Apex domains cannot have CNAME records.
Question and response
Question
dig linktechs.net. NS
Answer
linktechs.net. 4 NS ns1.linktechs.net.
linktechs.net. 4 NS ns2.linktechs.net.
Authority
The response has no authority records.
Additional
ns1.linktechs.net. 4 A 139.60.210.20
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0