IP & CIDR Calculator
Calculate network details, subnets, and host ranges for IPv4 addresses.
Understanding CIDR Notation
CIDR (Classless Inter-Domain Routing) is a method for allocating IP addresses and IP routing. It replaces the older system of classes (A, B, C).
Common Subnets
- /24: Common home network (254 usable hosts)
- /30: Point-to-point links (2 usable hosts)
- /16: Large corporate network (65,534 usable hosts)