Sure, that means Twitter probably uses Okta for corporate SSO (as do many companies), but nothing more. Okta offers white-labeling on your own domain (and some

Sure, that means Twitter probably uses Okta for corporate SSO (as do many companies), but nothing more. Okta offers white-labeling on your own domain (and some advanced Okta features are only available via white-labeling), so twitter.biz is probably their corporate domain. (that's noc @ twitter.com, by the way, the RNAME is an email address where you replace the leftmost dot with an @.) Be careful with "that subdomain", though -- beeflourishing.okta.com also resolves, they've probably got a wildcard DNS entry and definitely have a wildcard SSL cert there. None of that is evidence of this thing.