Apex domains cannot have CNAME records.
Question and response
Question
dig managedns.ca. NS
Answer
managedns.ca. 5 NS ns2.managedns.ca.
managedns.ca. 5 NS ns12.kookiejar.net.
managedns.ca. 5 NS ns13.kookiejar.net.
managedns.ca. 5 NS ns1.managedns.ca.
Authority
The response has no authority records.
Additional
ns1.managedns.ca. 5 A 66.209.176.1
ns2.managedns.ca. 5 A 208.73.59.196
ns12.kookiejar.net. 5 A 208.73.59.196
ns13.kookiejar.net. 5 A 66.209.183.1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0