Apex domains cannot have CNAME records.
Question and response
Question
dig tricom.net. NS
Answer
tricom.net. 2 NS ns1.tricom.net.
tricom.net. 2 NS ns4.tricom.net.
tricom.net. 2 NS ns3.tricom.net.
tricom.net. 2 NS ns2.tricom.net.
Authority
The response has no authority records.
Additional
ns1.tricom.net. 2 A 200.42.213.11
ns2.tricom.net. 2 A 200.42.213.21
ns3.tricom.net. 2 A 190.94.0.5
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0