To the best of my knowledge- the 3 credit reporting agencies are
www.equifax.com, www.transunion.com, and
www.experian.com.
The last time I requested a copy of my report, it cost something like $8 each to get a copy from them. However, they also used to give you one for free if you had recently been refused credit. I don't know if they still do that, though. Check out those websites for more information.