IPv6SubnetCalc

IPv6SubnetCalc is a network utility that gives you the possibility to calculate IP addresses with the IPv6 format based on the network's address.

It features support for RFC4291, RFC3849, RFC4193, RFC3879, RFC3056, RFC2464, RFC3956, RFC5375, RFC4941, RFC3306, RFC2374, RFC3513 and RFC3587.

Since the tool was developed in Java, you must have the Java Runtime Environment installed. Other than that, IPv6SubnetCalc doesn't have to be installed, so you can just double-click the .jar executable file to deploy the app. It doesn't add new entries to the system registry or generate other files on the computer.

As far as the interface is concerned, the IPv6 subnet calculator adopts a Java Swing GUI, showing a default address and mask to give you an idea of how it works.

Besides changing the address, you can pick the prefix mask from a range from /1 to /64. It's possible to allow the mask to be larger than 64, 120 or 127 bits, as well as to take into account mEUI-64 (Modified Extended Unique Identifier - 64) in /54 networks.

Calculations are performed by clicking the button with a graphical representation of the binary code. Apart from a popup message that shows the bits in IPv6 mode, you can check out network details with the address type, network ID, first and last usable address, along with the number of usable addresses.

The subnet calculator shows the predefined router anycast address, first and second reserved anycast addresses, number of subnets, as well as MAC addresses (decode like RFC2464). Unfortunately, there are no options implemented for copying all data to the clipboard, saving it to file, or printing it.

All things considered, IPv6SubnetCalc proves to be a user-friendly application for helping you calculate IPv6 subnet addresses.