IPv6 Subnet Calculator 1.1 by Rhys Koedijk Networking with Cisco – Online web IPv4 and IPv6 IP subnet Calculator Bitcricket is mostly an IPv4 subnet tool but has a few IPv6 features.

IP Subnet Calculator (free) is a good, basic subnet calculator that shows available subnets based on IP class.

The Bitcricket IP Subnet Calculator from Wildpackets runs natively on both Windows and Mac OS X. It calculates subnets automatically, the company says, presenting bit-by-bit address visualization ...

Study tips There is the ubiquitous subnet chart that lists all the sizes, start addresses, slash notations, and wildcard notations. Do not rote memorize that chart. Instead, be able to derive that ...