Frequently Asked Questions

function Dot2LongIP ($IPaddr) {
	if ($IPaddr == "") {
		return 0;
	}
	else {
		$ips = explode(".", "$IPaddr");
		return ($ips[3] + $ips[2] * 256 + $ips[1] * 256 * 256 + $ips[0] * 256 * 256 * 256);
	}
}

long Dot2LongIP(String ipstring) {
	String[] ipAddressInArray = ipstring.split("\\.");
	long result = 0;
	long ip = 0;
	for (int x = 3; x >= 0; x--) {
		ip = Long.parseLong(ipAddressInArray[3 - x]);
		result |= ip << (x << 3);
	}
	return result;
}

<cfscript>
function Dot2LongIP(ipAddress) {
	if(arguments.ipAddress EQ "") {
		return 0;
	}
	else {
		ips = ListToArray( arguments.ipAddress, "." );
		return( ( 16777216 * ips[1] ) + ( 65536 * ips[2] ) + ( 256 * ips[3] ) + ips[4] );
	}
}
</cfscript>

public double Dot2LongIP(string DottedIP)
{
    int i;
    string [] arrDec;
    double num = 0;
    if (DottedIP == "")
    {
       return 0;
    }
    else
    {
       arrDec = DottedIP.Split(".");
       for(i = arrDec.Length - 1; i >= 0 ; i --)
       {
          num += ((int.Parse(arrDec[i])%256) * Math.Pow(256 ,(3 - i )));
       }
       return num;
    }
}

Public Function Dot2LongIP(ByVal DottedIP As String) As Double
    Dim arrDec() As String
    Dim i As Integer
    Dim intResult As Long
    If DottedIP = "" then
       Dot2LongIP = 0
    Else
       arrDec = DottedIP.Split(".")
       For i = arrDec.Length - 1 To 0 Step -1
          intResult = intResult + ((Int(arrDec(i)) Mod 256) * Math.Pow(256, 3 -i))
       Next
       Dot2LongIP = intResult
    End If
End Function

use Socket;

sub dot2LongIP {
	my $ip_address = shift(@_);
	return unpack("N",inet_aton($ip_address));
}

require 'ipaddr'

def dot2LongIP(ip)
	ipnum = IPAddr.new(ip)
	return ipnum.to_i
end

import ipaddress

def dot2LongIP(ip):
	return int(ipaddress.IPv4Address(ip))

uint32_t Dot2LongIP(char* ipstring)
{
	uint32_t ip = inet_addr(ipstring);
	uint8_t *ptr = (uint8_t *) &ip;
	uint32_t a = 0;

	if (ipstring != NULL) {
		a =  (uint8_t)(ptr[3]);
		a += (uint8_t)(ptr[2]) * 256;
		a += (uint8_t)(ptr[1]) * 256 * 256;
		a += (uint8_t)(ptr[0]) * 256 * 256 * 256;
	}
	return a;
}

CREATE FUNCTION Dot2LongIP (ip text)
RETURNS bigint
BEGIN
	DECLARE ipnum bigint;
	SET ipnum = (SELECT INET_ATON(ip));
	RETURN ipnum;
END

CREATE FUNCTION [dbo].[Dot2LongIP]( @IP VarChar(15) )
RETURNS BigInt
AS
BEGIN
   DECLARE @ipA BigInt,
         @ipB BigInt,
         @ipC BigInt,
         @ipD BigInt,
         @ipE BigInt
   SELECT @ipA = LEFT(@ip, PATINDEX('%.%', @ip) - 1 )
   SELECT @ip = RIGHT(@ip, LEN(@ip) - LEN(@ipA) - 1 )

   SELECT @ipB = LEFT(@ip, PATINDEX('%.%', @ip) - 1 )
   SELECT @ip = RIGHT(@ip, LEN(@ip) - LEN(@ipB) - 1 )

   SELECT @ipC = LEFT(@ip, PATINDEX('%.%', @ip) - 1 )
   SELECT @ip = RIGHT(@ip, LEN(@ip) - LEN(@ipC) - 1 )

   SELECT @ipD = @ip
   SELECT @ipE = ( @ipA * 256*256*256 ) + ( @ipB * 256*256 ) + ( @ipC * 256 ) + @ipD
   
   RETURN @ipE
END

CREATE OR REPLACE FUNCTION Dot2LongIP(text) RETURNS BIGINT AS '
SELECT
split_part($1,''.'',1)::int8*(256*256*256)+
split_part($1,''.'',2)::int8*(256*256)+
split_part($1,''.'',3)::int8*256+
split_part($1,''.'',4)::int8;'
LANGUAGE SQL;

Convert IPv4 IP Address to IP Number in Decimal Integer (IPv4 IP Address is in cell A1):
=((VALUE(LEFT(A1, FIND(".", A1)-1)))*256^3)+((VALUE(MID(A1, FIND(".", A1)+1, FIND(".", A1, FIND(".", A1)+1)-FIND(".", A1)-1)))*256^2)+((VALUE(MID(A1, FIND(".", A1, FIND(".", A1)+1)+1, FIND(".", A1, FIND(".", A1, FIND(".", A1)+1)+1)-FIND(".", A1, FIND(".", A1)+1)-1)))*256)+(VALUE(RIGHT(A1, LEN(A1)-FIND(".", A1, FIND(".", A1, FIND(".", A1)+1)+1))))

java.math.BigInteger Dot2LongIP(String ipv6) {
	java.net.InetAddress ia = java.net.InetAddress.getByName(ipv6);
	byte byteArr[] = ia.getAddress();

	if (ia instanceof java.net.Inet6Address) {
		java.math.BigInteger ipnumber = new java.math.BigInteger(1, byteArr);
		return ipnumber;
	}
}

<cfscript>
function Dot2LongIP(ipv6) {
	if (arguments.ipv6 eq "") {
		return 0;
	}
	else {
		IPV6Long = CreateObject("java","java.math.BigInteger");
		IPV6NetAddress = CreateObject("java","java.net.InetAddress");
		newIp = IPV6NetAddress.getByName(arguments.ipv6);
		bytes = newIp.getAddress();
		bigInt = IPV6Long.init(1, bytes).toString();
		return bigInt;
	}
}
</cfscript>

public System.Numerics.BigInteger Dot2LongIP(string ipv6)
{
	System.Net.IPAddress address;
	System.Numerics.BigInteger ipnum;

	if (System.Net.IPAddress.TryParse(ipv6, out address)) {
		byte[] addrBytes = address.GetAddressBytes();

		if (System.BitConverter.IsLittleEndian) {
			System.Collections.Generic.List<byte> byteList = new System.Collections.Generic.List<byte>(addrBytes);
			byteList.Reverse();
			addrBytes = byteList.ToArray();
		}

		if (addrBytes.Length > 8) {
			//IPv6
			ipnum = System.BitConverter.ToUInt64(addrBytes, 8);
			ipnum <<= 64;
			ipnum += System.BitConverter.ToUInt64(addrBytes, 0);
		} else {
			//IPv4
			ipnum = System.BitConverter.ToUInt32(addrBytes, 0);
		}
		return ipnum;
	}
}

Public Function Dot2LongIP(ByVal ipv6 As String) As System.Numerics.BigInteger
	Dim address As System.Net.IPAddress
	Dim ipnum As System.Numerics.BigInteger

	If System.Net.IPAddress.TryParse(ipv6, address) Then
		Dim addrBytes() As Byte = address.GetAddressBytes()

		If System.BitConverter.IsLittleEndian Then
			Dim byteList As New System.Collections.Generic.List(Of Byte)(addrBytes)
			byteList.Reverse()
			addrBytes = byteList.ToArray()
		End If

		If addrBytes.Length > 8 Then
			'IPv6
			ipnum = System.BitConverter.ToUInt64(addrBytes, 8)
			ipnum <<= 64
			ipnum += System.BitConverter.ToUInt64(addrBytes, 0)
		Else
			'IPv4
			ipnum = System.BitConverter.ToUInt32(addrBytes, 0)
		End If
	End If
	Dot2LongIP = ipnum
End Function

use NetAddr::IP;

sub dot2LongIP {
	my $ip_address = shift(@_);
	my $ip_number = NetAddr::IP->new($ip_address) or die;
	return $ip_number->bigint;
}

require 'ipaddr'

def dot2LongIP(ipv6)
	ipnum = IPAddr.new(ipv6)
	return ipnum.to_i
end

import ipaddress

def dot2LongIP(ipv6):
	return int(ipaddress.IPv6Address(ipv6))

#include <arpa/inet.h>
#include <inttypes.h>

typedef unsigned __int128 uint128_t;

uint128_t Dot2LongIP(const char* ipv6) {
	struct sockaddr_in6 sa;
	inet_pton(AF_INET6, ipv6, &(sa.sin6_addr));
	uint128_t ipnum = 0;
	uint128_t octet = 0;
	int i;
	for (i = 0; i < (sizeof(sa.sin6_addr.s6_addr) / sizeof(sa.sin6_addr.s6_addr[0])); i++) {
		octet = ((uint128_t)sa.sin6_addr.s6_addr[i] << ((uint128_t)(15 - i) * 8));
		ipnum = ipnum + octet;
	}
	return ipnum;
}