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. Run the free subnet calculator to convert a CIDR block into every derived subnet parameter without installing any software.

Input

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Common prefixes:

IPv6 Subnet Details

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

First Address
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Last Address
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Total Addresses
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Related Network Tools

Explore these related tools for subnet calculation and IP address management. Use the cidr calculator to validate a CIDR block, expand the IP range, and get the wildcard mask for access list configuration.

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More tools to support network design, addressing, and subnet troubleshooting. The ipv6 address expander reconstructs the complete 128-bit address from any compressed IPv6 shorthand notation.

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