IP Subnet Calculator

- May 22, 2025

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IP Subnet Calculator

Calculate network information including subnet mask, network address, broadcast address, and usable host range for both IPv4 and CIDR notation.

Network Information

IP Address:

Subnet Mask Format:

CIDR Prefix:

Display Options

Show binary representation

Show hexadecimal representation

Subnet Calculation Results

Network Address

192.168.1.0

/24

Subnet Mask

255.255.255.0

CIDR Notation

/24

Prefix Length

Wildcard Mask

0.0.0.255

Inverse of Subnet Mask

Broadcast Address

192.168.1.255

First Usable IP

192.168.1.1

Last Usable IP

192.168.1.254

Total IP Addresses

256

Usable IP Addresses

254

IP Class

Class C

Binary Representation

	Octet 1	Octet 2	Octet 3	Octet 4	Decimal
IP Address	11000000	10101000	00000001	00000001	192.168.1.1
Subnet Mask	11111111	11111111	11111111	00000000	255.255.255.0
Network Address	11000000	10101000	00000001	00000000	192.168.1.0
Broadcast Address	11000000	10101000	00000001	11111111	192.168.1.255

Hexadecimal Representation

	Hexadecimal	Decimal
IP Address	C0.A8.01.01	192.168.1.1
Subnet Mask	FF.FF.FF.00	255.255.255.0
Network Address	C0.A8.01.00	192.168.1.0
Broadcast Address	C0.A8.01.FF	192.168.1.255

About IP Subnetting

IP subnetting is the process of dividing an IP network into sub-networks to improve security, network performance, and address allocation efficiency.

Common Subnet Masks

CIDR	Subnet Mask	Usable Hosts
/24	255.255.255.0	254
/25	255.255.255.128	126
/26	255.255.255.192	62
/27	255.255.255.224	30
/28	255.255.255.240	14
/29	255.255.255.248	6
/30	255.255.255.252	2
/31	255.255.255.254	0*
/32	255.255.255.255	1**

* RFC 3021 allows /31 networks for point-to-point links
** Single host address

What is an IP Subnet Calculator?

An IP Subnet Calculator is a handy tool that helps users calculate important network details. It can provide the subnet mask, network address, broadcast address, and the range of usable hosts. This tool supports both IPv4 addresses and CIDR notation, making it versatile for different networking needs.

Why Use the IP Subnet Calculator?

Using this calculator can save time and effort. Here are some benefits:

Quickly find the correct subnet mask and network address.
Easily determine the range of usable IP addresses.
View results in both binary and hexadecimal formats.

Understanding Subnetting Basics

Subnetting divides a large network into smaller, manageable sections. This improves performance and security while making address allocation more efficient. Understanding the basics of subnetting can help network administrators manage their networks more effectively.

How to Enter Your Details

Users can enter their IP address and choose a subnet mask format. You can select either CIDR notation or a traditional subnet mask. This flexibility allows you to work with the format that best fits your needs.

What Results Can You Expect?

Once data is entered, the calculator provides a variety of useful information. Key results include:

Network Address
Subnet Mask
Broadcast Address
First and Last Usable IP Addresses

Exploring Binary and Hexadecimal Representations

The calculator also shows binary and hexadecimal representations of the IP and subnet mask. This additional layer of detail can be very helpful for those who need to work with different number systems in networking.

Learning About Subnet Masks

Subnet masks are essential for defining networks. Common subnet masks include:

/24 - 255.255.255.0 (Usable Hosts: 254)
/25 - 255.255.255.128 (Usable Hosts: 126)
/26 - 255.255.255.192 (Usable Hosts: 62)

These masks help determine how many hosts can be on a network. Familiarity with subnet masks can aid in efficient network design.

Wrapping Up Your Networking Experience

The IP Subnet Calculator is a simple yet powerful tool for anyone involved in networking. Whether you’re a beginner or an experienced admin, this calculator can help streamline your subnetting tasks and improve your overall network management skills.

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