Subnet mask calculator

With subnet mask you can split your network into subnets. Enter your IP address and play with the second netmask until the result matches your need.

This type of notation is also known as CIDR. CIDR (Classless Inter-Domain Routing, sometimes known as supernetting) is a way to allocate and specify the Internet addresses used in inter-domain routing more flexibly than with the original system of Internet Protocol (IP) address classes.

IP Address / Mask


Address: 01010010.10100001.10110000.01101011
Netmask: 11111111.11111111.11110000.00000000
Wildcard: 00000000.00000000.00001111.11111111
Network Address: / 20 01010010.10100001.10110000.00000000
Broadcast Address: 01010010.10100001.10111111.11111111
First host: 01010010.10100001.10110000.00000001
Last host: 01010010.10100001.10111111.11111110
Total host count: 4094

Term definitions

Wildcard: Inverse of netmask. Used by certain firewalls for access control list

Broadcast: IP broadcast addresses are used for single-packet one-to-everyone delivery. A sending host addresses the IP packet using a broadcast address and every node on the sending node's network segment receives and processes the packet. IP broadcast addresses can be used only as the destination IP address. IP routers do not forward network broadcast packets.

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