Apex domains cannot have CNAME records.
Question and response
Question
dig socialbuzzonline.com. NS
Answer
socialbuzzonline.com. 5 NS ns1.socialbuzzonline.com.
socialbuzzonline.com. 5 NS ns2.socialbuzzonline.com.
Authority
The response has no authority records.
Additional
ns1.socialbuzzonline.com. 5 A 213.32.19.237
ns2.socialbuzzonline.com. 5 A 5.135.117.221
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0