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Asked: 2026-05-20T00:12:59+00:00

Please correct me if i am wrong. There are two types of IP –

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Please correct me if i am wrong. There are two types of IP –
One, the static(fixed) IP address we assign to the LAN card and second that we received from the service provider.

For ex. The IP address set for my machine is 192.168.1.10 while the IP address given by ISP is 218.64.xx.xx. (You can check this using http://www.ip2location.com/)

When I use ASP.net, i can get the IP address provided by ISP using –
HttpContext.Current.Request.UserHostAddress;

The Problem:
Now, I am working in Windows Forms environment but unable to get the IP provided by ISP, though I am able to get the fixed IP.

Can anybody help me?

Thanks for sharing your time.

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1 Answer

  1. Editorial Team

    You’re trying to get the external IP address of your router.

    You need to send an HTTP request to a third-party service which will reply with the IP address.

    You can do that using the WebClient class.

    For example:

    ///<summary>Gets the computer's external IP address from the internet.</summary>
static IPAddress GetExternalAddress() {
    //<html><head><title>Current IP Check</title></head><body>Current IP Address: 129.98.193.226</body></html>
    var html = new WebClient().DownloadString("http://checkip.dyndns.com/");

    var ipStart = html.IndexOf(": ", StringComparison.OrdinalIgnoreCase) + 2;
    return IPAddress.Parse(html.Substring(ipStart, html.IndexOf("</", ipStart, StringComparison.OrdinalIgnoreCase) - ipStart));
}
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