networking - Is there a subnet calculator that computes the *complement* of a subnet? - Stack Overflow
IP Subnet Calculator
Download Subnet Calculator 1.3
How to calculate a subnet mask from hosts and subnets | TechTarget
How to find the maximum and minimum IP addresses connected to a network if, for example, the given IP address is 201.23.14.0/30 - Quora
IP Calculator / IP Subnetting
Introduction to Subnetting - How to Calculate Subnets, CIDR, VLSM!
Subnetting and Subnet Masks Explained
Software & Windows Solutions - Subnet and IP Calculator One of the most important tools in the belt of a junior network engineer is an IP network calculator. These can be used
Subnet Calculator for IP Addresses and Subnetting ONLINE!
Linux: IP Subnet (CIDR) Calculator That Will Help You With Network Settings - nixCraft