Apex domains cannot have CNAME records.
Question and response
Question
dig omniway.sm. NS
Answer
omniway.sm. 2 NS dns.omniway.sm.
omniway.sm. 2 NS dns.intelcom.sm.
Authority
The response has no authority records.
Additional
dns.omniway.sm. 2 A 194.183.64.10
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0