URL Not being Resolved

I have received over a dozen e-mails yesterday advertising a website called 
buldoser.info, or a derivative. Each time, spamcop reports the url cannot be 
resolved, but the website pops right up in my browser.

What is going on?

Cannot resolve http://buldoser.info/al/022/
Cannot resolve http://buldoser.info/al/024/

I apologize for listing the actual site name if that is not allowed or 
discouraged. I'm sure someone will point out my faux pax if that is the 
case.