Subdomains are treated as separate site of the main domain as far as the search engines are considered. I had a discussion on same few months back as well. Now when we search in google with site:sitename, why does pages under subdomain also shows up in the result? In that case subdomains arent treated as seperate site and considered a part of main site.....
I have the same question, but I guess the answer is not easy. I did some tests and from my understanding it is treated sometimes as separate site and sometimes as a folder. How SE are making their decisions, this is a question. I still didn’t figure out this, but if I’ll get something I’ll post it here.
well i have a site thats is indexed by google. And i created a subdomain and it is still not included in google. My points is i believe google consider subdomains as different sites.
All you have to do is to add the www. Because www is a subdomain, it eliminates others from showing up.
well few months back i had a discussion here - http://forums.digitalpoint.com/showthread.php?t=139529 It was basically about unethical promotion via subdomain, for example i have a domain health.com, now to use the advantage of it i create a subdomain car-manufacturers.health.com. Now obviously the sub-domain is not anywhere related to main domain. It was concluded in that thread that its not unethical as google treats sub-domain as seperate site. Now if google treats subdomains as seperate site why does it shows subdomain pages in results of site: command for main domain....
google does treat subs as seperate sites but don't forget that the subs also contain the domain name in their url so they will most likely appear on the first pages too