Network - (Internet) Apex Domain (also known as Zone domain)


An apex domain is the domain name that:

For example: is an apex domain.

Apex domains are also known as:

  • base,
  • bare,
  • naked,
  • root
  • apex,
  • Origin
  • registered
  • domain apex
  • second level domain name

This is not the same concept than the LDAP distinguished name (DN)


The main usage is to qualify relative name and makes them unique on an internet scope

The apex domain name can be found in:



To buy an apex domain, you should contact a registrar.


An apex domain is configured with one of the following DNS record:

If you're configuring the apex domain, you should also configure up the www subdomain.


Documentation / Reference

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