Title: Fully qualified domain names (FQDN)
Author: WordPress VIP Documentation
Published: September 1, 2021
Last modified: October 16, 2025

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 1. [Domains](https://docs.wpvip.com/domains/)
 2. Fully qualified domain names (FQDN)

#  Fully qualified domain names (FQDN)

The [fully qualified domain name](https://developer.mozilla.org/en-US/docs/Glossary/Domain)(
FQDN) for a site on the VIP Platform can be either the `www` or non-`www` variant
of the domain.

For [WordPress single site](https://docs.wpvip.com/wordpress-single-site/) environments:

 * If the FQDN [added to an environment’s Domains panel](https://docs.wpvip.com/map-a-domain/)
   is the `www` variant, the site will be reachable at `www.domain.com` and requests
   to `domain.com` will automatically redirect to `www.domain.com`.
 * If the FQDN added to an environment’s Domains panel is the non-`www` variant,
   the site will be reachable at `domain.com` and requests to `www.domain.com` will
   automatically redirect to `domain.com`.

For [WordPress multisite](https://docs.wpvip.com/wordpress-multisite/) environments:

 * Redirects between the `www` or non-`www` variants of a domain do not occur automatically.
   These [redirects must be set up in the `vip-config.php` file](https://docs.wpvip.com/redirects/domain-redirects-in-vip-config-php/).

For [Node.js environments](https://docs.wpvip.com/node-js/):

 * Redirects between the `www` or non-`www` variants of a domain do not occur automatically
   and must be configured in the application code.

Last updated: October 16, 2025