Apex domains cannot have CNAME records.
Question and response
Question
dig indiansummerhomes.com. NS
Answer
indiansummerhomes.com. 5 NS ns2.indiansummerhomes.com.
indiansummerhomes.com. 5 NS ns1.indiansummerhomes.com.
Authority
The response has no authority records.
Additional
ns1.indiansummerhomes.com. 5 A 5.135.118.101
ns2.indiansummerhomes.com. 5 A 5.135.118.102
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0