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. The subnet mask tool includes a full reference table showing all valid IPv4 subnet masks and their corresponding CIDR prefixes.
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 ip binary converter shows the binary representation of each octet so you can verify subnet masks and subnetting calculations.
Additional networking calculators for IP address planning and network analysis. Use the broadcast address calculator to confirm the broadcast address when troubleshooting ARP and directed broadcast behaviour on a LAN.