Net CalculatorYour browser does not support JavaScript (if you are using Netscape 3 or higher or Microsoft Internet Explorer 4 or higher you may have JavaScript turned off in your network preferences), so you cannot use the Network Calculators. If you use a JavaScript-capable browser, such as Microsoft Internet Explorer version 5 or Netscape Navigator version 6, you'll be able to use the calculators.Netscape Navigator 4.x Users: There is a known bug in Netscape Navigator 4.0.x which will cause you to see this message if you have the local cache turned off. Subnet Mask Calculator TCP/IPAddress: number of sub-nets: -or-number of hosts: Network Class: subnetted as Subnet Mask: or Subnets: Nodes/Hosts: Network/Node Calculator Subnet Mask: TCPIP Address: Network: Node/Host: Broadcast Address: