How to geolocate an IP using C# in .NET Framework

IP address geolocation can be crucial for many projects, useful for blocking potentially dangerous web traffic, providing shipping estimates, and gathering customer data, just to name a few. While setting up a geolocation function is by no means trivial, there is a much easier alternative that we will be looking at in today’s post: employing an API.

First, install the API client we will be using by running this command in the console of Package Manager:

Install-Package Cloudmersive.APIClient.NET.Validate -Version 1.2.7

Now we just have to call IPAddressPost:

using System;
using System.Diagnostics;
using Cloudmersive.APIClient.NET.Validate.Api;
using Cloudmersive.APIClient.NET.Validate.Client;
using Cloudmersive.APIClient.NET.Validate.Model;
namespace Example
{
    public class IPAddressPostExample
    {
        public void main()
        {
            // Configure API key authorization: Apikey
            Configuration.Default.AddApiKey("Apikey", "YOUR_API_KEY");
            // Uncomment below to setup prefix (e.g. Bearer) for API key, if needed
            // Configuration.Default.AddApiKeyPrefix("Apikey", "Bearer");
var apiInstance = new IPAddressApi();
            var value = value_example;  // string | IP address to geolocate, e.g. \"55.55.55.55\".  The input is a string so be sure to enclose it in double-quotes.
try
            {
                // Geolocate an IP address
                GeolocateResponse result = apiInstance.IPAddressPost(value);
                Debug.WriteLine(result);
            }
            catch (Exception e)
            {
                Debug.Print("Exception when calling IPAddressApi.IPAddressPost: " + e.Message );
            }
        }
    }
}

Let’s look at the output for this example IP address: 1.160.10.240

{
  "CountryCode": "TW",
  "CountryName": "Taiwan",
  "City": "Taipei",
  "RegionCode": "TPE",
  "RegionName": "Taipei City",
  "ZipCode": "",
  "TimezoneStandardName": "Asia/Taipei",
  "Latitude": 25.0478,
  "Longitude": 121.5318
}

As you can see, a lot of useful information is given about the IP address in question.