Overview
This Privacy Policy describes how NetmaskCalculator.com ("we", "our", or "the website") collects, uses, and handles information when you use our website atnetmaskcalculator.com. We are committed to protecting your privacy and being transparent about our data practices.
Information We Collect
Information You Provide
Our IP subnet calculator operates entirely in your browser using JavaScript. Any IP addresses, subnet masks, or CIDR prefixes you enter into the calculator are never transmitted to our servers — all calculations are performed locally on your device.
Automatically Collected Information
Like most websites, we may automatically collect certain technical information when you visit, including:
- IP address (for analytics and security purposes)
- Browser type and version
- Operating system
- Pages visited and time spent
- Referring website (how you found us)
- Date and time of visit
This information is collected in aggregated, anonymised form and is used only to understand how visitors use our site and to improve it.
Cookies
We may use cookies and similar tracking technologies. Cookies are small text files stored on your device. We use:
- Essential cookies — required for basic site functionality
- Analytics cookies — help us understand how visitors use the site (e.g. Google Analytics)
- Advertising cookies — if advertising is enabled on this site, third-party ad providers may set cookies to show relevant advertisements
You can control cookie settings through your browser preferences. Disabling cookies may affect some site functionality.
Advertising
This website may display advertisements served by third-party advertising networks. These networks may use cookies and similar technologies to show you relevant ads based on your browsing history across websites. We do not control the specific cookies placed by third-party advertisers.
If you wish to opt out of interest-based advertising, you can visitaboutads.info ornetworkadvertising.org.
Third-Party Services
We may use the following third-party services, each with their own privacy policy:
- Google Analytics — website traffic analysis (Google Privacy Policy)
- Google AdSense — advertising (Google Privacy Policy)
- Google Fonts — typography (Google Privacy Policy)
How We Use Your Information
We use the information we collect to:
- Operate and improve the website
- Analyse usage patterns to enhance user experience
- Serve advertisements (if enabled)
- Monitor for security threats and abuse
- Comply with legal obligations
We do not sell, rent, or trade your personal information to third parties.
Data Retention
We retain server logs and analytics data for up to 26 months, after which they are deleted or anonymised. Since the calculator operates entirely in your browser, no input data (IP addresses, subnet masks) is retained by us at all.
Your Rights (GDPR / CCPA)
Depending on your location, you may have rights including:
- The right to access personal data we hold about you
- The right to rectification of inaccurate data
- The right to erasure ("right to be forgotten")
- The right to restrict or object to processing
- The right to data portability
- The right to opt out of sale of personal information (CCPA)
To exercise any of these rights, contact us using the details below.
Children's Privacy
This website is not directed at children under 13. We do not knowingly collect personal information from children under 13. If you believe a child has provided us personal information, please contact us and we will delete it.
Changes to This Policy
We may update this Privacy Policy from time to time. When we do, we will update the "Last updated" date at the top of this page. We encourage you to review this policy periodically.
Contact Us
If you have questions about this Privacy Policy or how we handle your data, please contact us at:
privacy@netmaskcalculator.com