Calculate network information, subnet masks and usable host ranges.
IP Address
CIDR Prefix
What is CIDR?
CIDR (Classless Inter-Domain Routing) is a method of allocating IP
addresses and routing Internet traffic. A CIDR prefix determines how
many bits are used for the network portion of an IP address, allowing
efficient subnetting and IP address management.
Use this free subnet calculator to determine the network address,
broadcast address, subnet mask, wildcard mask, usable host range and
available host count for any IPv4 subnet.