IPNetwork

IPNetwork command line and C# library take care of complex network, IP, IPv4, IPv6, netmask, CIDR, subnet, subnetting, supernet, and supernetting calculation for .NET developers. It works with IPv4 as well as IPv6, is written in C#, has a light and clean API, and is fully unit-tested.

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IPNetwork utility classes for .Net

IPNetwork utility classes take care of complex network, IP, IPv4, IPv6, netmask, CIDR, subnet, subnetting, supernet, and supernetting calculation for .NET developers. It works with IPv4 as well as IPv6, is written in C#, has a light and clean API, and is fully unit-tested with 100% code coverage.

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Installation

PM> nuget install IPNetwork2

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Example 1 (IPv4)

IPNetwork2 ipnetwork = IPNetwork2.Parse("192.168.168.100/24");

Console.WriteLine("Network : {0}", ipnetwork.Network);
Console.WriteLine("Cidr : {0}", ipnetwork.Cidr);
Console.WriteLine("Netmask : {0}", ipnetwork.Netmask);
Console.WriteLine("Broadcast : {0}", ipnetwork.Broadcast);

Console.WriteLine("FirstUsable : {0}", ipnetwork.FirstUsable);
Console.WriteLine("LastUsable : {0}", ipnetwork.LastUsable);
Console.WriteLine("Usable : {0}", ipnetwork.Usable);

Console.WriteLine("First : {0}", ipnetwork.First);
Console.WriteLine("Last : {0}", ipnetwork.Last);
Console.WriteLine("Total : {0}", ipnetwork.Total);

Output

Network : 192.168.168.0
Cidr : 24
Netmask : 255.255.255.0
Broadcast : 192.168.168.255

FirstUsable : 192.168.168.1
LastUsable : 192.168.168.254
Usable : 254

First : 192.168.168.0
Last : 192.168.168.255
Total : 256

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Example 2 (IPv6)

IPNetwork2 ipnetwork = IPNetwork2.Parse("2001:0db8::/64");

Console.WriteLine("Network : {0}", ipnetwork.Network);
Console.WriteLine("Netmask : {0}", ipnetwork.Netmask);
Console.WriteLine("Broadcast : {0}", ipnetwork.Broadcast);
Console.WriteLine("FirstUsable : {0}", ipnetwork.FirstUsable);
Console.WriteLine("LastUsable : {0}", ipnetwork.LastUsable);
Console.WriteLine("Usable : {0}", ipnetwork.Usable);
Console.WriteLine("Cidr : {0}", ipnetwork.Cidr);

Output

Network : 2001:db8::
Netmask : ffff:ffff:ffff:ffff::
Broadcast :
FirstUsable : 2001:db8::
LastUsable : 2001:db8::ffff:ffff:ffff:ffff
Usable : 18446744073709551616
Cidr : 64

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Example 3 (IPv6)

IPNetwork2 ipnetwork = IPNetwork2.Parse("2001:0db8::/64");

IPAddress ipaddress = IPAddress.Parse("2001:0db8::1");
IPAddress ipaddress2 = IPAddress.Parse("2001:0db9::1");

IPNetwork2 ipnetwork2 = IPNetwork2.Parse("2001:0db8::1/128");
IPNetwork2 ipnetwork3 = IPNetwork2.Parse("2001:0db9::1/64");

bool contains1 = ipnetwork.Contains(ipaddress);
bool contains2 = ipnetwork.Contains(ipaddress2);
bool contains3 = ipnetwork.Contains(ipnetwork2);
bool contains4 = ipnetwork.Contains(ipnetwork3);

bool overlap1 = ipnetwork.Overlap(ipnetwork2);
bool overlap2 = ipnetwork.Overlap(ipnetwork3);

Console.WriteLine("{0} contains {1} : {2}", ipnetwork, ipaddress, contains1);
Console.WriteLine("{0} contains {1} : {2}", ipnetwork, ipaddress2, contains2);
Console.WriteLine("{0} contains {1} : {2}", ipnetwork, ipnetwork2, contains3);
Console.WriteLine("{0} contains {1} : {2}", ipnetwork, ipnetwork3, contains4);


Console.WriteLine("{0} overlap {1} : {2}", ipnetwork, ipnetwork2, overlap1);
Console.WriteLine("{0} overlap {1} : {2}", ipnetwork, ipnetwork3, overlap2);

Output

2001:db8::/64 contains 2001:db8::1 : True
2001:db8::/64 contains 2001:db9::1 : False
2001:db8::/64 contains 2001:db8::1/128 : True
2001:db8::/64 contains 2001:db9::/64 : False
2001:db8::/64 overlap 2001:db8::1/128 : True
2001:db8::/64 overlap 2001:db9::/64 : False

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Example 4 (IPv6)

IPNetwork2 wholeInternet = IPNetwork2.Parse("::/0");
byte newCidr = 2;
IPNetworkCollection subneted = wholeInternet.Subnet(newCidr);

Console.WriteLine("{0} was subnetted into {1} subnets", wholeInternet, subneted.Count);
Console.WriteLine("First: {0}", subneted[0]);
Console.WriteLine("Last : {0}", subneted[subneted.Count - 1]);
Console.WriteLine("All  :");

foreach (IPNetwork2 ipnetwork in subneted) {
    Console.WriteLine("{0}", ipnetwork);
}

Output

::/0 was subnetted into 4 subnets
First: ::/2
Last : c000::/2
All  :
::/2
4000::/2
8000::/2
c000::/2

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Example 5 (IPv6)

IPNetwork2 ipnetwork1 = IPNetwork2.Parse("2001:0db8::/32");
IPNetwork2 ipnetwork2 = IPNetwork2.Parse("2001:0db9::/32");
IPNetwork2[] ipnetwork3 = IPNetwork2.Supernet(new[] { ipnetwork1, ipnetwork2 });

Console.WriteLine("{0} + {1} = {2}", ipnetwork1, ipnetwork2, ipnetwork3[0]);

Output

2001:db8::/32 + 2001:db9::/32 = 2001:db8::/31

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Example 6

IPNetwork2 ipnetwork = IPNetwork2.Parse("192.168.0.0/24");
IPAddress ipaddress = IPAddress.Parse("192.168.0.100");
IPAddress ipaddress2 = IPAddress.Parse("192.168.1.100");

IPNetwork2 ipnetwork2 = IPNetwork2.Parse("192.168.0.128/25");
IPNetwork2 ipnetwork3 = IPNetwork2.Parse("192.168.1.1/24");

bool contains1 = ipnetwork.Contains(ipaddress);
bool contains2 = ipnetwork.Contains(ipaddress2);
bool contains3 = ipnetwork.Contains(ipnetwork2);
bool contains4 = ipnetwork.Contains(ipnetwork3);

bool overlap1 = ipnetwork.Overlap(ipnetwork2);
bool overlap2 = ipnetwork.Overlap(ipnetwork3);

Console.WriteLine("{0} contains {1} : {2}", ipnetwork, ipaddress, contains1);
Console.WriteLine("{0} contains {1} : {2}", ipnetwork, ipaddress2, contains2);
Console.WriteLine("{0} contains {1} : {2}", ipnetwork, ipnetwork2, contains3);
Console.WriteLine("{0} contains {1} : {2}", ipnetwork, ipnetwork3, contains4);

Console.WriteLine("{0} overlap {1} : {2}", ipnetwork, ipnetwork2, overlap1);
Console.WriteLine("{0} overlap {1} : {2}", ipnetwork, ipnetwork3, overlap2); A

Output

192.168.0.0/24 contains 192.168.0.100 : True
192.168.0.0/24 contains 192.168.1.100 : False
192.168.0.0/24 contains 192.168.0.128/25 : True
192.168.0.0/24 contains 192.168.1.0/24 : False
192.168.0.0/24 overlap 192.168.0.128/25 : True
192.168.0.0/24 overlap 192.168.1.0/24 : False

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Example 7

IPNetwork2 iana_a_block = IPNetwork2.IANA_ABLK_RESERVED1;
IPNetwork2 iana_b_block = IPNetwork2.IANA_BBLK_RESERVED1;
IPNetwork2 iana_c_block = IPNetwork2.IANA_CBLK_RESERVED1;

Console.WriteLine("IANA_ABLK_RESERVED1 is {0}", iana_a_block);
Console.WriteLine("IANA_BBLK_RESERVED1 is {0}", iana_b_block);
Console.WriteLine("IANA_CBLK_RESERVED1 is {0}", iana_c_block);

Output

IANA_ABLK_RESERVED1 is 10.0.0.0/8
IANA_BBLK_RESERVED1 is 172.16.0.0/12
IANA_CBLK_RESERVED1 is 192.168.0.0/16

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Example 8

IPNetwork2 wholeInternet = IPNetwor