CIDR Network Calculator
Country IP Blocks is pleased to annouce the release of its new CIDR Network Calculator.
Enter a legal IPv4 address and select a CIDR/Netmask from the dropdown and submit the data.
The form will output the following: IP address, CIDR Network (Route), network and broadcast addresess, Network/CIDR, Network/Netmask, Network/Cisco, bit mask, hosts bits, Netmask. number of subnets, number of hosts and the first and last host nodes within the network.
Please give it a try by clicking here.