How Can I Get My Router's Public IP Address Using C# or Command-Line Tools?

Accessing Your Router's Public IP Address

This guide outlines several methods for determining your router's public IP address, using both C# code and command-line interfaces.

C# Methods

• Utilizing HttpClient:

<code class="language-csharp">public static async Task<IPAddress> GetExternalIpAddress()
{
    string externalIpString = (await new HttpClient().GetStringAsync("http://icanhazip.com"))
        .Replace("\r\n", "").Replace("\n", "").Trim();
    if (!IPAddress.TryParse(externalIpString, out IPAddress ipAddress)) return null;
    return ipAddress;
}</code>

• Using WebClient (Deprecated):

<code class="language-csharp">public static void Main(string[] args)
{
    string externalIpString = new WebClient().DownloadString("http://icanhazip.com").Replace("\r\n", "").Replace("\n", "").Trim();
    IPAddress externalIp = IPAddress.Parse(externalIpString);

    Console.WriteLine(externalIp.ToString());
}</code>

Command-Line Approaches

• Linux and Windows Compatibility:

<code class="language-bash">wget -qO- http://bot.whatismyipaddress.com</code>

• Using Curl:

<code class="language-bash">curl http://ipinfo.io/ip</code>

These examples demonstrate diverse techniques for obtaining your router's public IP, offering both programmatic (C#) and command-line solutions.

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