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