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Calculate the subnet.
See every boundary.
Enter an IPv4 address in CIDR notation to calculate the network, broadcast, mask, wildcard, and host range.
IPv4 subnet calculator
Host counts follow common IPv4 conventions: /31 and /32 are shown without subtracting network and broadcast addresses.
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QUICK ANSWERS
What is CIDR notation?
CIDR writes an IPv4 address followed by a prefix length, such as 192.168.1.0/24. The prefix length tells you how many bits belong to the network.
Does this check routing or firewall rules?
No. It only calculates the mathematical boundaries of the entered IPv4 subnet.