We check this website, now xfastest.com is up and dont blocked for our system and other users of the Internet.
So, answer to question: Is xfastest Down Right Now? - NO! xfastest is up!
If you have problem with access to site xfastest, and domain xfastest.com is not avalible.
Clear browser cache and/or try other web browser
(Chrome, Firefox or Safari).