How to Calculate a Subnet Mask From Hosts and Subnets

How to Calculate a Subnet Mask From Hosts and Subnets

A subnet or subnetwork is a part of a larger network that is connected to the internet. A subnet is the logical division of the IP address and network into many smaller parts and divisions. 

The speed of the internet and the rate of the transfer in a network that specifies the amount of products transferred is called throughput. This term is often used to describe a company’s product output and production rate or the speed of processing something. 

In data networking, throughput determines the speed and amount of data transferred in a particular amount of time. The throughput is measured in kilobits per second (kbps), megabits per second (Mbps) or gigabits per second (Gbps). 

What is Subnet Mask? 

A subnet mask is a 32-bit number formed by setting the host bit 0s and the network bits 1s. Using subnet mask, the Ip address is divided into network and hosting address. 

The local connection device called gateway sends data packets and information to an IP address, which then sends the data to its destination outside of the local network. 

Subnet mask and gateway or router include the Internet Protocol that almost all networks use to facilitate inter-device network and communication. 

How to Calculate Subnets Mask? 

The number of subnets is determined by counting the number of bits in which the original mask was expanded (also known as subnet bits). The subnet formula is 2s. Where is the number of 1s added to the subnet mask, regardless of what the subnet mask was. Take the same example as above, but build on it.  

Using the network, 100 remote locations with 300 PCs each are assumed. Which subnet mask should I use? In the last example, we found that the subnet mask provides 510 hosts per subnet. 

IP Subnet Calculator 

This calculator returns a large amount of information about Internet Protocol version 4 (IPv4) and IPv6 subnets. This includes possible network addresses, Usable host address, subnet masks and IP classes. 

The subnet address is identified by all 0 bits of the host portion of the address. The first host in the subnet is all identified by 0s and 1s. The last host is all identified by 1s and 0s. 

How to Increase Performance and Speed? 

As every device has an entry point to the network, a single broadcast packet sends information that reaches all the devices connected to that network. However, a large number of entry points can adversely affect not only the performance of network switching devices but also the overall performance of the network. 

Subnetting keeps data traffic destined for devices within the subnet on this subnet, reducing congestion. Strategic placement of subnets can offload your network and route traffic more efficiently. 

Size must be considered when planning and designing your network. One of the main benefits of subnetting is that you can control the growth of your network. 


Subnet or subnetwork is a part of a larger network that is connected to the internet. Subnet mask includes the IP that is used by all the networks for inter-device communication. 

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By Honey Rehan

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