DNS里的A和CNAME records

Differences between the A and CNAME records

The A record points a name to a specific IP.

blog.dnsimple.com.     A        185.31.17.133

The CNAME record points a name to another name, instead of an IP. The CNAME source represents an alias …

blog.dnsimple.com.      CNAME   aetrion.github.io.