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Subnet Calculator
Network, broadcast, mask and host count from IP/CIDR.
Enter your details
Results
Network Address
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Broadcast
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Subnet Mask
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Usable Hosts
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How to use the Subnet Calculator
Enter an IPv4 address and CIDR prefix for network, broadcast, mask and usable host count.
Frequently Asked Questions
Network and broadcast addresses can't be assigned to devices — that's the −2.