IPv4 Subnet Calculator

Calculate an IPv4 network address, subnet mask, broadcast address and host count from CIDR.

Your numbers

IPv4 addressCIDR prefix

🧠 TUTORCALC EXPLAINS

Understand your result

IPv4 subnet planning

CIDR prefixes define how many bits identify the network. A larger prefix means a smaller address block. Special-purpose networks and point-to-point links can follow rules different from traditional host counting.