How to tell if WordPress is hosted on WP servers or not?

Hey guys,

How can I determine if a WordPress blog is being hosted on a company’s own webhost server, or if it is hosted on WordPress’s server? The company’s blog’s address is www.company.com/blog, so it isn’t on the WordPress domain. Does this mean it is being hosted with that company’s webhost, as opposed to WordPress’s servers?

Also, I clicked a picture in one of the blog entries and it brought me to http://company.com/blog/wp-content/uploads/2010/06/pic.jpg … Is this another sign that it is indeed hosted on that company’s own webhost server?

100%?

Thanks a lot guys