User blog comment:Icelilly/(IMPORTANT) Hetalia Archives has moved!/@comment-1431679-20110316031152/@comment-437707-20110316161248

The server is based Poland (I don't quite remember where the old server was located but I think it was in the US). They recently changed to the current server after Wikia users flooded their site and crashed it back in November. The company is based somewhere in Scandinavia with most of the global admins running the site are from Sweden and Finland.

There shouldn't be any restrictions. Most of the users who HA are from the US, Canada and some parts of Western Europe.