Apex domains cannot have CNAME records.
Question and response
Question
dig dsl.teksavvy.com. NS
Answer
dsl.teksavvy.com. 5 NS ns2.teksavvy.com.
dsl.teksavvy.com. 5 NS ns.teksavvy.com.
Authority
The response has no authority records.
Additional
ns.teksavvy.com. 5 A 206.248.182.3
ns2.teksavvy.com. 5 A 206.248.182.4
ns.teksavvy.com. 5 AAAA 2607:f2c0:0:0:0:0:0:3
ns2.teksavvy.com. 5 AAAA 2607:f2c0:0:0:0:0:0:4
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0