Is this tool free to use?

Yes. Every public Alexonic tool is completely free to use with no charge.

Do I need an account?

No account is required for public tools. Some private/admin features may be separate from the public site.

Can I use this tool for work?

Yes, but verify important results before using them in production, payroll, finance, tax, or business decisions.

Do you save my tool data?

No. We do not save your tool inputs or generated results. We value customer privacy, but you should still avoid entering sensitive personal, banking, password, customer, or confidential business data into public web tools.

How can I report an issue or request a tool?

Send feedback to the developer if you see an issue, need a new tool, or require an update. We continue building and fixing each day.

Subnet / CIDR Calculator

Calculate IP subnets and address ranges

Enter an IP address with CIDR prefix (e.g. 192.168.1.0/24) to instantly get the network address, broadcast, host range, and more.

CIDR notationNetwork rangeUsable hosts

Summary

192.168.1.0/24

Subnet mask255.255.255.0

Usable hosts254

CIDR prefix/24

Calculator

All calculations are done in your browser with no data sent to any server.

IP Address / CIDR

Network address192.168.1.0

Subnet mask255.255.255.0

Wildcard mask0.0.0.255

Broadcast address192.168.1.255

First usable host192.168.1.1

Last usable host192.168.1.254

Total addresses256

Usable hosts254

Host bits8

Examples

Common subnets

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Help & answers

Frequently Asked Questions

Important disclaimer: Alexonic Tools is completely free to use. There is no charge, and we do not save tool inputs or generated results. We value customer privacy and keep building and fixing each day. Always verify important financial, payroll, legal, tax, business, or production-code results before relying on them. If you see an issue, need a tool, or require an update, send feedback to the developer.