Subnet Mask Calculate

Enter the TCPIP Network Address:

Force as Class:

DefaultClass AClass BClass C

Enter the required number of sub-networks:

OR enter the required number of nodes/hosts per network:

Network Class:

Subnet Mask:

Subnets:

Nodes/Hosts per Network:

Enter the Subnet Mask:

Enter the TCPIP Address:

Network:

Node/Host:

Broadcast Address:

Enter the dotted decimal TCPIP Address:

or Enter the binary TCPIP Address:

or Enter the hex TCPIP Address:

or Enter the decimal TCPIP Address:

Class	Address Range	Supports
Class A	1.0.0.1 to 126.255.255.254	Supports 16 million hosts on each of 127 networks.
Class B	128.1.0.1 to 191.255.255.254	Supports 65,000 hosts on each of 16,000 networks.
Class C	192.0.1.1 to 223.255.254.254	Supports 254 hosts on each of 2 million networks.
Class D	224.0.0.0 to 239.255.255.255	Reserved for multicast groups.
Class E	240.0.0.0 to 254.255.255.254	Reserved.