How to register co.za South Africa’s Top Level domain via Uniform coza Registry. Please note: co.za Domain Names need rDNS to be setup correctly before you can register this TLD from the registry. Please ask your Data Center to setup rDNS/PTR records for you. co.za Domain Name Registration, South Africa Domain Name Registration CO.ZA. In this example we make use of WHM/cpanel to setup the domain on the Dedicated server prior to registration.