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sensors Mode-S transponder

4CAAF1

ICAO 24-bit transponder address · allocated to Ireland

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

Hex
4CAAF1
Octal
23125361
Decimal
5,024,497
Country
IE
Tail
EI-EIK
Type
A333
No current signal · last broadcast 1h ago
Flights observed
215
Distinct callsigns
20
Country
IE
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 4CAAF1.

Country allocation

The ICAO 24-bit address 4CAAF1 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
EIN123 - 39 2026-07-13
EIN122 - 37 2026-07-13
EIN580 - 25 2026-07-14
EIN581 - 24 2026-07-12
EIN1GA - 23 2026-07-12
EIN1AW - 23 2026-07-13
EIN1EN - 6 2026-07-06
EIN12W - 5 2026-07-08
EIN12G - 5 2026-07-09
EIN1MN - 4 2026-07-06
EIN119 - 4 2026-07-05
EIN118 - 3 2026-07-05
EIN13K - 2 2026-07-02
EIN13J - 2 2026-07-02
EIN105 - 2 2026-06-12
EIN104 Aer Lingus 2 2026-06-12
EIN5KE - 1 2026-07-03
EIN5HA Aer Lingus 1 2026-05-05
EIN59K - 1 2026-07-03
EIN58Y Aer Lingus 1 2026-05-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 EIN580 - Jul 14, 07:05 UTCJul 14, 09:40 UTC2h 35m
2026-07-13 EIN122 ORD → DUB Jul 13, 20:50 UTCJul 14, 03:55 UTC7h 5m
2026-07-13 EIN123 DUB → ORD Jul 13, 11:00 UTCJul 13, 18:15 UTC7h 15m
2026-07-13 EIN1AW - Jul 13, 01:25 UTCJul 13, 07:01 UTC5h 35m
2026-07-12 EIN1GA DUB → BOS Jul 12, 16:15 UTCJul 12, 22:25 UTC6h 10m
2026-07-12 EIN581 - Jul 12, 11:15 UTCJul 12, 14:01 UTC2h 45m
2026-07-12 EIN580 - Jul 12, 07:01 UTCJul 12, 09:35 UTC2h 35m
2026-07-11 EIN122 ORD → DUB Jul 11, 21:10 UTCJul 12, 04:01 UTC6h 50m
2026-07-11 EIN123 DUB → ORD Jul 11, 10:55 UTCJul 11, 18:35 UTC7h 40m
2026-07-11 EIN1AW BOS → DUB Jul 11, 01:25 UTCJul 11, 06:55 UTC5h 30m
2026-07-10 EIN1GA DUB → BOS Jul 10, 16:00 UTCJul 10, 22:35 UTC6h 35m
2026-07-10 EIN581 - Jul 10, 11:10 UTCJul 10, 13:40 UTC2h 30m
2026-07-10 EIN580 - Jul 10, 07:00 UTCJul 10, 09:35 UTC2h 35m
2026-07-09 EIN122 ORD → DUB Jul 9, 21:15 UTCJul 10, 03:50 UTC6h 35m
2026-07-09 EIN123 DUB → ORD Jul 9, 10:50 UTCJul 9, 18:40 UTC7h 50m
2026-07-09 EIN12G MCO → DUB Jul 9, 00:25 UTCJul 9, 08:15 UTC7h 50m
2026-07-08 EIN12W DUB → MCO Jul 8, 13:30 UTCJul 8, 22:00 UTC8h 30m
2026-07-08 EIN1AW BOS → DUB Jul 8, 01:30 UTCJul 8, 07:10 UTC5h 40m
2026-07-07 EIN1GA DUB → BOS Jul 7, 16:50 UTCJul 7, 22:55 UTC6h 5m
2026-07-07 EIN581 - Jul 7, 11:10 UTCJul 7, 13:50 UTC2h 40m
2026-07-07 EIN580 - Jul 7, 06:35 UTCJul 7, 09:15 UTC2h 40m
2026-07-06 EIN1MN YYZ → DUB Jul 6, 21:55 UTCJul 7, 03:50 UTC5h 55m
2026-07-06 EIN1EN DUB → YYZ Jul 6, 12:50 UTCJul 6, 19:45 UTC6h 55m
2026-07-06 EIN12G MCO → DUB Jul 6, 00:25 UTCJul 6, 07:35 UTC7h 10m
2026-07-05 EIN12W - Jul 5, 13:15 UTCJul 5, 22:05 UTC8h 50m
2026-07-05 EIN118 IAD → DUB Jul 5, 03:25 UTCJul 5, 09:40 UTC6h 15m
2026-07-05 EIN119 - Jul 5, 00:30 UTCJul 5, 00:50 UTC20m
2026-07-04 EIN119 - Jul 4, 15:55 UTCJul 5, 00:25 UTC8h 30m
2026-07-04 EIN118 IAD → DUB Jul 4, 01:25 UTCJul 4, 07:35 UTC6h 10m
2026-07-03 EIN119 DUB → IAD Jul 3, 16:15 UTCJul 3, 23:40 UTC7h 25m
2026-07-03 EIN5KE MAD → DUB Jul 3, 11:45 UTCJul 3, 13:55 UTC2h 10m
2026-07-03 EIN59K - Jul 3, 07:45 UTCJul 3, 09:40 UTC1h 55m
2026-07-02 EIN13K BOS → DUB Jul 2, 21:40 UTCJul 3, 03:00 UTC5h 20m
2026-07-02 EIN13J DUB → BOS Jul 2, 12:30 UTCJul 2, 19:00 UTC6h 30m
2026-07-01 EIN122 - Jul 1, 21:50 UTCJul 2, 04:25 UTC6h 35m
2026-07-01 EIN123 DUB → ORD Jul 1, 11:10 UTCJul 1, 19:10 UTC8h 0m
2026-07-01 EIN1AW BOS → DUB Jul 1, 01:25 UTCJul 1, 06:55 UTC5h 30m
2026-06-30 EIN1GA - Jun 30, 16:30 UTCJun 30, 22:50 UTC6h 20m
2026-06-30 EIN581 - Jun 30, 11:15 UTCJun 30, 14:00 UTC2h 45m
2026-06-30 EIN580 - Jun 30, 07:05 UTCJun 30, 09:30 UTC2h 25m
2026-06-29 EIN1AW BOS → DUB Jun 29, 01:20 UTCJun 29, 06:50 UTC5h 30m
2026-06-28 EIN1GA DUB → BOS Jun 28, 16:25 UTCJun 28, 22:45 UTC6h 20m
2026-06-28 EIN581 - Jun 28, 11:04 UTCJun 28, 13:40 UTC2h 35m
2026-06-28 EIN580 - Jun 28, 06:55 UTCJun 28, 09:30 UTC2h 35m
2026-06-27 EIN122 ORD → DUB Jun 27, 20:55 UTCJun 28, 03:40 UTC6h 45m
2026-06-27 EIN123 DUB → ORD Jun 27, 11:04 UTCJun 27, 18:35 UTC7h 30m
2026-06-27 EIN1AW BOS → DUB Jun 27, 01:35 UTCJun 27, 06:54 UTC5h 20m
2026-06-26 EIN1GA DUB → BOS Jun 26, 16:20 UTCJun 26, 22:34 UTC6h 15m
2026-06-26 EIN581 - Jun 26, 11:00 UTCJun 26, 13:19 UTC2h 20m
2026-06-26 EIN580 - Jun 26, 07:00 UTCJun 26, 09:45 UTC2h 45m

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

Mode-S 4CAAF1 frequently asked

What is Mode-S code 4CAAF1?
4CAAF1 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-EIK.
Where is Mode-S 4CAAF1 registered?
Mode-S code 4CAAF1 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAAF1 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAAF1, octal 23125361, decimal 5,024,497.
What flights does 4CAAF1 operate?
Mode-S 4CAAF1 has broadcast 20 distinct callsigns, including EIN123, EIN122, EIN580, EIN581, EIN1GA.