SOME FAMOUS WEBSITE WHICH ARE MADE OR RUNNING ON SUB DOMAIN :

• www.godaddy.com | www.in.godaddy.com
• www.hubspot.com | www.blog.hubspot.com
• www.wikipedia.com |www.en.m.wikipedia.com 
• www.indeed.com | www.ca.indeed.com
• www.amazon.com | www.aws.amazon.com 
• www.youtube.com | www.m.youtube.com
• www.wix.com | www.support.wix.com
• www.facebook.com | www.m.facebook.com
• www.dreamhost.com | www.help.dreamhost.com