Network Calculators  Networking

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For help with any of the calculators, click here. For a history of the updates, click here. If you think the calculator is wrong because it shows the first and last ('all zeroes' and 'all ones') subnets as being available, click here for an explanation.

Subnet Mask Calculator

Enter the TCPIP Network Address:
Force as Class: Default Class A Class B Class C
Enter the required number of sub-networks:
OR enter the required number of nodes/hosts per network:

Network Class:
Subnet Mask: or
Nodes/Hosts per Network:

Network/Node Calculator

Enter the Subnet Mask:
Enter the TCPIP Address:

Broadcast Address:

IP Address Converter

Enter the dotted decimal TCPIP Address:
or Enter the binary TCPIP Address:
or Enter the hex TCPIP Address:
or Enter the decimal TCPIP Address:

Subnet Mask Converter

Enter the dotted decimal Subnet Mask
or Enter the number of bits in the subnetmask /

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