Apparatus

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sensors Mode-S transponder

4CAD42

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-SIO · AIRBUS A-320neo

Hex
4CAD42
Octal
23126502
Decimal
5,025,090
Country
IE
Tail
EI-SIO
Type
A20N
No current signal · last broadcast 43m ago
Flights observed
254
Distinct callsigns
20
Country
IE
Last broadcast
43m ago

Last known position

Most recent position reported by Mode-S 4CAD42.

Country allocation

The ICAO 24-bit address 4CAD42 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
SAS88P Scandinavian Airlines System 7 2026-05-29
SAS85A Scandinavian Airlines System 7 2026-05-29
SAS92U Scandinavian Airlines System 6 2026-05-29
SAS581 Scandinavian Airlines System 6 2026-05-29
SAS63Y Scandinavian Airlines System 5 2026-05-24
SAS65D Scandinavian Airlines System 4 2026-05-22
SAS588 Scandinavian Airlines System 4 2026-05-24
SAS51B Scandinavian Airlines System 4 2026-05-22
SAS41A - 4 2026-04-19
SAS1829 Scandinavian Airlines System 4 2026-04-19
SAS96C Scandinavian Airlines System 3 2026-05-24
SAS84B - 3 2026-04-16
SAS753 Scandinavian Airlines System 3 2026-05-26
SAS688 Scandinavian Airlines System 3 2026-04-27
SAS67L Scandinavian Airlines System 3 2026-05-28
SAS594 Scandinavian Airlines System 3 2026-05-28
SAS57B Scandinavian Airlines System 3 2026-05-28
SAS542 Scandinavian Airlines System 3 2026-05-05
SAS541 Scandinavian Airlines System 3 2026-05-05
SAS30T Scandinavian Airlines System 3 2026-05-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 SAS32F CPH → DUB May 30, 06:25 UTCMay 30, 08:15 UTC1h 50m
2026-05-29 SAS88P DUB → CPH May 29, 18:30 UTCMay 29, 20:15 UTC1h 45m
2026-05-29 SAS85A CPH → DUB May 29, 15:20 UTCMay 29, 17:10 UTC1h 50m
2026-05-29 SAS92U MAD → CPH May 29, 11:10 UTCMay 29, 14:00 UTC2h 50m
2026-05-29 SAS581 CPH → MAD May 29, 06:50 UTCMay 29, 09:35 UTC2h 45m
2026-05-28 SAS67L BGO → CPH May 28, 18:50 UTCMay 28, 19:45 UTC55m
2026-05-28 SAS2872 CPH → BGO May 28, 17:05 UTCMay 28, 18:05 UTC1h 0m
2026-05-28 SAS1713 HEL → CPH May 28, 14:55 UTCMay 28, 16:05 UTC1h 10m
2026-05-28 SAS1712 CPH → HEL May 28, 12:05 UTCMay 28, 13:35 UTC1h 30m
2026-05-28 SAS594 BRU → CPH May 28, 08:40 UTCMay 28, 09:50 UTC1h 10m
2026-05-28 SAS57B CPH → BRU May 28, 06:15 UTCMay 28, 07:35 UTC1h 20m
2026-05-27 SAS88P DUB → CPH May 27, 18:35 UTCMay 27, 20:15 UTC1h 40m
2026-05-27 SAS85A CPH → DUB May 27, 15:25 UTCMay 27, 17:25 UTC2h 0m
2026-05-27 SAS92U MAD → CPH May 27, 11:30 UTCMay 27, 14:05 UTC2h 35m
2026-05-27 SAS581 CPH → MAD May 27, 07:00 UTCMay 27, 10:00 UTC3h 0m
2026-05-27 SAS1758 GDN → CPH May 27, 03:59 UTCMay 27, 04:49 UTC50m
2026-05-26 SAS753 CPH → GDN May 26, 21:14 UTCMay 26, 21:55 UTC40m
2026-05-26 SAS88P DUB → CPH May 26, 18:19 UTCMay 26, 20:00 UTC1h 40m
2026-05-26 SAS85A CPH → DUB May 26, 15:20 UTCMay 26, 17:20 UTC2h 0m
2026-05-26 SAS92U MAD → CPH May 26, 11:20 UTCMay 26, 13:54 UTC2h 35m
2026-05-26 SAS581 CPH → MAD May 26, 06:49 UTCMay 26, 09:45 UTC2h 55m
2026-05-25 SAS88P DUB → CPH May 25, 18:25 UTCMay 25, 20:24 UTC2h 0m
2026-05-25 SAS85A CPH → DUB May 25, 15:35 UTCMay 25, 17:25 UTC1h 50m
2026-05-25 SAS92U MAD → CPH May 25, 11:45 UTCMay 25, 14:30 UTC2h 45m
2026-05-25 SAS581 CPH → MAD May 25, 06:45 UTCMay 25, 09:30 UTC2h 45m
2026-05-24 SAS30T PMI → CPH May 24, 18:05 UTCMay 24, 21:00 UTC2h 55m
2026-05-24 SAS96C CPH → PMI May 24, 14:25 UTCMay 24, 17:05 UTC2h 40m
2026-05-24 SAS588 AGP → CPH May 24, 09:55 UTCMay 24, 13:05 UTC3h 10m
2026-05-24 SAS63Y CPH → AGP May 24, 08:05 UTCMay 24, 08:35 UTC30m
2026-05-24 SAS63Y CPH → AGP May 24, 05:20 UTCMay 24, 08:00 UTC2h 40m
2026-05-23 SAS2838 LPA → CPH May 23, 14:40 UTCMay 23, 19:35 UTC4h 55m
2026-05-23 SAS2837 CPH → LPA May 23, 08:20 UTCMay 23, 13:20 UTC5h 0m
2026-05-22 SAS51B BCN → CPH May 22, 17:10 UTCMay 22, 19:45 UTC2h 35m
2026-05-22 SAS65D CPH → BCN May 22, 13:30 UTCMay 22, 15:50 UTC2h 20m
2026-05-22 SAS588 AGP → CPH May 22, 08:50 UTCMay 22, 12:00 UTC3h 10m
2026-05-22 SAS63Y CPH → AGP May 22, 04:05 UTCMay 22, 07:30 UTC3h 25m
2026-05-21 SAS88P DUB → CPH May 21, 18:25 UTCMay 21, 20:10 UTC1h 45m
2026-05-21 SAS85A CPH → DUB May 21, 15:20 UTCMay 21, 17:15 UTC1h 55m
2026-05-21 SAS92U MAD → CPH May 21, 11:25 UTCMay 21, 14:15 UTC2h 50m
2026-05-21 SAS581 CPH → MAD May 21, 07:00 UTCMay 21, 09:55 UTC2h 55m
2026-05-20 SAS560 CDG → CPH May 20, 18:30 UTCMay 20, 19:55 UTC1h 25m
2026-05-20 SAS73C CPH → CDG May 20, 15:35 UTCMay 20, 17:05 UTC1h 30m
2026-05-19 SAS2820 CHQ → CPH May 19, 19:05 UTCMay 19, 22:10 UTC3h 5m
2026-05-19 SAS82C ARN → SKG May 19, 14:30 UTCMay 19, 17:30 UTC3h 0m
2026-05-19 SAS2814 ALC → CPH May 19, 10:35 UTCMay 19, 13:25 UTC2h 50m
2026-05-19 SAS2813 CPH → ALC May 19, 06:00 UTCMay 19, 08:55 UTC2h 55m
2026-05-18 SAS49K LHR → CPH May 18, 18:55 UTCMay 18, 20:15 UTC1h 20m
2026-05-18 SAS1507 CPH → LHR May 18, 15:55 UTCMay 18, 17:20 UTC1h 25m
2026-05-18 SAS676 FRA → CPH May 18, 13:40 UTCMay 18, 14:45 UTC1h 5m
2026-05-18 SAS51H CPH → FRA May 18, 11:15 UTCMay 18, 12:20 UTC1h 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-SIO page for operator, model, and routing details .

Mode-S 4CAD42 frequently asked

What is Mode-S code 4CAD42?
4CAD42 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-SIO.
Where is Mode-S 4CAD42 registered?
Mode-S code 4CAD42 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAD42 broadcasting right now?
No active broadcast right now. Last signal was 43m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAD42, octal 23126502, decimal 5,025,090.
What flights does 4CAD42 operate?
Mode-S 4CAD42 has broadcast 20 distinct callsigns, including SAS88P, SAS85A, SAS92U, SAS581, SAS63Y.