How it works
When you type a domain into a browser, your device asks a DNS resolver where that domain lives. The resolver checks the domain's records and returns the right server address, usually in a fraction of a second, and the browser connects to it.
Common record types
An A record points a domain to an IPv4 address, and an AAAA record to an IPv6 address. A CNAME points one name to another. MX records tell email where to go, and TXT records hold verification codes and email security settings.
Where DNS is managed
DNS records live with a DNS provider, which is often your domain registrar, your host or a service like Cloudflare. When you move hosts or set up email, you or your developer update these records.
Why DNS matters
If DNS is wrong, your website or email simply stops working, even if everything else is fine. Correct records also matter for email deliverability and for verifying tools like Google Search Console.
The email that stopped after a redesign
A firm moved its website to a new host and replaced its DNS records, but forgot the MX records for email. Messages started bouncing until the old email records were added back. A quick DNS checklist would have prevented it.
Common mistakes
Changing records without a backup
Before editing DNS, copy the current records so you can restore anything that breaks.
Expecting instant changes
Updates can take anywhere from minutes to a day or two to spread, depending on settings. Plan changes for quiet times.
Forgetting email security records
SPF, DKIM and DMARC records help your emails reach inboxes. Missing ones can send messages to spam.
Where we work on this