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IP Subnet Calculartor

The IP Subnet Mask Calculator enables subnet network calculations using network class, IP address, subnet mask, subnet bits, mask bits, maximum required IP subnets and maximum required hosts per subnet.

What is "Subnetwork"? Read here for more

Supplement document: "Understanding IP Addressing- Everything You Ever Wanted To Know"(2.8MB)

Subnet Mask Calculator

number of sub-nets:
number of hosts:

Network Class: subnetted as
Subnet Mask: or

Network/Node Calculator

Subnet Mask:
TCPIP Address:

Broadcast Address:


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