If would like to know where you can check what DNS your site is currently using and/or to whom the domain is registered, simply do the following:
1. Go to https://secure.colosseum.com/clients/domainchecker.php
2. Enter your domain name in the text field at the top of the page.
3. Check the appropriate box for your TLD (eg. .ca, .com, etc...)
4. Click "Lookup".
5. Click on "WHOIS" under "More Info".
6. The results will show the DNS your site is using along with information about to whom your domain is registered.
NOTE: If you just recently made changes what is displayed might be old information.