YES!! You can!!
You can even file disputes online ... though I've been told oodles of times that if you do so, they can add an extra 15 days to the investigation duration.
Anywho, you can go to TrueCredit.com or FreeCreditReport.com ... if you've not obtained your CRs free in the past year, you can pull them TODAY for free (it's a Federal law that you can)!!
And please remember to save or print a copy ... sometimes, CAs can be tricky and re-age accounts (so they don't fall off your CRs when they're supposed to).
If you really, really, really, want to clean up your credit, pulling your "real" credit reports is the best way to do it. You'll not only see who's reporting you, but also the account numbers and contact info!!
Best, best of luck!!