IP Subnet & CIDR Calculator
⚠️ Invalid IP Address Format. Please enter a valid IPv4 address.
Network Address
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Broadcast Address
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Subnet Mask
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Usable Hosts
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Usable Host Range
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How to use this IP Subnet Calculator? Our free CIDR calculator helps Network Administrators and IT Students quickly determine network addresses, broadcast addresses, subnet masks, and usable host ranges. Simply enter your IPv4 address and select the routing prefix (CIDR notation from /1 to /32) to instantly view the calculated network configuration. Perfect for configuring routers, firewalls (like Sophos), and VPCs in cloud environments.