Sub domain "www" not showing up on sub domain url

Question

I have created sub domain as example.domain.com on godaddy but when I put url as www.example.subdomain.com it throws me an error

This webpage is not available
ERR_NAME_NOT_RESOLVED

but when I use as http://example.subdomain.com it works. Why is this so?

Answer 1

You have to handle the sub-domains example.subdomain.com and www.example.subdomain.com as if they were two completely different sub-domains.

Fun fact: It's even possible to create sub-domains like "this.is.my.crazy.subdomain.com"!