Subnet & CIDR Calculator
Enter any IP address and prefix length. Get network info, host ranges, binary breakdown, and a plain-English explanation of what the mask actually means.
IP Address / Prefix
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Network Address
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Broadcast Address
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Subnet Mask
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Wildcard Mask
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First Usable Host
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Last Usable Host
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Usable Hosts
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IP Class
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Binary breakdown, ■ network bits ■ host bits
// why this mask
CIDR Quick Reference
| Prefix | Subnet Mask | Usable Hosts | Networks in Class C | Common Use |
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