You can check your DNS records on dnsstuff.com by doing the following:
- Go to http://www.dnsstuff.com/
- Look for the box labeled DNS lookup and put the domain you wish to check in the box.
- After that, select the type of record you wish to check (For example: A, MX, NS, SOA, etc.).
- Click on the Lookup button.
- On the next page you will see the results.
You can also check your DNS records using "DiG" on *NIX systems, or you can check them using "nslookup" on Windows systems.