Checking whois is similar to this one, but Whoishostingthis is a website that lets you know where the website is hosted, and also does let you know whether the host is trustable or not.
Sometimes, your blog is being copied by someone, and you have no option to contact that site owner who is copying the content. You would just go to contact their host to solve the issue, and let them remove the content or suspend the hosting, as any reliable host would do the same and do not like their clients copying content from other places.
But what if the host is not reliable, and promotes such kind of things. This site lets you know whether the host is reliable or not. They have many reviews in their site, and with this ratings and reviews, the reliability of a host is measured.
Here is an example – My directory nobledirectory.com is checked here.
It is hosted at HostGator as what is shows, and when you check the reviews of Hostgator, you would know how good or bad it is.
A worth mentioning tool, as whois data is rather confusing than this, and this site has straight-forward answer to your question – Who is hosting this site!
Check it out at whoishostingthis.com

Honestly, this is the one I used to know what webhosting a certain blog is using.
Hrmm it’s a shame that some hosting services aren’t very trustworthy. That’s an interesting tool and much better than whois.
A useful tool.
Hopefully I won’t need to use it due to people copying content!
Hi, I cant understand how to add your site in my rss reader. Can you Help me, please