Installing and Administering Internet Services

Chapter 3 69
Configuring and Administering the BIND Name Service
Creating and Registering a New Domain
Do not use nic or other well known acronyms as leftmost (most
specific) labels in a name. Contact Government Systems, Inc., for a
list of top-level and second-level domain names already in use.
3. After you have registered your domain, you can create subdomains
without registering them with the public network.