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