Convert IPv6 Address to IP numbers (C#)

URL: http://lite.ip2location.com/

Use the code below to convert the IP address of your web visitors and lookup for their geographical location, e.g. country, state, city, latitude/longitude, ZIPs, timezone and so on. Free database can be downloaded at http://lite.ip2location.com.

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/// <summary>
/// Convert IPV6 Address to IP Number
/// Free geolocation database can be downloaded at:
/// http://lite.ip2location.com/
/// </summary>
string strIP = "2404:6800:4001:805::1006";
System.Net.IPAddress address;
System.Numerics.BigInteger ipnum;
if (System.Net.IPAddress.TryParse(strIP, 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);
}
}

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Convert IPv6 Address to IP numbers (C#)

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