IPv6 engineering toolkit

IPv6 Subnet Calculator

Calculate subnet ranges within an established /64. The supported /65–/128 scope is intentional.

Calculation input

IPv6 address

Calculate by

Prefix length Enter a prefix from /65 through /128. Number of subnets Enter how many subnets are required. Addresses per subnet Enter the required node or address capacity.

Calculation value The calculator selects the corresponding IPv6 prefix.

Subnet list Abbreviated: first 10, containing subnet ±2, last 10 Complete list when 65,536 rows or fewer