CIDR Calculator
Calculate network information from CIDR notation. Get network address, broadcast, usable hosts, subnet mask, and IP range.
What is CIDR?
CIDR (Classless Inter-Domain Routing) is a method for allocating IP addresses and routing Internet Protocol packets. It uses a notation format like 192.168.1.0/24, where the number after the slash indicates the prefix length.
CIDR allows for more flexible allocation of IP addresses compared to the older classful network addressing system.
Common Use Cases
- Network planning and subnet design
- Calculating available IP addresses in a subnet
- Understanding network ranges and boundaries
- Configuring firewalls and access controls
- Cloud infrastructure and VPC setup