<?php
$NETMASK = array(
    1 => "128.0.0.0",
    2 => "192.0.0.0",
    3 => "224.0.0.0",
    4 => "240.0.0.0",
    5 => "248.0.0.0",
    6 => "252.0.0.0",
    7 => "254.0.0.0",
    8 => "255.0.0.0",
    9 => "255.128.0.0",
    10 => "255.192.0.0",
    11 => "255.224.0.0",
    12 => "255.240.0.0",
    13 => "255.248.0.0",
    14 => "255.252.0.0",
    15 => "255.254.0.0",
    16 => "255.255.0.0",
    17 => "255.255.128.0",
    18 => "255.255.192.0",
    19 => "255.255.224.0",
    20 => "255.255.240.0",
    21 => "255.255.248.0",
    22 => "255.255.252.0",
    23 => "255.255.254.0",
    24 => "255.255.255.0",
    25 => "255.255.255.128",
    26 => "255.255.255.192",
    27 => "255.255.255.224",
    28 => "255.255.255.240",
    29 => "255.255.255.248",
    30 => "255.255.255.252",
    31 => "255.255.255.254",
    32 => "255.255.255.255"
);
?>