Discard Name Record For Free

First, you should always delete stale DNS records. If you stop controlling the resource your domain name points to, you should remove the record.

What does flush DNS do? Flushing DNS will clear any IP addresses or other DNS records from your cache. This can help resolve security, internet connectivity, and other issues. It's important to understand that your DNS cache will clear itself out from time to time without your intervention.

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A CNAME is an alias record. It means, for example, that somesite.com can also be accessed by going to . So if you were to delete that CNAME record, and someone tried to reach it by going to the www address, they'd be unable to reach it, because there's no record there. That's all.

Delete a DNS record from your domain that's no longer needed. Deleting records will completely remove them from your zone file. Changes to your DNS may interrupt how your domain works, such as your email and website.

Right-click the selected records, and then click Delete DNS resource record. The Delete DNS Resource Record dialog box opens. Verify that the correct DNS server is selected. If it is not, click DNS server and select the server from which you want to delete the resource records.

When you first delete the A record it will take a while for it to be removed from all caching DNS servers. This means that you will continue to get the A records answer for a while, once it expires then the CNAME will start being used.