Public IP address via C#

Question

Hello,

Is there a way to read out the public IP address via C#?

[https://whatismyipaddress.com/]

Answer 1

It depends on the hosting webserver. With asp.net it’s Request.UserHostAddress, but if a load balancer is used it’s in a forwarded header HTTP_X_FORWARDED_FOR.

note: if you are trying to get the ipaddress from the computer itself, you must call out to a internet hosted webserver that returns the address.

Answer 2

A way :

using (HttpClient client = new HttpClient())
{
    string sIPAddress = await client.GetStringAsync("https://api.ipify.org");
    System.Diagnostics.Debug.WriteLine(sIPAddress);
}

Answer 3

Hi @Noah Aas , Welcome to Microsoft Q&A,

You can use C# to get the public IP address by calling a public API. For example, you can use HttpClient to request a service that provides a public IP address (for example, https://api.ipify.org?format=json)

  public static async Task<string> GetPublicIpAddress()
    {
        using (HttpClient client = new HttpClient())
        {
            try
            {
                // Request API to get public IP
                HttpResponseMessage response = await client.GetAsync("https://api.ipify.org?format=json");
                response.EnsureSuccessStatusCode();
                
                // Parse the returned JSON response
                string jsonResponse = await response.Content.ReadAsStringAsync();
                JObject jsonObject = JObject.Parse(jsonResponse);
                
                // Extract IP address
                return jsonObject["ip"].ToString();
            }
            catch (Exception ex)
            {
                Console.WriteLine("Error: " + ex.Message);
                return null;
            }
        }
    }

Best Regards,

Jiale

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