Browser-local network math

IP Subnet Calculator

Enter IPv4/CIDR, such as 192.168.1.1/24. The tool calculates network address, broadcast address, subnet mask, usable IP range, and host count locally in your browser.

Local

Input

CIDR
Supports IPv4 addresses and CIDR prefixes from 0 to 32. You can also enter only an IP and fill the prefix separately below.

Enter IPv4/CIDR and the results will update live.

Results

Live
Network address
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Broadcast address
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Subnet mask
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Usable IP range
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Usable host IPs
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Total addresses
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Wildcard mask
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Normalized CIDR
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Network address binary
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This IP/CIDR subnet calculator is built for network engineers, DevOps teams, cloud administrators, and developers. After you enter an IPv4 address and prefix length, the page uses plain browser JavaScript to run binary network math and show the network address, broadcast address, subnet mask, usable IP range, usable host count, total addresses, wildcard mask, and binary network address. All input remains in the current page and is never uploaded to a server.

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