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

Sending magic packets and performing IP address operations.

Arcus, developed by Sandia National Laboratories, is a C# library for calculating, parsing, formatting, converting and comparing both IPv4 and IPv6 addresses and subnets. It accounts for 128-bit numbers on 32-bit platforms.

This program scans your subnets

High Performance C# Subnetting

RUST is a general-purpose computer tool coded in C# with the .NET Framework.

An Intuitive and easy to use Subnet Calculator written in C#.

A console application that parses an input list of networks and finds networks that are a subnet of another network in the list, allowing you to remove them as redundant.

BroadcastRelay relays local broadcast traffic across subnets

Console application to calculate the subnets and connecting networks of a network IPv4 open source