ns.fibertelecom.com has no CNAME records.
Question and response
Question
dig ns.fibertelecom.com. NS
Answer
The response has no answer records.
Authority
fibertelecom.com. 3600 SOA ns.fibertelecom.com. noc.fibertelecom.it. 2025122020 7200 1800 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0