Diploma mills: Who are they?

A cursory look at the website of this school shows:

1. No names of administrators or teachers.

2. No postal address.

3. No email address.

4. No telephone number.

And so on. I should mention, though, that there are some of these diploma mills that will give you some of this information; some fake and some real. In this case, it would be important to evaluate the site based on the entire list.