About IPv4 Subnet Calculator
Niuma Tools Dedicated to improving the daily efficiency of professionals and frontend developers. This is a ready-to-use, secure, and highly efficient productivity tool. Professional online IPv4 subnet calculator. Input IP and mask to calculate usable IP range, network size, broadcast, binary mask, and IP class, with block paging.
Usage Notice & Privacy Guarantee
We have always adhered to the core development philosophy of "Offline First, Security First". Many features on this page are implemented through the local computing APIs of modern browsers, effectively solving the unpredictable privacy leakage risks faced when sending files and data to other websites. You can save it to your bookmarks as a solid and reliable part of your daily development, testing, or content creation workflow.