Privacy

Prefix math runs in your browser. The site does not send the address you type to an application API, and it does not keep an account or a calculation history.

Share links store the address and prefix in the query string, for example ?ip=192.168.1.10&prefix=24. Opening that link requests the URL from the host, so the address is visible to the network path, to server logs the host keeps, and to anyone you send the link to. Canonical pages stay on the clean path. Query variants are not separate indexable pages.

Ahrefs and Seline load on each page and record the visit. They receive the URL you open. On a share link, that URL includes the address and prefix in the query string. Events prepared in the page stay categorical: which tool ran, whether validation failed, and whether a result was copied. Those events do not include raw addresses, ranges, or full share URLs.

The theme choice is stored in local storage on this device.