[CotopaXi]

Level 3/CenturyLink har problem för tillfället

tl;dr One of the large Internet backbone providers (formerly known as Level3, but now known as CenturyLink usually) that many ISPs use is down. Expect issues connecting to portions of the Internet.
Usually the Internet is a bit more resilient to these kinds of things, but there are complicating factors with this outage making it worse.

Expect it to mostly be resolved today. These things have happened a bit more frequently, but generally average up to a couple times a year historically.

https://news.ycombinator.com/item?id=24322861