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Online Subnet Mask Calculator

Network and IP Address Calculator

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

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

Subnet Mask Converter (Bit Point Decimal Format)

Network / Node Calculator

Decimal Subnet Mask Reverse Calculator

Decimal Subnet Mask Converter

Calculate Bitwise Invert IP Address (Reverse)

Network and IP Address Calculator

Default

Network ListNetwork 0.0.0.0, Mask 0.0.0.0×

Network Hosts 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

Calculate Subnet Mask from Host Count Converter

TCP/IP Base Converter

Subnet Mask to Number of Network Usable Addresses Converter

IP Multicast Address Range

All multicast addresses can be easily recognized because they start with the same bit pattern "1110".

224.0.0.0 - 224.0.0.255 Well-known multicast addresses for control channels

224.0.1.0 - 238.255.255.255 Globally scoped (Internet-wide) multicast addresses

239.0.0.0 - 239.255.255.255 Local multicast addresses

Introduction to Subnet Mask Calculator

Our Subnet Mask Calculator is a comprehensive tool for subnet calculation, local area network planning, and IP address format conversion. It provides various functionalities to facilitate subnet mask calculation and division, making it ideal for network administrators and IT professionals.

Using our Subnet Mask Calculator is straightforward:

  • Subnet Calculation: Calculate subnet masks and IP address ranges based on given parameters.
  • Network Planning: Plan and optimize your local area network (LAN) with efficient subnetting.
  • Mask Representation Conversion: Convert subnet masks between different formats and representations.

Key features of our Subnet Mask Calculator include:

  • Subnet Mask Division: Divide IP address spaces into smaller subnets with customized subnet masks.
  • Decimal and Binary Representation: Display subnet masks in decimal and binary formats for easy understanding.
  • IP Address Conversion: Convert IP addresses between decimal, binary, and other numeral systems.

Whether you're configuring a new network, optimizing an existing LAN, or learning about subnetting, our Subnet Mask Calculator offers essential tools for efficient network management.

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