🌐 Free online tool

IPv4 Subnet Calculator

Calculate IPv4 subnet details including CIDR, network address, broadcast address, subnet mask, wildcard mask and usable hosts.

Enter an IP address and subnet mask, or use CIDR notation.

IPv4 Address Example: 192.168.1.25

Subnet Mask or CIDR

Examples: 255.255.252.0, /22, or 22

Network Address -

Broadcast Address -

Subnet Mask -

Wildcard Mask -

CIDR Prefix -

First Host -

Last Host -

Total Addresses -

Usable Hosts -

Subnet Calculator Online

Calculate detailed IPv4 network information using an IP address, subnet mask, or CIDR notation.

The tool automatically identifies the format you enter and displays the available subnet information.

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Tip

For example, you can enter: 192.168.0.25 and 255.255.252.0 or simply: 192.168.0.25/22.

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