PSA: GitHub Pages IP addresses have been updated

tl;dr: New IP Addresses for your DNS are now: 192.30.252.153 and 192.30.252.154

Fastly error: unknown domain: www.example.com. Please check that this domain has been added to a service.

If you’re seeing this error message as of August 22nd, 2016 on a previously working GitHub Pages domain, you need to update the IP Addresses according to this article: https://help.github.com/articles/setting-up-an-apex-domain/

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