Found this in a news article:
Several cyber attacks disrupted Web traffic on the East Coast Friday, shutting down access to some of the Web’s most popular sites and frustrating their users.
A slew of major sites including Twitter, Netflix, and Spotify were affected by what was described as a DDoS, or a distributed denial of service attack, on the Internet services company Dyn.
Sites taken down by the DDoS attack today:
• Shopify + more
UPDATE: Woooohooooo! MY Twitter is back, hopefully for good! And I hope the rest of you have access, too. Today’s 12 hour outage (for me) brought home how very, very important the internet is to what I do. I won’t forget it, believe me.