cprapid.com is the automatically generated DNS Zone and nameservers on Cpanel installations. It allows Cpanel to issue an SSL certificate for the WHM installation, so you can access WHM without receiving an SSL error.
When you first log into WHM we recommend that you replace cprapid.com with a domain name that you own and are not using elsewhere.
To change your server's hostname after you log into WHM click:
HOME>NETWORKING SETUP>CHANGE HOSTNAME
