The IP Subnet Calculator is a powerful, browser-based tool that helps network engineers, IT professionals, and students calculate subnet details for both IPv4 and IPv6 addresses. Whether you’re configuring routers, planning address allocations, or studying for certifications, this dual-purpose calculator provides instant results for:

• Network and broadcast addresses
• Usable host ranges
• Subnet masks and prefix lengths
• Host capacity and CIDR breakdowns

Simply enter your IP address and prefix, and the tool will handle the rest—no downloads or command-line tools required.