router
Network

Subnet Calculator

verified_user

Calculate network masks, broadcast addresses, and host ranges.

Supports IPv4 CIDR notation (e.g. 10.0.0.1/8)

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Privacy & Security

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check_circle Server-side-Side
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update v1.0
info

About This Tool

This tool runs entirely in your browser. No data is sent to any server, ensuring complete privacy. Simply use the interface above to get started — no registration or login required.

Disclaimer: This tool is provided "as is" without warranty of any kind. Results are for educational and utility purposes.