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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:	1 2 4 8 16 32 64 128 256 512 1024 2048 4096 8192 16384 32768 65536 131072 262144 524288 1048576 2097152 4194304 8388608
OR enter the required number of nodes/hosts per network (including network & broadcast addresses)***:	2 4 8 16 32 64 128 256 512 1024 2048 4096 8192 16384 32768 65536 131072 262144 524288 1048576 2097152 4194304 8388608 16777216 33554432 67108864 134217728 268435456 536870912 1073741824 2147483648
Network Class:
Subnet Mask:	or
Subnets:
Nodes/Hosts per Network (including network and broadcast addresses)***:
*** To add support for RFC3021 which allows for /31 networks, the subnet mask calculator has changed to accomodate this. To do this, the number of hosts now include the network and broadcast addresses since these are used for hosts in /31 networks.
Network/Node Calculator
Enter the Subnet Mask:
Enter the TCPIP Address:
Network:
Node/Host:
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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