HttpContext.Current.Request.Url.Host what it returns?

Yes, as long as the url you type into the browser www.someshopping.com and you aren't using url rewriting then

string currentURL = HttpContext.Current.Request.Url.Host;

will return www.someshopping.com

Note the difference between a local debugging environment and a production environment

c# asp.net http httpcontext

The Host property will return the domain name you used when accessing the site. So, in your development environment, since you're requesting

http://localhost:950/m/pages/Searchresults.aspx?search=knife&filter=kitchen

It's returning localhost. You can break apart your URL like so:

Protocol: httpHost: localhostPort: 950PathAndQuery: /m/pages/SearchResults.aspx?search=knight&filter=kitchen

c# asp.net http httpcontext

Try this:

string callbackurl = Request.Url.Host != "localhost"     ? Request.Url.Host : Request.Url.Authority;

This will work for local as well as production environment. Because the local uses url with port no that is possible using Url.Host.

CodeHunter