If you are a retail customer, you can use the secure login form at centralnic.com. Click the link below..
CentralNic Managed DNS Service
The CentralNic Managed DNS Service allows CentralNic's direct retail customers to manage the configuration of their domain names without the burden of operating their own DNS servers. You can set up A records for your websites, and any number of sub-domains, as well as MX records for e-mail, and SPF records to help fight spam.
The Managed DNS Service is closely integrated with the Account Manager system - you will need to log in as the Technical Contact for a domain name before you can set it up to use the service. If you register a new domain name with us, you will be given the choice of using the service when you register.
The Managed DNS Service uses a robust network infrastructure that propagates real-time updates to our network of DNS servers. Our system takes all of the effort out of using your domain names - all you need to do is create your website and set up your mail server.
And best, of all, use of the service is completely free!
Click here to see the Terms and Conditions for the Managed DNS Service.