Nameserver
The switch that decides who publishes your DNS list. Flip it only when you mean to.
What does Nameserver mean?
The server that publishes your DNS records to the rest of the internet. Changing nameservers hands that whole list to a different company.
Also called: name server, DNS host
One level above the individual records
Records say where the website and the mail go. Nameservers say which company is allowed to publish those records. If you edit a record at the registrar, you are writing on the list those nameservers serve. If you replace the nameservers, you throw that list away and start using another company's list.
Builder setups often ask you to replace the nameservers so the builder can control every record. That is convenient for them. It is dangerous if the old nameservers were also the only copy of your mail records.
A smaller edit is often enough
To launch a site you frequently only change the website address records and leave the nameservers where they are. Mail, verification lines, and odd extras stay put. Ask the person doing the launch which of the two jobs they intend.
If you must change nameservers, copy every record you still need onto the new list first. Then switch. Then send a test email from outside the company. The website grader can show whether MX, SPF, and DMARC records exist after the switch. It will not know if you forgot a record you needed.
How this feels in the account
The screen usually shows two or more hostnames, often ending in the registrar's or the host's domain. You do not type your website's address into that field. Owners do, and the name stops resolving. If the labels are unclear, stop and ask before saving.
We will tell you in plain language whether a launch needs a nameserver change or only a website record. The team replies within one business day. Bring a screenshot of the current nameservers to kickoff if the registrar screen confuses you.
An example
An auto repair shop's email ran through the same company that hosted an old one-page site. A new designer pasted their own nameservers over the top. The new site appeared, and appointment mail vanished. Restoring the mail meant copying MX lines onto the new nameservers, which nobody had written down.
Questions we get asked
Are nameservers the same as hosting?
No. Hosting stores the pages. Nameservers publish the directions to that hosting. One company can do both, which is why the invoice is a poor guide to which role broke.
Can I change nameservers back?
Yes, if you still know the previous ones and the records they held. The awkward case is when you do not. Write them down before the first edit. Treat that note as part of the business records, next to the registrar login.
