By the way, I don't know about phone numbers, but I am pretty sure many if not all states provide addresses of sex offenders. One place I found with info is here
You are correct, my brother is deservedly on the Missouri list. In that state they list name, address past and current, employer past and current, and identifiable marks. Most states, if not all, have these sites. I believe there's also a federal registry that gives similar information. I am not sure how countries other than the US deal with these issues.