Network Address Calculator
Enter any IP address with a subnet mask or CIDR prefix to instantly calculate the network address (Network ID) for your subnet. Determine which network segment a host belongs to, verify network boundaries, and get the broadcast address and host range — critical for routing table analysis and subnet troubleshooting. Run the vlsm calculator to generate a VLSM plan that fits multiple subnet sizes into a single address block without overlap.
Input
Network Address Result
Binary Calculation (IP AND Mask = Network)
What is a Network Address?
The network address (also called Network ID) is the first address in a subnet and identifies the network itself. It's calculated by performing a bitwise AND operation between the IP address and subnet mask.
The network address cannot be assigned to any host device - it's reserved to identify the network. Similarly, the broadcast address (last address in the subnet) is also reserved.
Related Network Tools
Explore these related tools for subnet calculation and IP address management. The fastest way to calculate subnet mask is to enter a CIDR prefix and get the dotted-decimal mask, wildcard mask, and host count.
Additional networking calculators for IP address planning and network analysis. The ip address validator validates both IPv4 dotted-decimal and IPv6 colon-separated formats in a single check.