SubnetCalculate
$ipv6-calc 2001:db8::/64

IPv6 Subnet Calculator

Enter an IPv6 address with a prefix length to calculate the network address, address range, and subnet size for any IPv6 block. Get expanded and compressed forms, total address count, and prefix boundaries — everything you need for IPv6 network planning and address allocation. The cidr calculator handles any prefix from /0 to /32 and returns all derived subnet values alongside binary representation.

Input

/
Common prefixes:

IPv6 Subnet Details

Network Address
-
Full IPv6 Address
-
Prefix Length
-
Network Bits
-
Host Bits
-
Address Type
-
Address Scope
-

Address Range

First Address
-
Last Address
-
Total Addresses
-

Related Network Tools

Explore these related tools for subnet calculation and IP address management.

Additional networking calculators for IP address planning and network analysis. Run the free subnet calculator to convert a CIDR block into every derived subnet parameter without installing any software.

More tools to support network design, addressing, and subnet troubleshooting. The ipv6 range calculator outputs the first and last address in any IPv6 prefix and the total number of addresses in the block.

Comments & Feedback

Share your experience or ask questions about this tool