By using SubnetKit you agree to these terms. If you do not agree, please do not use the site.
SubnetKit computes subnet, VLSM, IPv6 and route-summarisation results from the values you enter. We implement the standard algorithms with care, but you are responsible for verifying every address plan before applying it to a production network, firewall, ACL or routing configuration. The service is provided “as is” without warranties of any kind, express or implied, including accuracy, fitness for a particular purpose or uninterrupted availability.
The core calculator is free for personal, educational and commercial use. The optional Pro upgrade is a one-time purchase that unlocks additional features (unlimited VLSM networks, the route summarisation tool, CSV export, saved projects and printable subnet plans) in the browser where the licence key is activated. Licence keys are personal, non-transferable and may not be shared or resold. Refunds are handled according to the payment provider's policy shown at checkout.
You may not attempt to disrupt the site, scrape it in a way that degrades service for others, remove attribution, or use it for any unlawful purpose.
The site may display advertisements and partner (affiliate) links such as a recommended networking course. We are not responsible for the content, products or privacy practices of third-party sites.
The SubnetKit name, design, text and code are owned by the site operator. You may share links to the site and the results of your own calculations freely.
To the fullest extent permitted by law, the site operator shall not be liable for any direct, indirect, incidental or consequential loss – including network outages, misconfiguration or data loss – arising from use of or reliance on this site or its results.
We may update these terms at any time. Continued use after changes constitutes acceptance of the new terms.