Enter an IP address or hostname and a port number to check if the port is open. This tool helps diagnose network connectivity issues and verify service availability. Ensure your website’s security by verifying its SSL certificate easily with this tool. IP Address or Hostname Enter the IP address (IPv4 or IPv6) or hostname to check. Port Number Enter the port number to check (e.g., 80 for HTTP, 443 for HTTPS, 22 for SSH). Bookmark this tool