IP Calc

Network Subnet Calculator

INPUT
Supports CIDR notation (e.g., 10.0.0.0/8)
MASK
Optional if CIDR included in address. Leave empty for default class mask.
SPLIT
Break the network into smaller subnets. Enter a CIDR larger than the netmask (e.g., 26 splits a /24 into four /26 subnets).