Article Helpful for quickly seeing the broadcast address, number of hosts, if an IP address is link-local or not. I wonder how this can work with SDN. You do have to import it to your version of Python. #of hosts in a range. I wanted to see if it knew to move onto the next octet when over the 255 limit; It's all outlaid in the linked article, not much for me to explain. Just a neat tool I wanted to share (and bookmark). Because, in the real world, your employer doesn't care how you subnet, just that you do.