IPv4 Subnet Calculator
IP Address
CIDR Prefix
⚠ Please enter a valid IPv4 address (e.g. 192.168.1.0)
Subnet Summary
Network Address
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Broadcast Address
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Usable Hosts
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IP Class
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Full Details
| IP Address | — |
| Network Address | — |
| Subnet Mask | — |
| Wildcard Mask (Cisco ACL) | — |
| Broadcast Address | — |
| First Usable Host | — |
| Last Usable Host | — |
| Total Addresses | — |
| Usable Host Addresses | — |
| CIDR Notation | — |
| IP Class | — |
| Private Range | — |
Binary Subnet Mask
CIDR Quick Reference
| CIDR | Subnet Mask | Wildcard | Total IPs | Usable Hosts | Common Use |
|---|
💡 Click any row to calculate that CIDR using your entered IP address. Rows with * have special host rules.