Go to www.nsiregistry.com and look on the right side. You can choose 'nameserver' instead of just domain name to get information on a registered NS. It can be a bit slow, but it works just fine.

The domain name system links the website addresses you type into your Web browser to the numeric IP addresses by which servers identify each other on the Internet. Domain names are easier for humans ...

You can find the hostname of any computer with a public IP address by passing the address to any Domain Name System (DNS) server. However, since the computers on a small business network have private ...