x.site
x.website
x.blog
x.wiki
x.co
x.io
x.app
x.forum
x.us
x.at
x.nz
x.be
x.cl
x.si
x.ею
x.ua
x.рф
x.co.us
x.se

.forum

Learn more about .forum at IANA or Wikipedia, or view all top-level domains.