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DNS basics for site owners.
DNS sounds technical, but a few ideas cover most of what a site owner needs.
The main records
- A record: points your domain to the server that holds your website.
- CNAME: makes one name an alias of another.
- MX record: tells the world where your email should be delivered.
- TXT record: used for checks such as SPF and site verification.
Nameservers
Nameservers decide where your DNS records are managed. Changing them moves the whole set of records to a new place, so copy your existing records first.
Why changes take time
DNS answers are stored for a while by different networks. Because of this, a change may reach some visitors before others. Wait and test again before making a second change.