ADMINSUB.NET

Enter IP address and netmask (decimal separated by dots (e.g. 255.255.255.0), CIDR (e.g. 29) or a Cisco wildcard (e.g. 0.0.0.31) and the IPv4 subnet calculator will calculate the broadcast, network,... Cisco wildcard mask, host range and quantity of hosts. Online and for free. The wildcard is the inverse netmask used for access control lists (ACL's) in Cisco routers... 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.