Back to Home

CIDR Calculator

Enter an IPv4 address and prefix (e.g., 10.0.0.1 and 24) then click Calculate.

Property Value

Calculate first, then choose a target prefix to list blocks inside the CIDR.

CIDR First Last Usable Hosts

Calculated addresses appear here. Large ranges are paginated; use CSV for very large blocks.

# IP Role

Visualizes network and host bits for the CIDR.