You can get it with almost any web server...
PHP: echo $REMOTE_ADDR;
here's a javascript that you'd use on Geocities, from "javascript source (googled)":
<SCRIPT LANGUAGE="JavaScript">
// Depending on your server set-up,
// you may need to use the ".shtml"
// extension [instead of the "html"
// or "htm"] as the script uses Server
// Side Includes. To display in the
// title bar, exclude the
//"<title></title>" code from the page.
// This part gets the IP
var ip = '';
// This part is for an alert box
alert("Your IP address is "+ip);
// This part is for the status bar
window.defaultStatus = "Your IP address is "+ip;
// This part is for the title bar
document.write("<title>Your IP address is "+ip+"</title>");
// End -->
</script>
but yeah, definetly possible
