175-45-91-0.core.vocus.network has no CNAME records.
Question and response
Question
dig 175-45-91-0.core.vocus.network. NS
Answer
The response has no answer records.
Authority
vocus.network. 10800 SOA ns1.vocus.network. root.vocus.network. 2026022701 10800 3600 604800 86420
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0