This webpage helps you understand and calculate IPv4 address ranges using simple math and clear explanations. It is designed for learners, pentesters, and networking beginners who want to see how IP ranges actually work instead of memorizing formulas.

A modern, interactive IPv4 subnet calculator built for learners and pentesters. This web app calculates network addresses, broadcast addresses, usable host range, block size, and more, while explaining each step so you understand why the calculations work.