6connect ar Twitter: "Our IPv6 Subnet Calculator can be used to work within your IP block range and estimate the structure of your IPv6 allocation. Or you can just generate CSV files
IP Subnet Calculator for IPv4 and IPv6 - Free download and software reviews - CNET Download
12 Best Free Online IPv6 Subnet Calculator Websites
IPv4 Subnet Calculator Console Version - TerrorFlatRider
5 Free IP Subnet Calculator Software
IPv6 Subnet Calculator | Colin Robinson
12 Best Free Online IPv6 Subnet Calculator Websites