$
network-calc 192.168.1.100/24
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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.
Input
Network Address Result
Network Address (Network ID)
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Input IP
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Subnet Mask
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CIDR Notation
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Broadcast
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Host Range
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Usable Hosts
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Binary Calculation (IP AND Mask = Network)
IP Address
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Subnet Mask
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Network (AND Result)
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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.