DNS Records Explained for Business Owners

DNS sounds technical, and it is — but the core idea is simple. It is the system that turns a domain name people can remember into the numerical addresses that computers actually use. Without it, nobody could find your site by typing your name.

You do not need to be an expert, but understanding the main DNS records helps when you change host, set up email, or troubleshoot a problem. Here is the plain-English version.

What DNS does

When someone types your domain into a browser, their computer asks the DNS system where to find your site. DNS replies with the address of the server hosting it, and the page loads. The same system routes your email to the right place.

Your DNS records live with whoever manages your domain — often your registrar or host. Changing them is how you point a domain at a new website or email provider, which is why they matter so much during a migration.

The records you will meet

An A record points your domain to the server hosting your website. A CNAME record points one name at another, often used for subdomains like www. MX records direct your email to the right mail server.

TXT records hold text-based information, and these days they do a lot of heavy lifting for email security — SPF, DKIM, and DMARC all live in TXT records and help prove your emails are genuine. Get these wrong and your email may end up in spam folders.

Why it matters and where care is needed

DNS changes are powerful and not always instant. After an edit, the change has to propagate across the internet, which can take anywhere from minutes to a couple of days. This is worth knowing so you do not panic when a change does not appear straight away.

Because DNS controls both your website and your email, a mistake can take both offline at once. It pays to make changes carefully, keep a record of your settings before editing, and lean on a developer for anything you are unsure about.