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What is a Subnet Mask?

Marrium Akhtar

Note: Before we dive into what a subnet mask is and how it works, know that the subject can be technical and involve jargon that is hard to digest.

What is a Subnet?

Millions of networks operate on the web, and each network varies in size. The more extensive a network is, the more difficult it is to administer and ensure that it operates smoothly. The smaller a network, the easier it is to manage and maintain the network.

A network that is small, meaning it is separated into smaller pieces, those individual pieces are known as subnets. In other words, a subnet is a name given to a small network.

Why subnet a network?

Subnetting has several advantages, such as:

Although the benefits of subnetting a network are remarkable, a subnet tends to require additional hardware. This is because you’re essentially dividing the network into several pieces, and you’ll need extra resources such as routers, which will increase the cost of the entire process.

What is a Subnet Mask?

A subnet mask is a number that outlines a range of IP addresses that are available within a given network. An IP address consists of 32 binary bit numbers (4×8). That’s a long number that can get complex for many. Hence, a dot-decimal system is used to easily understand and make use of IP addresses.

An IP address is divided into two addresses – a network address and a host address. If you’re wondering what your IP is, head over to the page.

A single subnet mask bounds the number of acceptable IPs for a specific network. Several subnet masks can organize a single network into smaller networks (called subnetworks or subnets).

A subnet mask is similar to an IP address, but it’s used for internal network communication. Devices within the same subnet can conveniently communicate directly with each other, while devices on different subnets will need to communicate with the help of a router.

Here’s an example of a subnet mask:

192.168.146.123 = 11000000.10101000.01111011.10000100

The subnet mask indicates the network share of the IP address. This means the subnet mask could look something like this:

255.255.255.0 = 11111111.11111111.11111111.00000000

The information above can be technical, but you’re probably a technical person, which is why you’re here. Keep in mind that the IP address will change if you’re using a VPN service. To better understand the answer to the question what is a VPN? head over to the page.

Classes of IP Addresses

An Internet Protocol address is divided into three classes:

Class A, Class B, and Class C. Although two other classes exist (Class D and Class E), they are not utilized by internet users. Classes (A, B & C) each have their own default subnet mask.

Class A IP address

Class A networks use a subnet mask of 255.0.0.0 and have 0-127 as their first octet. It enables 126 networks and nearly 17 million hosts per network.

Class B IP address

Class B uses a subnet mask of 255.255.0.0 and has 128-191 as its first octet. This class is utilized by medium and large networks and allows 16,000 networks and 65,000 hosts per network.

Class C IP address

Class C is used for local area networks (LAN) and allows 2 million networks with 254 hosts each. Class C uses a subnet mask of 255.255.255.0 and has 192-223 as its first octet.

How to Find the Subnet Mask

Finding a subnet mask is a straightforward process. Here’s how to find a subnet mask on Mac, Windows, Android, and iOS devices:

How to find a subnet mask on macOS

How to find a subnet mask on Windows

How to find a subnet mask on iOS

How to find a subnet mask on Android

How do I find the subnet mask of an IP address?

The subnet mask of an IP address is a sequence of numbers that determines which part of the IP address is the network ID and which part is the host ID. The network ID is used to identify the network that the device is connected to, while the host ID is used to identify the specific device on that network.

To find the subnet mask of an IP address, you need to know the network ID and the host ID. The network ID is usually represented by a series of zeros, while the host ID is usually represented by a series of ones. For example, if the IP address is 192.168.0.1, the subnet mask would be 255.255.0.0.

Once you know the network ID and the host ID, you can use a subnet mask calculator to determine the subnet mask. There are many online calculators that can be used for this purpose. Simply enter the IP address and the calculator will return the subnet mask.

What is a Subnet Mask Calculator?

A subnet calculator enables internet users to access a range of information such as a subnet mask, the network addresses associated, the IP class, host ranges that can be utilized, and so much more. Here’s on overview:

Similarly, an IPv4 to IPv6 converter exists that enables you to convert an IP address from IPv4 to IPv6.

Why Should You Hide Your IP Address?

Think of an IP address as your cell phone number. Having your IP address out in the open is like exposing yourself to cybercriminals. You don’t want your cell phone number to be publicly available as you’d start receiving calls and messages from unknown people.

Here are more reasons why you should hide your IP address:

PureVPN’s plans come packed with exciting privacy features that mask your real IP address and encrypt your online traffic with state-of-the-art AES 256-bit encryption. The user-friendly app is compatible with nearly all devices, and you can connect up to 10 devices simultaneously.

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