Realistically, it is gone as most/all issues are quoted on the OTCLink now---the advantages are an electronic marketplace and elimination of MM fees...
the OTCBB.com went away last November--and all data migrated here:
on the above link---select "directories" from the left menu and then check the OTCBB box in the next column to the right---you will get around 458 issues on the OTCBB---put those tickers into OTCMarkets and you will see OTCQB or Pink Current...