About acquiring an IP computer to get accurate IP for getting an inaccurate phone

To do a query identification system, the goods need to be queried with the IP and the direction of the cargo to match. The problem is that it is accurate to use a computer to test IP access. I know the IP is randomly assigned, but Unicom is Unicom Telecom is telecommunications, network segment or fixed in a range.

But I use the mobile phone to access to obtain IP when actually appeared unicom mobile phone display network segment of telecommunications. It's a tangle. End With string ip = request.servervariables["http_x_forwarded_for"]; To get the agent's IP. But this gets

It's a big risk. Baidu Introduction Very detailed

/string IP = Request.ServerVariables.Get ("REMOTE_ADDR");
string ip = System.Web.HttpContext.Current.Request.UserHostAddress;

string ip = request.servervariables["http_x_forwarded_for"];

About acquiring an IP computer to get accurate IP for getting an inaccurate phone