DNS, Nameservers and Caching
Updated 2 July 2026
DNS translates domain names into IP addresses. When you update DNS, cached results on routers and ISPs may serve old values until they expire.
This article explains key concepts and practical context so you can make informed decisions for your WordPress site.
Common record types
- A record: points a hostname to an IPv4 address.
- AAAA record: points to an IPv6 address.
- CNAME: aliases one hostname to another.
- MX: routes email to your mail server.
- TXT: used for verification, SPF, and DKIM.
If your site shows the wrong server after a move, flush local DNS cache or wait for TTL expiry before assuming the change failed.