CIDR to IP range
Enter a CIDR block to calculate the IP range.
IP range result
Network
First usable IP
Last usable IP
Broadcast
Total IPs
Usable hosts
How CIDR to IP range calculation works
CIDR notation defines how many bits are reserved for the network. This calculator converts that prefix into the corresponding network, broadcast, and usable IP addresses. This is commonly used for firewall rules, routing, and subnet planning.