CIDR/Mask and Machines/Subnet LUTs

The CIDR/Mask table displays the possible subnets for each mask and the maximum number of machines per subnet a the CIDR for the three classes of networks A, B and C. The CIDR starts from 9-31 for Class A, 17 to 31 for Class B, and 25 to 31 for Class C.

For more information see the following link: https://www.iotools.net/network/subnet-calculator. This site contains an online subnet IP calculator and a table for converting CIDR/Mask to binary. The IP calculator also allows the conversion of IP addresses to binary and hexadecimal.