We check this website, now drcorp.sharepoint.com is up and dont blocked for our system and other users of the Internet.
So, answer to question: Is drcorp Down Right Now? - NO! drcorp is up!
If you have problem with access to site drcorp, and domain drcorp.sharepoint.com is not avalible.
Clear browser cache and/or try other web browser
(Chrome, Firefox or Safari).