IPv4 Subnet Calculator
Explore IPv4 subnetting by calculating network addresses, subnet masks, and usable host ranges.
IPv4 Subnet Calculator
Enter an IPv4 address and a CIDR prefix length.
Calculation Results
- Network Address
- Subnet Mask
- Broadcast Address
- First Usable IP
- Last Usable IP
- Usable Hosts
/31 is treated as a point-to-point network. /32 represents a single host route.