ns4.suomicom.com has no CNAME records.
Question and response
Question
dig ns4.suomicom.com. NS
Answer
The response has no answer records.
Authority
suomicom.com. 3417 SOA ns1.suomicom.fi. domains.suomicom.fi. 1764170863 28800 3600 864000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0