# interger to I P address

bfeeny at mac.com bfeeny at mac.com
Wed Aug 27 11:47:13 CDT 2008

```The NANOG way: www.google.com

------Original Message------
From: Boyd, Benjamin R
To: Andree Toonk
To: nanog at nanog.org
Sent: Aug 27, 2008 12:38 PM
Subject: RE: interger to I P address

>>> The harder way:
>>>
>>> Decimal: 1089055123
>>> Hex (dashes inserted at octals): 40-E9-A9-93 Decimal (of
>each octet):
>>> 64-233-169-147 IP Address: 64.233.169.147
>>
>> The Python way
>>
>> >>> import socket, struct
>> >>> socket.inet_ntoa(struct.pack('>l', 1089055123))
>> '64.233.169.147'
>
>The Perl way:
>
>sub ntoa
>{
>    my \$one = shift;
>    my \$four = \$one & 0xff;
>    \$one >>= 8;
>    my \$three = \$one & 0xff;
>    \$one >>= 8;
>    my \$two = \$one & 0xff;
>    \$one >>= 8;
>    return "\$one.\$two.\$three.\$four";
>}
>
>#or in one line, like ipcalc does:
>sub ntoa_in_one_line { join(".", unpack("CCCC", pack("N", \$_[0]))); }
>
>print ntoa(1089055123) . "\n";
>print ntoa_in_one_line(1089055123) . "\n";
>
>

The PHP way:
function convertIntegerToIpv4(\$integer)
{
\$max_value = pow(2,32);           //4,294,967,296
\$bug_fix = 0;
settype(\$integer, float);

if(\$integer > 2147483647) \$bug_fix = 16777216;

if(is_numeric(\$integer))
{
if (\$integer >= \$max_value || \$integer < 0)
{
return ('Not a valid IPv4 integer');
}
\$ip = (sprintf("%u.%u.%u.%u",
\$integer / 16777216,
((\$integer % 16777216) + \$bug_fix) / 65536,
((\$integer % 65536) + \$bug_fix / 256) / 256,
(\$integer % 256) + \$bug_fix / 256 / 256
)
);
return(\$ip);
}
else {
return('');
}
}

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```

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