About This Tool
Calculate IPv4 subnet information from an IP address and CIDR notation or subnet mask. Get network address, broadcast address, usable host range, and more.
How to Use
- Enter an IP address (e.g., 192.168.1.0)
- Enter CIDR notation (/24) or subnet mask (255.255.255.0)
- Click Calculate to see all subnet details
FAQ
What is CIDR notation?
CIDR (Classless Inter-Domain Routing) notation like /24 represents the number of network bits in the subnet mask. /24 equals 255.255.255.0.