Apex domains cannot have CNAME records.
Question and response
Question
dig sasknet.sk.ca. NS
Answer
sasknet.sk.ca. 5 NS stuka.sasknet.sk.ca.
sasknet.sk.ca. 5 NS fulcrum.sasknet.sk.ca.
Authority
The response has no authority records.
Additional
stuka.sasknet.sk.ca. 5 A 162.219.55.2
fulcrum.sasknet.sk.ca. 5 A 162.219.54.2
stuka.sasknet.sk.ca. 5 AAAA 2620:10a:80ec:0:0:0:0:2
fulcrum.sasknet.sk.ca. 5 AAAA 2620:10a:80eb:0:0:0:0:2
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0