ns2.lyse.net has no CNAME records.
Question and response
Question
dig ns2.lyse.net. NS
Answer
The response has no answer records.
Authority
lyse.net. 1319 SOA ns1.altibox.net. root.lyse.net. 2020121424 28800 7200 2419200 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0