Register multiple domains
RackNap Altair’s Bulk domain registration lets us search multiple domains at once. Just enter your list of domains separated by a comma or space. You can choose to either type the extensions yourself or make a selection from the display list and press the search button to see the real-time availability status of the all the domain names you entered at once.
Enter up to 50 domain names.
Each name must be on a separate line.

Examples:
example.com
example.net