Subnet Mask Calculator

Network and IP Address Calculator

Displays the network, broadcast, first and last given network addresses

The network mask "bit format" is also known as CIDR format (CIDR = Classless Inter-Domain Routing).

Subnet Mask Converter (Dot Decimal Format)

Network/Node Calculator

Decimal Subnet Mask Inverter

Decimal Subnet Mask Converter

Calculate Inverse of an IP Address (Invert)

Network and IP Address Calculator

Default

Network List Network 0.0.0.0, Mask 0.0.0.0 ×

Network Host Broadcast Address
Start End
0.0.0.0 0.0.0.0 0.0.0.0 0.0.0.0
0.0.0.0 0.0.0.0 0.0.0.0 0.0.0.0
0.0.0.0 0.0.0.0 0.0.0.0 0.0.0.0
0.0.0.0 0.0.0.0 0.0.0.0 0.0.0.0

Host Count to Mask Address Calculator

TCP/IP Base Converter

Mask Conversion to Number of Usable Addresses

IP Multicast Address Range

All multicast addresses can be easily identified because they start with the prefix "1110".

224.0.0.0 - 224.0.0.255 Known multicast address, control channel

224.0.1.0 - 238.255.255.255 Global (Internet-wide) multicast addresses

239.0.0.0 - 239.255.255.255 Local multicast address

Subnet Mask Calculator - LAN Planning and Subnet Division Tool

Welcome to use Subnet Mask Calculator! This tool helps you easily plan a local area network, supports quick subnet division and IP address base conversion, providing efficient solutions for network administrators and developers.

Feature Highlights

  • Subnet Division Calculation: Quickly calculate the number of subnets, ranges, and usable host counts based on the input IP address and subnet mask.
  • Subnet Mask Base Representation: Provides conversion of subnet masks in binary, decimal, and CIDR formats.
  • IP Address Base Conversion: Supports representing IP addresses as binary, octal or hexadecimal.
  • LAN Planning: Designs reasonable IP address allocation schemes for small and medium enterprises or home networks.

Usage Scenarios

This tool is suitable for the following scenarios:

  • Network administrators need to divide reasonable subnets for companies or organizations.
  • Developers need to understand details about subnet masks and IP addresses in network configurations.
  • In education or learning, need to understand the calculation process of subnet division and base conversion.

How to Use the Subnet Mask Calculator?

  1. Input your IP address (e.g., 192.168.1.1).
  2. Select the subnet mask (e.g., 255.255.255.0 or the CIDR representation /24).
  3. Click “Calculate”, and you will obtain the following results:
    • Subnet Range
    • Usable Host Count for Each Subnet
    • Binary and Decimal Representation of Subnet Mask

Base Representations of Subnet Masks and IP Addresses

IP Address/Subnet Mask Binary Decimal Hexadecimal
192.168.1.1 11000000.10101000.00000001.00000001 192.168.1.1 C0.A8.01.01
255.255.255.0 11111111.11111111.11111111.00000000 255.255.255.0 FF.FF.FF.00

Why Choose Our Subnet Mask Calculator?

  • Easy to Use: No manual calculations needed, complete subnet division and conversion with one click.
  • Powerful Functionality: Supports various base representations and complex network planning needs.
  • Completely Free: Provides free tools for network administrators, developers, and students.

Frequently Asked Questions

What is a Subnet Mask?
A subnet mask is used to distinguish the network portion of an IP address from the host portion, used to divide subnets and determine subnet ranges.
What is CIDR Notation?
CIDR notation uses a number after a slash to indicate the number of network bits in the subnet mask, for example, /24 represents 255.255.255.0.
How to Choose a Subnet Mask?
Choose an appropriate subnet mask based on the actual needs for the number of subnets and the number of hosts in each subnet.

Use Subnet Mask Calculator now to easily complete network planning and subnet division, improving work efficiency and network management quality!

Your footpath:
Choose Language