Huh? As of at least 2017 GitHub was running their own data centers [1]. Any evidence that’s changed? Microsoft bought them in 2018, I can’t imagine they went to AWS after that.
Ah sorry, yeah I wasn't being very accurate.
I was checking "what's on Azure", I didn't really follow up to check in detail the breakdown of the rest. I just saw quite a bit on AWS and assumed it all was.