CIDR to IP range
Just type in a CIDR block and we'll figure out the IP range for you.
IP range result
Network
First usable IP
Last usable IP
Broadcast
Total IPs
Usable hosts
How CIDR to IP range calculation works
CIDR notation tells you how many bits are used for the network part. Here's the thing-this calculator takes that prefix and converts it into the actual network address, broadcast address, and which IPs you can actually use. You'll run into this all the time when you're setting up firewall rules, configuring routing, or planning out subnets.