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IPNetwork command line and C# library take care of complex network, ip, netmask, cidr, subnet, subnetting, supernet and supernetting calculation for .Net developpers. It works with IPv4, it is written in C# and has a light and clean API and is fully unit tested.

Console application usage example

c:> ipnetwork 10.0.0.0/8

IPNetwork : 10.0.0.0/8
Network : 10.0.0.0
Netmask : 255.0.0.0
Cidr : 8
Broadcast : 10.255.255.255
FirstUsable : 10.0.0.1
LastUsable : 10.255.255.254
Usable : 16777214

Library usage example

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

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 : 192.168.168.0
Netmask : 255.255.255.0
Broadcast : 192.168.168.255
FirstUsable : 192.168.168.1
LastUsable : 192.168.168.254
Usable : 254
Cidr : 24