Network · Calculator

IP & Subnet

Validate IPv4 addressing and plan a small AV network.

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Enter the known values. ShowSide validates them before running the calculation.

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Result

Enter values to calculate

Enter an IPv4 address and prefix or mask to calculate network, broadcast, host range and capacity.

Transparent math

IPv4 only. Prefixes /0 through /30 reserve the first and last addresses for network and directed broadcast.
/31 uses two point-to-point endpoints per RFC 3021; /32 represents one host route. Neither has a directed broadcast.
Host counts are mathematical subnet capacity, not a list of available or routable device addresses. No network scanning or switch configuration is performed.

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