Also, you can do it via the web & email. Go to:
http://fedgov.dnb.com/webform/displayHomePage.do
You can select applicant if you may want to do work with the government. It will come via email.
Great Info, I went online and got my DUNS instantly they sent it directly to my email. The reps kept playing around trying to sell my the credit builder and kept saying my application was incomplete.