Subnet Calculator
Calculate IPv4 and IPv6 network addresses, broadcast addresses, host ranges, subnet masks and more — instantly in your browser.
IP Address / CIDR
Enter an IP address with CIDR prefix (e.g. 192.168.1.0/24) or an IP with a separate subnet mask.
or
IPv6 Address / Prefix
Enter an IPv6 address with prefix length (e.g. 2001:db8::/32 or ::1/128).
Quick Reference — Common Subnet Masks
| Prefix | Subnet Mask | Wildcard | Total Hosts | Usable Hosts | Common Use |
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