For those using our name servers, you may find this information in myCP click on Domains (in the left side bar menu) -> Domain List. From there click the link for the specific domain name whois information you wish to view, and the relevant information will be found on the next screen.
For those not using our DNS service or with other account setups, you may perform a WHOIS or dig against your domain name if using a Unix/Linux server, or you may perform a WHOIS search at Network Solutions or another online Whois search provider against your domain name to get this information. If you can not determine the DNS provider for your domain or there is any other DNS related problem that you can not figure out or resolve, please log into myCP and open a ticket.