Maybe I will know where a good hosting is quality that websites are using them. I can have alternatives to the current web host.Why are you so curious with the things that are nothing to do with any thing .. and what are you going to by knowing this techniques. It looks like you are behind some one's website and trying to expose his hosting platform :music:
They will never tell you this info unless you are hosting your sites on their hosting servers.You must directly contact website owner and get information about there website was hosted on shared, vps or dedicated
There's no way to find out if a website is hosted on a bare metal dedicated box or a virtual platform, unless you have direct root/administrator access the the server. However, you can still do a reverse IP lookup to check if website has a dedicated IP or shares it with other websites.
Sample request: http://reverseip.domaintools.com/search/?q=forumweb.hosting
I think even it has some websites and a dedicated IP then it is hard to say its a shared or a dedicated server though.However, you can still do a reverse IP lookup to check if website has a dedicated IP or shares it with other websites.