Enter an IPv4 address
Type a prefix (for example /24) or a dotted netmask. The calculator keeps both values in sync automatically.
Subnet details
Why use an IPv4 subnet calculator?
Plan networks faster
Instant CIDR conversions help engineers design VLANs, VPNs and VPC subnets without manual math.
Avoid addressing errors
Seeing broadcast, wildcard and host ranges in one place prevents overlaps when provisioning routers or firewalls.
Document deployments
Pair this IPv4 calculator with ChilamVPN to describe each tunnel, subnet mask and host budget in your runbooks.
Benefits
Simple self-service
Register users and devices in minutes with an intuitive web interface. Download ready-to-use configurations and connect without IT support.
Strong security
Built on next-generation VPN technology with modern cryptography and optimized performance to guarantee encrypted connections.
No extra hardware
Connect to your systems without physical firewalls or public IP addresses. Everything is provisioned automatically in the cloud.
Scalable and flexible
Add devices and users, extend your connections across regions, and manage access from a streamlined admin panel.
How it works
Request your account
Sign in securely to the platform. Each user receives a personal dashboard and unique keys.
Download the configuration
Automatically generate your VPN configuration file and a QR code to import it on your devices.
Connect your teams
Activate the connection and start linking your systems and business units through our secure network.
Responsible use
ChilamVPN is designed to securely connect corporate sites and systems. We do not provide VPN services for anonymous browsing or bypassing geographic restrictions; our priority is reliable connectivity and policy compliance.