Here are the sequence of emails we as a customer received: 1:44PM PST - The Neustar UltraDNS service is currently experiencing DDoS traffic in the U.S. East Region. The Security Operations Team is currently working on mitigating attack traffic and further updates will be provided as soon as possible. 3:07PM PST - The Neustar UltraDNS service is currently experiencing a major spike in traffic across several regions. T…
The data from the outage is all here:
https://blog.thousandeyes.com/ultradns-outage-october-2015/
Check it out.