The IP to Country Database

I have written the following PHP code to get the Location from the ip-to-country.csv file:
<?php
$ip = $_SERVER['REMOTE_ADDR'];
$ip_long = ip2long($ip);
$country = 'unkown' ;

$fl = fopen("ip-to-country.csv", "r") ;
if (!$fl) {
die("Error") ;
} else {
while ( !feof($fl) ) {
$line = fgets($fl);

list($start_ip, $end_ip, $letter_2_code, $letter_3_code, $full_name) = explode(",", $line) ;
$start_ip = str_replace("\"", "", $start_ip) ;
$end_ip = str_replace("\"", "", $end_ip) ;
$letter_2_code = strtolower(str_replace("\"", "", $letter_2_code)) ;
$letter_3_code = strtolower(str_replace("\"", "", $letter_3_code)) ;
$full_name = str_replace("\"", "", $full_name) ;
if ($ip_long >= $start_ip && $ip_long <= $end_ip) {
$country = $full_name ;
break ;
}
}
fclose($fl) ;
}
if ( $country <> 'unknown' ) {
$two_three = $letter_2_code . "-" . $letter_3_code ;
if ( file_exists("nation_flags/$letter_2_code.gif") ) {
$img_flag = '<img src="nation_flags/' . $letter_2_code . '.gif" border="0">' ;
} else if ( file_exists("nation_flags/$letter_3_code.gif") ) {
$img_flag = '<img src="nation_flags/' . $letter_3_code . '.gif" border="0">' ;
} else if ( file_exists("nation_flags/$two_three.gif") ) { $img_flag = '<img src="nation_flags/' . $two_three . '.gif" border="0">' ;
} else {
$img_flag = '' ;
}
print '<table width="100%" cellspacing="0" cellpadding="0" border="0" class="textinfo">';
print '<tr>';
print '<td width="100%" align="center"><strong>Your IP Address : </strong>' . $ip . '</td>';
print '</td>';
print '</tr>';
print '<tr>';
print '<td width="100%" align="center"><strong>Your Location : </strong>' . $country . '</td>';
print '</tr>';
print '<tr>';
print '<td width="100%" align="center">' . $img_flag . '</td>';print '</tr>';
print '</tr>';
print '</table>';
}
?>
When this code is accessed from the IP: 210.86.148.140, its showing Location as United States and Flag of US. Is there any problem with the code or the IP? Whats the actual problem? Can anyone please help me out?