Subnet Calculator
Enter an IP address and CIDR prefix to get the network address, broadcast address, host range and subnet mask.
How this calculator works
The address is combined with the subnet mask from the CIDR prefix to find the network and broadcast addresses and the usable host range.
Frequently asked questions
What does /24 mean?
A /24 prefix means the first 24 bits are the network, giving 256 addresses and 254 usable hosts.
IPv4 only.