Partial Service Disruption
October 21, 2016 4:44PM UTC
[Identified] Since ~8:52 PDT the external DNS service which twitter uses is once again seeing problems affecting multiple internet services, including twitter.com.
October 21, 2016 9:09PM UTC
[Resolved] As of 13:25, the significant attacks hindering the external DNS provider have been mitigated by them.
Twitter should once again be available to all users.
Engineers continue to investigate the root causes and mitigation strategies.