Apex domains cannot have CNAME records.
Question and response
Question
dig kolbsystems.net. NS
Answer
kolbsystems.net. 1 NS tia.ns.cloudflare.com.
kolbsystems.net. 1 NS dean.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
tia.ns.cloudflare.com. 2 A 108.162.192.229
tia.ns.cloudflare.com. 2 A 172.64.32.229
tia.ns.cloudflare.com. 2 A 173.245.58.229
dean.ns.cloudflare.com. 2 A 108.162.193.153
dean.ns.cloudflare.com. 2 A 172.64.33.153
dean.ns.cloudflare.com. 2 A 173.245.59.153
tia.ns.cloudflare.com. 2 AAAA 2606:4700:50:0:0:0:adf5:3ae5
tia.ns.cloudflare.com. 2 AAAA 2803:f800:50:0:0:0:6ca2:c0e5
tia.ns.cloudflare.com. 2 AAAA 2a06:98c1:50:0:0:0:ac40:20e5
dean.ns.cloudflare.com. 2 AAAA 2606:4700:58:0:0:0:adf5:3b99
dean.ns.cloudflare.com. 2 AAAA 2803:f800:50:0:0:0:6ca2:c199
dean.ns.cloudflare.com. 2 AAAA 2a06:98c1:50:0:0:0:ac40:2199
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0