Is this really true? Because I have wondered quite a few times. Is www.foo.bar just a subdomain like irc.foo.bar or mail.foo.bar? Is the default www.somesite.co

Is this really true? Because I have wondered quite a few times. Is www.foo.bar just a subdomain like irc.foo.bar or mail.foo.bar? Is the default www.somesite.com basically just convention?