IP Subnet Calculator
Calculate network address, broadcast, usable hosts, wildcard mask, IP class and binary representation. Supports CIDR notation from /1 to /32 — 100% client-side, free and instant.
About This Tool
- 100% client-side — no data sent to any server
- Shows binary representation of IP and subnet mask
- Supports all CIDR prefix lengths from /1 to /32
- Completely free with no registration or limits
Frequently Asked Questions
A subnet calculator is a tool that takes an IP address and a subnet mask (CIDR notation) and calculates the network address, broadcast address, range of usable host IPs, wildcard mask, and other network details. It helps network administrators plan and manage IP address allocation.
CIDR (Classless Inter-Domain Routing) notation is a compact way to represent an IP address and its associated network mask. For example, 192.168.1.0/24 means the first 24 bits are the network portion, leaving 8 bits for host addresses (254 usable hosts).
Private IP addresses are reserved for internal networks and are not routable on the public internet. The three private ranges are: 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16. This calculator automatically detects whether an IP is private or public.
Yes! VUREX IP Subnet Calculator is completely free. All calculations happen instantly in your browser with no server requests. No registration, no limits — use it as much as you need.