IP Subnet Calculator
Calculate IPv4 subnet details from an IP address and subnet mask. Get network, broadcast, usable range, and more.
Subnet Details
Subnetting Tips
What is a Subnet?
A subnet divides a network into smaller, more efficient segments. Subnetting helps manage and secure IP networks.
CIDR & Masks
CIDR notation (e.g. /24) is equivalent to a subnet mask (e.g. 255.255.255.0). /24 allows 256 addresses, 254 usable hosts.
Quick Facts
Class A: /8, Class B: /16, Class C: /24. Private IPs: 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16.