For given IPv4 or IPv6 address and netmask or prefix length, it calculates network address, broadcast address, maximum number of hosts and host address range. Version 1.5: Note: Now requires OS X 10.12 or later running on a. Each class has a range of valid IP addresses.Īddress Range of Class A - 1.0.0.1 to 126.255.255.254 (supports 16 million hosts on each of 127 networks).Ĭlass B - 128.1.0.1 to 191.255.255.254 (65,000 hosts on each of 16,000 networks).Ĭlass C - 192.0.1.1 to 223.255.254.254 (254 hosts on each of 2 million networks).Ĭlass D - 224.0.0.0 to 239.255.255.255 (address range reserved for multicast groups).Ĭlass E - 240.0.0.0 to 254.255.255.254 (reserved for future use, research and development purposes). subnetcalc is an IPv4/IPv6 subnet address calculator. CIDR notation format is a way to express IP addresses and their associated routing prefix. We can see two things: all host bits are zeroes in a network address, in a broadcast address they are all set.įirst bits determine the class of your network from A to E. Given an IP address and CIDR network size, it calculates the network.
#IP SUBNETCALC FREE#
This free online IPv4 subnet calculator also can be used as a teaching tool and presents the subnetting results as easy-to-understand binary values.
The wildcard is the inverse netmask used for access control lists (ACL's) in Cisco routers. Cisco wildcard mask, host range and quantity of hosts. This subnet calculator converts both IPv4 and IPv6 addresses and displays useful information about your subnets like number of.
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