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