2 years for hard inquiries (when you apply for credit) and 12 months (I think) for soft inquiries (like when you get pre-approvals and requesting your own report). Hope this helps.
Wow, I didn't know that it was one year for AR's etc. I have many listed on all my reports that are reaching two years, as well as hard inquiries so I assumed that it was two for them as well. Can I contact the CRA's and have them removed?
Kat, You probably could do a dispute as obsolete, but why? AR's are not hurting you. They are just account reviews, and only you see them. That is a soft inquiry.