LanCalculator - to calculate subnet addresses and masks LanCalculator makes possible not only to easily calculate the subnet addresses range and subnet masks but also broadcast address, net address, net prefix and net mask inversion which is used in the access control lists (ACL) of Cisco network equipment. One key press is enough to calculate all parameters after net address and mask were entered. To complete the picture additional display is given in binary, decimal and hexadecimal scale. LanCalculator to calculate masks and addresses is as easy as pie now!