Enter any IPv4 address and CIDR prefix (or subnet mask) to instantly calculate the full subnet breakdown — network address, broadcast, usable host range, wildcard mask, and more.
IPv4 Subnet Calculator
CIDR Prefix Length
Subnet Mask Bits
Subnet Results
Binary View
Network bits = green Host bits = red
Common Subnet Reference Table
| CIDR | Subnet Mask | Hosts | Wildcard |
|---|
Check your IP → IP Address Info Convert bytes → Byte Converter DNS records → DNS Record Guide