ops.ubivox.com has no CNAME records.
Question and response
Question
dig ops.ubivox.com. NS
Answer
The response has no answer records.
Authority
ubivox.com. 283 SOA ns1.curanet.dk. hostmaster.curanet.dk. 2026022301 14400 3600 1209600 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0