Subnet Calculator

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Subnet Calculator IP Address or Subnet: ABOUT SUBNET CALCULATOR The subnet calculator lets you enter a subnet range (CIDR) and see IP address information about that range. It also lists each IP address in the range and automatically does a Reverse IP Lookup for you. You can type your range directly in CIDR notation, or use the optional Mask pull-down: 74.125.227.0/29 74.125.227.0 255.255.255.248 74.125.227.0, then select Optional Mask from dropdown This is a useful feature for service providers and network operator who frequently allocate and work with subnets. CIDR stands for Classless Inter-Domain Routing, and refers to the standard of dividing the entire IP address space into smaller networks of variable size.
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