DNS_PROBE_FINISHED_NXDOMAIN Azure web app - dns

Question

I've just created a new website via azure's web app. I've done this several times before and never had a problem but now for some reason the site's DNS won't resolve!? Not even the custom domain but azure's own subdomain won't even resolve and the IP address 404's leading me to think this is an azure problem and nothing to do with my google DNS configuration for my custom domain I'm trying to setup. (golftipsters.com)
I even tried deleting and recreating the web app and app service. Got a new IP address but still the same problem. I deployed the site via continuous integration from bitbucket but even before that there should be some kind of placeholder?
https://www.golftipsters.azurewebsites.net/
http://20.40.202.16/
What's going on!?
It says my deployment is successful and active
Update:
After some trial an error creating new web apps. I've discovered that it's when I deploy my code via CI from bitbucket that this issue occurs. How could my code deployment cause the DNS to fail? Is it even the DNS then??

Answer 1

So it turns out the problem was in the codebase I was trying to deploy. I had this code in the global.asax.cs that was trying to force www. and this was causing the DNS error.
if (!Request.Url.Host.StartsWith("www") && !Request.Url.IsLoopback)
{
UriBuilder builder = new UriBuilder(Request.Url);
builder.Host = "www." + Request.Url.Host;
Response.StatusCode = 301;
Response.AddHeader("Location", builder.ToString());
Response.End();
}