Apex domains cannot have CNAME records.
Question and response
Question
dig fromdoppler.com. NS
Answer
fromdoppler.com. 2 NS margot.ns.cloudflare.com.
fromdoppler.com. 2 NS peter.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0