sensors Mode-S transponder

4CABD1

ICAO 24-bit transponder address · allocated to Ireland

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

Hex
4CABD1
Octal
23125721
Decimal
5,024,721
Country
IE
Tail
EI-LRE
Type
A21N
Broadcasting now · callsign EIN1YL · 20,775 ft
Flights observed
12
Distinct callsigns
6
Country
IE
Last broadcast
12h ago

Current position

4CABD1 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4CABD1 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 6 distinct

Callsign Airline Flights Last seen
EIN38A - 3 2026-04-14
EIN1EA - 3 2026-04-13
EIN381 Aer Lingus 2 2026-04-14
EIN1AC - 2 2026-04-13
EIN1YL Aer Lingus 1 2026-04-13
EIN1LH - 1 2026-04-12

Recent flights last 12

DateFlightRouteTakeoffLandingDuration
2026-04-14 EIN381 LHR → SNN Apr 14, 09:20 UTCApr 14, 10:15 UTC55m
2026-04-14 EIN38A - Apr 14, 07:10 UTCApr 14, 07:30 UTC20m
2026-04-14 EIN38A - Apr 14, 06:45 UTCApr 14, 07:10 UTC25m
2026-04-13 EIN1YL BOS → SNN Apr 13, 22:35 UTCApr 13, 23:40 UTC1h 5m
2026-04-13 EIN1AC - Apr 13, 17:45 UTCApr 13, 19:10 UTC1h 25m
2026-04-13 EIN1AC - Apr 13, 12:55 UTCApr 13, 13:30 UTC35m
2026-04-13 EIN381 LHR → SNN Apr 13, 09:40 UTCApr 13, 10:35 UTC55m
2026-04-13 EIN38A - Apr 13, 06:40 UTCApr 13, 07:40 UTC1h 0m
2026-04-13 EIN1EA - Apr 13, 03:55 UTCApr 13, 04:10 UTC15m
2026-04-13 EIN1EA - Apr 13, 00:20 UTCApr 13, 04:10 UTC3h 50m
2026-04-12 EIN1EA - Apr 12, 23:55 UTCApr 13, 03:50 UTC3h 55m
2026-04-12 EIN1LH - Apr 12, 18:45 UTCApr 12, 20:15 UTC1h 30m

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

Mode-S 4CABD1 frequently asked

What is Mode-S code 4CABD1?
4CABD1 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-LRE.
Where is Mode-S 4CABD1 registered?
Mode-S code 4CABD1 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CABD1 broadcasting right now?
Yes. Mode-S 4CABD1 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CABD1, octal 23125721, decimal 5,024,721.
What flights does 4CABD1 operate?
Mode-S 4CABD1 has broadcast 6 distinct callsigns, including EIN38A, EIN1EA, EIN381, EIN1AC, EIN1YL.