CIDR Subnet Calculator
Calculate subnet information from IP address and CIDR notation. Get network address, broadcast address, and host count.
About CIDR and Subnet Calculation
CIDR (Classless Inter-Domain Routing) notation is a method for allocating IP addresses and routing Internet Protocol packets. It's expressed as an IP address followed by a slash and a number (e.g., 192.168.1.0/24), where the number indicates the number of leading bits in the network mask.
Subnet calculation is essential for network administrators, DevOps engineers, and cloud architects who need to design and manage IP address spaces. Understanding subnet boundaries, available host addresses, and network topology is crucial for proper network configuration and security planning.
Our calculator provides comprehensive subnet information including the network address (the first address in the subnet), broadcast address (the last address), usable IP range, number of available hosts, and the subnet mask. This information is vital for configuring routers, firewalls, and network security policies.