ns2.optron.lv has no CNAME records.
Question and response
Question
dig ns2.optron.lv. NS
Answer
The response has no answer records.
Authority
optron.lv. 4027 SOA ns1.optron.lv. noc.rent.net. 2021072802 3600 1200 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0