Enter an IPv4 address and mask or CIDR prefix to calculate the network address, broadcast address, host range and subnet size. The calculator helps with router, firewall, VPN and infrastructure documentation tasks.
Use it for quick address plan checks, subnet splitting and explaining network parameters without opening a command line.
✓Calculate IPv4 network address, broadcast address and host range.
✓Use CIDR prefix or subnet mask depending on your workflow.
✓Helpful for routers, firewalls, VPNs, hosting and documentation.
✓Avoid manual subnet math mistakes when planning address ranges.
✓Use the calculated ranges when planning networks, firewall rules and address allocation.
✓The tool helps avoid mistakes when you split IPv4 networks into smaller subnets.
