Apex domains cannot have CNAME records.
Question and response
Question
dig ha-vel.com. NS
Answer
ha-vel.com. 5 NS ns3.ha-vel.com.
ha-vel.com. 5 NS ns.ha-vel.cz.
ha-vel.com. 5 NS ns2.ha-vel.cz.
Authority
The response has no authority records.
Additional
ns.ha-vel.cz. 5 A 81.30.225.10
ns2.ha-vel.cz. 5 A 81.30.231.20
ns3.ha-vel.com. 5 A 46.105.29.243
ns.ha-vel.cz. 5 AAAA 2a02:570:820:0:0:0:0:3
ns2.ha-vel.cz. 5 AAAA 2a02:570:20:0:0:0:0:3
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0