Apex domains cannot have CNAME records.
Question and response
Question
dig ofsend.com. NS
Answer
ofsend.com. 3 NS ns-227.awsdns-28.com.
ofsend.com. 3 NS ns-740.awsdns-28.net.
ofsend.com. 3 NS ns-1099.awsdns-09.org.
ofsend.com. 3 NS ns-2021.awsdns-60.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0