Visitor API has built-in provider to find visitor's location based on their IP Address.

To configure the IP2Location Database, you need add the following code to the Startup.cs file in your Web API application.

public void ConfigureServices(IServiceCollection services)
{
    // ...     
    services.ConfigureVisitor(builder =>
    {
        builder.UseIp2Location(*ip2LocationConnectionString*);
    });
}

As shown in the code above, Visitor API requires a ConnectionString to the Ip2Location database. It works with ip-country-region-city-latitude-longitude-zipcode-timezone database and MS SQL server. You can easily set up the database by following their instructions.