+ 0 Votes @janstan10 govind_avinashraj May 23, 2013 at 5:38am PST If the subnet mask is changed from 255.255.255.0 to 255.255.248.0, you will definitely increase the range. However you have mentioned that all existing users have static IP. In that case you would have to change the mask in every machine which will be a lot of work. Maybe you should start segregating the users and create multiple vlans. IP addresses can be static/dynamic.