Apex domains cannot have CNAME records.
Question and response
Question
dig thinktel.ca. NS
Answer
thinktel.ca. 5 NS ns2.distributel.net.
thinktel.ca. 5 NS ns1.distributel.net.
Authority
The response has no authority records.
Additional
ns1.distributel.net. 5 A 209.197.128.10
ns2.distributel.net. 5 A 209.197.128.20
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0