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