https://downdetector.com/
Many websites are affected.
A back-bone of the Internet infrastructure comes from LEVEL 3.
https://en.wikipedia.org/wiki/Level_3_Communications
Working:
https://twitter.com/breaking9111
https://twitter.com/B911Alternate
https://breaking911.com/
>>3865657 (Bread #4914)
Yesterday they did a TEST. Page is gone today.
https://twitter.com/Breaking9ll/status/1061978966884532225