dns02.mediaocean.com has no CNAME records.
Question and response
Question
dig dns02.mediaocean.com. NS
Answer
The response has no answer records.
Authority
mediaocean.com. 1800 SOA dns01.donovandata.com. domainadmin.mediaocean.com. 2026030201 28800 3600 1209600 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0