m
2026-05-06 EIN1TV DUB → ORD May 6, 15:55 UTCMay 6, 23:40 UTC7h 44m
2026-05-06 EIN9MY LAX → DUB May 6, 03:35 UTCMay 6, 13:05 UTC9h 30m
2026-05-05 EIN6PE DUB → LAX May 5, 14:40 UTCMay 6, 00:25 UTC9h 45m
2026-05-05 EIN960 SFO → DUB May 5, 01:05 UTCMay 5, 10:35 UTC9h 30m
2026-05-04 EIN961 DUB → SFO May 4, 12:20 UTCMay 4, 22:25 UTC10h 6m
2026-05-04 EIN124 ORD → DUB May 4, 02:30 UTCMay 4, 09:30 UTC7h 0m
2026-05-03 EIN1TV DUB → ORD May 3, 16:05 UTCMay 3, 23:45 UTC7h 40m
2026-05-03 EIN9MY LAX → DUB May 3, 03:15 UTCMay 3, 13:05 UTC9h 49m
2026-05-02 EIN6PE DUB → LAX May 2, 14:45 UTCMay 3, 01:00 UTC10h 15m

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

Mode-S 4CAA41 frequently asked

What is Mode-S code 4CAA41?
4CAA41 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-EIN.
Where is Mode-S 4CAA41 registered?
Mode-S code 4CAA41 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAA41 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAA41, octal 23125101, decimal 5,024,321.
What flights does 4CAA41 operate?
Mode-S 4CAA41 has broadcast 18 distinct callsigns, including EIN961, EIN6PE, EIN124, EIN9MY, EIN960.