<?php
$dbhost = "localhost";
$dbuser = "";
$dbpass = "";
$dbname = "";

mysql_connect($dbhost,$dbuser,$dbpass);
mysql_select_db($dbname);
mysql_query('SET NAMES utf8'); 

$ip = 'ВАШ IP!';

$query = "SELECT country_name FROM ip WHERE INET_ATON('{$ip}') BETWEEN start_ip_num AND end_ip_num LIMIT 1";

$res = mysql_query($query);
$row = mysql_fetch_row($res);

print_r($row);
?>