Попробуйте попасть в интернет-помощник:

У меня и сайт мтсовский перестал грузиться.

http://www.mts.ru/

Server Error
502 - Web server received an invalid response while acting as a gateway or proxy server.
There is a problem with the page you are looking for, and it cannot be displayed. When the Web server (while acting as a gateway or proxy) contacted the upstream content server, it received an invalid response from the content server.

Действия: