GitHub employee here. We're monitoring an incident with our upstream DNS provider:
maybe post a github gist? oh wait...
Maybe you should have more than one. Then I could actually carry out my work...
(Alias for https://status.github.com, via https://octostatus-9676240.us-east-1.elb.amazonaws.com )
199.16.156.70 twitter.com
104.244.43.231 abs.twimg.com
104.244.43.231 pbs.twimg.com
192.30.253.113 github.com
151.101.24.133 assets-cdn.github.com
[edit: twitter and github are both accessible again.]