Apex domains cannot have CNAME records.
Question and response
Question
dig webaddress.host. NS
Answer
webaddress.host. 2 NS ns1.zonomi.com.
webaddress.host. 2 NS ns6.zonomi.com.
Authority
The response has no authority records.
Additional
ns1.zonomi.com. 4 A 45.79.211.52
ns6.zonomi.com. 4 A 172.105.209.133
ns1.zonomi.com. 4 AAAA 2600:3c02:0:0:f03c:91ff:fe26:5def
ns6.zonomi.com. 4 AAAA 2400:8902:0:0:f03c:91ff:fe46:a4ed
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0