We have various servers and printers configured with static IPs in this subnet. I'm currently handing out IPs via DHCP from 100-200, but I only have maybe 10 free, plus I'd like to add more servers ...
tl/dr: Here is a nice chart for you! I created the below chart a few years ago to post up for reference some of my coworkers would forget what our subnet mask was suppose to be. It didn't really work ...