IP Subnet Calculator

Calculate subnet mask, network address, broadcast address

Enter information

CIDR Reference

CIDRSubnet MaskHostsUsable
/24255.255.255.0256254
/25255.255.255.128128126
/26255.255.255.1926462
/27255.255.255.2243230
/28255.255.255.2401614
/29255.255.255.24886
/30255.255.255.25242
/31255.255.255.25422
/32255.255.255.25511

IP Subnet Calculator - Calculate subnet mask online

Tool to calculate subnet mask, network address, broadcast address from IP and CIDR.

Outstanding features

Calculate network/broadcast address
Show usable hosts
Classification of IP class
CIDR reference table

What is a subnet?

Subnet (subnetwork) is to divide a large network into smaller networks for better management and security.

Benefits when used

  • •Calculate subnet quickly
  • •Supports CIDR notation
  • •Display binary mask

How to use

  1. 1Enter IP address
  2. 2Select CIDR prefix
  3. 3Click Calculate

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