Calculate network address, broadcast, host range and more from CIDR notation
| CIDR | Subnet Mask | Hosts | Class |
|---|
Subnetting divides a large IP network into smaller, more manageable segments. CIDR (Classless Inter-Domain Routing) notation like 192.168.1.0/24 specifies the network prefix length — the number of bits used for the network portion of the address. The remaining bits identify individual hosts. A /24 subnet provides 254 usable hosts, while a /16 provides 65,534. Network engineers use subnet calculators daily for IP address planning, firewall rule configuration, VLAN setup, and cloud infrastructure provisioning (AWS VPCs, Azure VNets). This tool calculates network address, broadcast address, host range, subnet mask, and wildcard mask from any IPv4 CIDR block.