why subdomains dont have prefix www?

[kayajos]

why subdomains dont have prefix www?

www.example.com[correct]
www.example.example.com [wrong]
example.example.com [correct]

[edited by: engine at 3:04 pm (utc) on Mar 1, 2013]
[edit reason] examplified, See WebmasterWorld TOS [/edit]

[piatkow]

The www version is already a sub domain. It is purely a matter of custom and practice that hits on the www subdomain and hits on the domain itself go to the same location.

[topr8]

>>www.cool.example.com [wrong]

not true, many sites use www.example.example.com

and in any case there is no correct way to do it, as piatkow has mentioned it is convention that example.com resolves to the subdomain www.example.com however this is not a rule and it is not always the case.

[Dether]

Well i dont see a point of using www. prefix on Your domains, its not important at all

[HuskyPup]

Time Berners-Lee actually admitted that the www prefix was unnecessary and he only did it because it looked "cool", or something like that, and wished he had never done it.

[gpmgroup]

It helps people 'see' a web address especially in old media, new gtLDs will need a resurgence :)

[Kendo]

Well i dont see a point of using www. prefix on Your domains, its not important at all

It does have it's uses. Some cPanels used to use example.com as the mail domain and then use "www" for the website. One of the largest ISPs in Australia used to do this, managed from a home-grown cPanel.

Users couldn't access the site using example.com, but they could use www.example.com.

[lucy24]

If you've got software that auto-links, it may look for either of "begins with http" or "begins with www".

[bill]

I've said it before...www. is redundant [webmasterworld.com] and unnecessary, but if you're going to use it, do it correctly.