serv4.nl-tech.ru has no CNAME records.
Question and response
Question
dig serv4.nl-tech.ru. NS
Answer
The response has no answer records.
Authority
nl-tech.ru. 3600 SOA serv1.nl-tech.ru. it-dep.nl-tech.ru. 2024042802 7200 3600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0