Yes, I stand corrected.  There was a time when your USDOT registration showed you as intrastate only, the inspection was not done.  That has changed, probaby as someone said above, after 9/11/2001; every "new entrant" earns the inspection.

http://www.fmcsa.dot.gov/registration-licensing/registration-USDOT.htm

I gave a link above which I believe may lead to these if you hit the right link but there is a lot to wade through.  Here are a couple that I hope are helpful to anyone seeking information:

http://www.fmcsa.dot.gov/registration-licensing/online-registration/onlineregdescription.htm

http://safer.fmcsa.dot.gov/