ns18.vodahost.com has no CNAME records.
Question and response
Question
dig ns18.vodahost.com. NS
Answer
The response has no answer records.
Authority
vodahost.com. 7322 SOA ns1.vodadns.com. serveradmin.vodahost.com. 2026012901 3600 1800 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0