Apex domains cannot have CNAME records.
Question and response
Question
dig starka.st. NS
Answer
starka.st. 5 NS dns4.fxs.se.
starka.st. 5 NS ns-global.kjsl.com.
starka.st. 5 NS dns-anycast.no-ack.net.
starka.st. 5 NS ns8.starka.st.
starka.st. 5 NS e.ns.buddyns.com.
starka.st. 5 NS puck.nether.net.
starka.st. 5 NS fns1.42.pl.
starka.st. 5 NS ns2.trifle.net.
starka.st. 5 NS ns1.linode.com.
starka.st. 5 NS ns1.1984.is.
starka.st. 5 NS dns5.fxs.se.
starka.st. 5 NS ns5.he.net.
starka.st. 5 NS orion.ns.nova53.net.
starka.st. 5 NS ns2.afraid.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0