Subnet Calc Pro

Subnet Calc Pro is a professional subnet calculator and IP planning app for IT, networking, and business operations. Enter an IPv4 or IPv6 address or CIDR and get the network, usable range, broadcast, and host count in real time. Plan address space with VLSM and CIDR, split or merge subnets by required hosts, and preview conflicts before deployment. Export results to CSV or clipboard, save templates, and optionally sync across devices. It is fast, accurate, offline-capable, and easy to use, ideal for network engineers, system administrators, DevOps, and students who need reliable subnetting. Keywords: subnet calculator, IP subnetting, CIDR, IPv4, IPv6, network planning, IT tools, business utility.