Apex CNAME Record

Checks that the apex domain name record (without the www) is an A record, and not a CNAME record.

A DNS query for the domain name without any subdomain (example.com not www.example.com) is called the apex or root record. It should have an 'A' record that specifies an IP address. It should not have a CNAME record as this can cause problems with queries for this domain.