$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.
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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