Apex domains cannot have CNAME records.
Question and response
Question
dig intelcom.sm. NS
Answer
intelcom.sm. 5 NS dns.omniway.sm.
intelcom.sm. 5 NS dns.intelcom.sm.
Authority
The response has no authority records.
Additional
dns.intelcom.sm. 5 A 194.183.64.11
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0