Apex domains cannot have CNAME records.
Question and response
Question
dig doubletreeclubohare.com. NS
Answer
doubletreeclubohare.com. 5 NS ns2.doubletreeclubohare.com.
doubletreeclubohare.com. 5 NS ns1.doubletreeclubohare.com.
Authority
The response has no authority records.
Additional
ns1.doubletreeclubohare.com. 5 A 173.252.193.170
ns2.doubletreeclubohare.com. 5 A 173.252.193.174
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0