Apex domains cannot have CNAME records.
Question and response
Question
dig dns.business. NS
Answer
dns.business. 3 NS ns1.dns.business.
dns.business. 3 NS ns4.dns.business.
dns.business. 3 NS ns3.dns.business.
dns.business. 3 NS ns2us.dns.business.
Authority
The response has no authority records.
Additional
ns1.dns.business. 3 A 157.90.205.138
ns3.dns.business. 3 A 206.223.136.200
ns4.dns.business. 3 A 194.146.106.74
ns2us.dns.business. 3 A 147.135.106.236
ns1.dns.business. 3 AAAA 2a01:4f8:252:4295:0:0:9d5a:cd8a
ns3.dns.business. 3 AAAA 2001:43f8:30:0:0:0:0:200
ns4.dns.business. 3 AAAA 2001:67c:1010:18:0:0:0:53
ns2us.dns.business. 3 AAAA 2604:2dc0:200:2eb:0:0:0:2
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0