IP Subnet Calculator

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IP Subnet Calculator

IP Subnet Calculator is useful for designing networks and troubleshooting IPv4 networks, and it assists you with preparing for your CompTIA Network+ exam. When you read the following article about CIDR notation, find out what a subnet mask is. Are you interested in managing networks? Our calculator can help you understand file permissions and solve them!

How does a subnetwork?

IP addresses represent networks and hosts (computers on the network) in an Internet Protocol (IP) network. Subnetting, or dividing an IP address, is dividing it. Data is exchanged between subnets using the network part of routers and sent to individual hosts using the host part. In the bandwidth calculator, you can estimate the time it will take. It is worth noting that this calculator applies to IPv4 networks, although it also provides an IPv6 address mapped to IPv4 and the IPv6 to IPv4 prefix address.

IP Subnet Calculator

Network subnetting: why should you do it?

It is a good idea to subnet your network for several reasons. Subnetting was developed due to the overabundance of IPv4 addresses allocated to organizations that might only need some of those addresses. There were many reasons for subnetting, but this was the main reason. The unused IP addresses were becoming wasteful.

Your network can be easily organized using partitioned private networks. Each department can have its subnet, and a certain range of addresses can be assigned to each department. By looking at the IP Subnet Calculator, you can easily determine which department is experiencing problems. As you can already see, this makes it easier to organize and manage the network. It is also possible to divide the network according to buildings or floors. For instance, you can assign addresses for every building in your network. This allows you to identify which building has a problem easily. Subnetting helps organize the network, keep it clean and separate the sections by department, building, or floor.

You can also extend your IP address range via subnetting, even though it is usually referred to as super netting. This allows you to add more IP Subnet Calculators to your network. You can use this to extend the range of IP addresses in a specific area. You can always add another subnet mask to a subnet if you have used all its IP addresses. By changing the subnet mask, you can release unused IP addresses and use them in another subnet if you have a lot of free IP addresses in a subnet that is not being used.

Subnetting is also a good idea for security. If you separate your network and allocate IP addresses in an organized manner, you can control who has access to which information more effectively. For instance, by creating separate subnets for each department, you can easily control departmental access. You can keep finance and sales information out of other departments' hands.

Subnet mask - what is it?

A good way to design a network is to balance the IP address's network and host parts so that you do not have too many network addresses (limiting how many networks can be routed to) or too few host addresses (limiting the number of computers on the network). In a 32-bit IP address, several bits are allocated to represent a subnet. The remaining bits represent a host address in a subnet mask.

CIDR notation

As the Internet evolved, there were three basic subnet masks, which utilized 8 bits of one in the mask. These network types were Class A, Class B, and Class C. Because of this scheme, there is a broad jump in host counts per network, with a coarse choice of host counts per network. With Classless Inter-Domain Routing (CIDR), the network designer can assign any number of bits to the network prefix, opening a wider selection of hosts per network. It eliminates the class model. For example, a Class A network would use the first 8 bits of the network mask. Hence its notation is /8, which is the number of bits followed by a forward slash.

What is the best way to calculate IP and network properties?

You can see many IP addresses and network properties using this IP Subnet Calculator. We will walk you through each and look at further resources for assistance.

What is the type of IP address - public or private?

In addition, there are two types of IP addresses: public and private. Public addresses are used on public networks, whereas private addresses are used on local networks (e.g., your home network).

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IP class

IP addresses used to be classified by classes too, and the ranges of addresses belonging to each type are as follows:

  • Class A: -
  • Class B: -
  • Class C: -
  • Class D: -
  • Class E: -

An Internet address of class D is reserved for multicast traffic, meaning it can only be assigned to one host to send data to several receiving hosts simultaneously. Class E's Internet address is reserved, meaning it cannot be assigned to anyone on the public Internet.

IPv4 subnet calculators

The router must know the network address and subnet mask to determine whether incoming IP packets should be routed to the subnetwork. Each subnet has its address, and the subnets are interconnected via routers. You can find it challenging to calculate networks when considering different parameters, such as how many subnets to create and how many hosts to have in each subnetwork.

Using the IP Subnet Calculator, you can determine the number of possible subnets for an address block in your network. To get the host address range and broadcast address for any subnet mask, choose the number of subnets and several hosts in each subnet that best suit your network. A great option is to use an IP range calculator or subnet mask calculator to double-check your subnet calculations before configuring the router. Still, it is easier mentally than partitioning a large network and assigning IP addresses to different teams.

Simplify network design and troubleshooting with the IP Subnet Calculator, a versatile tool that helps you organize, manage, and optimize your network for efficient performance.


A handy tool like IP Subnet Calculator can make many things easier for you. It is self-explanatory, so it is easy for even a non-techie person to use it. Many options are available to adjust the subnet size and range with the calculator. Just spend some time on it and play around with the options. You will save a great deal of time and energy once you get the hang of it.