Hello just wondered if you can help me , im experimenting about setting a website up from home . I have not fully set it up ie with web pages but its showing on my external ip.

I want to make it so instead of the ip address in browser you can use a www. address. So i set up a sub domain destroyer.chickenkiller.com to try and a free dns updater .
I have opened ports 80 and port 53 .
I run the free dns updater it says its updated my ip 94.2.97.150 destroyer.chickenkiller.com

But it wont work on that domain from outside only on my ip 94.2.97.150
Any one know why ?