s2.ns.dp.ua has no CNAME records.
Question and response
Question
dig s2.ns.dp.ua. NS
Answer
The response has no answer records.
Authority
dp.ua. 1200 SOA ns.dp.ua. hostmaster.dp.ua. 2026030909 1800 480 1209600 1200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0