To Create and Register Your Domain Hosts in Parallels Plesk Panel

Log in to Parallels Plesk Panel as an administrator.
Go to the Websites & Domains tab, and then click DNS Settings.
For the row with the Record Type of NS, click your domain name, change the following, and then click OK:
Record type — NS.
Domain Name — Leave this field.
Name server — Type ns1.coolexample.com, where coolexample.com is your domain name.
For the row with the Host of ns.coolexample.com, where coolexample.com is your domain, click it, change the following, and then click OK:
Record type — A.
Domain Name — Type ns1.
IP Address — Enter your server’s IP address.
Click Add Record, complete the following fields, and then click OK:
Record type — Select NS.
Domain Name — Leave this field blank.
Name server — Enter ns2.coolexample.com, where coolexample.com is your domain name.
Click Add Record, complete the following fields, and then click OK:
Record type — Select A.
Domain Name — Type ns2.
IP Address — Enter your server’s IP address
Click Update.
Go to the Server tab in Plesk, and then, from the Server Management section, click Services Management.
Next to DNS Server (BIND), click Refresh. Allow a few minutes for the service to restart.