clientIP-geolocation.html

<script type="javascript" runat="server">
Platform.Load("core","1"); 

var ip = Platform.Request.ClientIP(); 
var apiKey = '' //insert apiKey obtained from https://geo.ipify.org/subscriptions
var url = 'https://geo.ipify.org/api/v1?apiKey=';
var response = HTTP.Get(url + apiKey + ip);

Write("response.Status: " + response.Status + '<br />');
Write("response.Content: " + response.Content);
</script>