Free Subnet Calculator
for IPv4 & IPv6

Instant CIDR breakdown — network address, broadcast, usable range, wildcard mask, host count. No ads. No sign-up.

IP Address

CIDR Prefix

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Network Address

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Broadcast Address

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Subnet Mask

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Wildcard Mask

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First Usable Host

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Last Usable Host

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Usable Hosts

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Total Addresses

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Binary Subnet Mask Visualizer

Network bits

Host bits

Address Breakdown

Address	Type	Usable?

Common IPv4 Subnets — Click to Calculate

Free Subnet Calculatorfor IPv4 & IPv6