Calculate network range, broadcast address, and usable IPs from CIDR.
Free online IPv4 Subnet Calculator. Calculate network ranges, subnet masks, CIDR notation, and usable IP addresses. Essential for network engineers and IT professionals.
Enter an IP address (e.g., 192.168.1.1).
Enter the CIDR suffix (e.g., 24) or Subnet Mask.
The tool automatically calculates network details.
View the Network Address, Broadcast Address, and Host Range.
Classless Inter-Domain Routing (CIDR) is a method for allocating IP addresses and IP routing. It replaces the older classful network design.
A /24 subnet has 256 total IP addresses, but 254 are usable for hosts (one for network address, one for broadcast).