IP Subnet Calculator

Subnetting is a method used to divide a larger network (IP range) into smaller, more manageable sub-networks. It improves performance, enhances security, and optimizes IP address usage within organizations.

In CIDR notation (Classless Inter-Domain Routing), the suffix (e.g., /24) specifies how many bits of the IP address represent the network portion. The remaining bits determine the number of possible host addresses.

For example, a /24 subnet provides 256 total addresses (254 usable hosts), while /30 provides 4 addresses (2 usable). Special cases like /31 and /32 are typically reserved for point-to-point links and single-host assignments.

Understanding subnetting is crucial for efficient IP management, routing optimization, and reducing broadcast traffic across networks.