Monitoring: Services have been restored to normal as of 13:20 UTC. Posted about 1 hour ago. Oct 21, 2016 - 13:36 UTC
Update : This attack is mainly impacting US East and is impacting Managed DNS customers in this region. Our Engineers are continuing to work on mitigating this issue. Posted about 2 hours ago. Oct 21, 2016 - 12:45 UTC
Investigating: Starting at 11:10 UTC on October 21st-Friday 2016 we began monitoring and mitigating a DDoS attack against our Dyn Managed DNS infrastructure. Some customers may experience increased DNS query latency and delayed zone propagation during this time. Updates will be posted as information becomes available.
This is "probably why half the internet is shut down today," reports Gizmodo, which offers the following list of sites that were down for the count.
ActBlue, Basecamp, Big cartel, Box, Business Insider, CNN, Cleveland.com, Esty, Github, Grubhub, Guardian.co.uk, HBO Now, Iheart.com (iHeartRadio), Imgur, Intercom, Intercom.com, Okta, PayPal, People.com, Pinterest, Playstation Network, Recode, Reddit, Spotify, Squarespace Customer Sites, Starbucks rewards/gift cards, Storify.com, The Verge, Twillo, Twitter, Urbandictionary.com (lol), Weebly, Wired.com, Wix Customer Sites, Yammer, Yelp, Zendesk.com, Zoho CRM,