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IPv4 Subnet Calculator

Netmask
192.168.0.0/24
Network address
192.168.0.0
Network mask
255.255.255.0
Network mask in binary
11111111.11111111.11111111.00000000
CIDR notation
/24
Wildcard mask
0.0.0.255
Network size
256
First address
192.168.0.1
Last address
192.168.0.254
Broadcast address
192.168.0.255
IP class
C

Tool guide

Calculate IPv4 subnets from CIDR

Enter an IPv4 address and prefix or mask to inspect the network, broadcast address and host range.

How to use

  1. Enter the address and select a prefix or mask.
  2. Review the range alongside the target device configuration.

Example and expected result

Input: 192.168.1.70/26
Network: 192.168.1.64
Broadcast: 192.168.1.127
Conventional host range: 192.168.1.65–192.168.1.126

Capabilities and limits

  • Interpret /31 and /32 address usability according to the target network.
  • Handles IPv4 only; it does not plan IPv6 or configure routing.

Troubleshooting

A network address different from the input usually reflects the subnet boundary. Check the prefix rather than treating every host address as a network address.

Data processing and storage

Calculations take place in the current page without visiting or scanning the entered network.

Read the full data-processing notice