Subnet Calculator for IP Addresses and Subnetting ONLINE!
IP Routing on Subnets
Some old Python code for a Network calculator from when I started programming. Not terrible, but every other line reeks of inexperience and lack of foresight. : r/programminghorror
Network mask calculator - Mr.Opart
Show IP Protocols: Revised post: Covering Subnet Calculator to understand more about Wildcard Mask
IP Subnet Calculator | IPTP Networks
CIDR Subnet Mask Cheat Sheet | NetworkProGuide
Guide to Subnet Mask (Subnetting) & IP Subnet Calculator