ns.granderiver.com has no CNAME records.
Question and response
Question
dig ns.granderiver.com. NS
Answer
The response has no answer records.
Authority
granderiver.com. 443 SOA nsb.vtx1.net. fieldopadmin.vtx1.net. 54 10800 3600 2419200 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0