I don't think they block sites by location? I found out that after I logon NameRenters, I couldn't view my sites saying my IP is blocked. You could probably use a different IP and do not logon NameRenters, see if you could view your site.
Another thing I notice is their add domain window is buggy. If I add the domains line by line in bulk, all domains are added but only the last domain (domain3.com) is tracked. Seems like they added the <Return> character to the domains and screwed up.
domain1.com<Return>
domain2.com<Return>
domain3.com
So at last I added 100 domains one by one :upset:. I only notice this very recently, don't know if it has to do with my browser. You could test if this affects you by adding two identical domains, see if it comes up twice.
domain1.com<Return>
domain1.com