IP / CIDR Calculator

Calculate network address, subnet mask, host range and wildcard mask for IPv4 CIDR blocks.

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Tool area

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IPCIDRSubnet

Tool area

The tool will be ready here as soon as the page finishes loading.

How to use

1 Enter an IPv4 address with CIDR prefix.

2 Review the network summary instantly.

3 Copy the values you need for configs or docs.

Common uses

Subnet planning

Firewall and route checks

Quick IPv4 range verification

FAQ

What is IP / CIDR Calculator useful for?

Subnet planning

How do I start using IP / CIDR Calculator?

Enter an IPv4 address with CIDR prefix. Review the network summary instantly. Copy the values you need for configs or docs.

What should I do after this result?

Most people continue with JSON Formatter, Regex Tester, HTTP Status Code Lookup next.