All services you can check

A service that is not on the list

The pages above cover services that people check often enough to deserve their own notes on login trouble, apps and official help channels. Any other public website can still be checked: type its address, such as example.com, into the checker on the homepage and the same test runs from a server in your region.

Addresses that point at a private network, a bare IP address or an unusual port are refused on purpose, so office intranets and home devices cannot be tested from here.