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Port Checker

Check if a TCP port is open (example: 80, 443, 22, 3306).

Note: Some servers block outgoing connections. If results seem wrong, your hosting firewall may be filtering.

About Port Checker

Port Checker helps you test whether a specific TCP port is open or closed on an IP address or domain. Ports are communication endpoints used by network services such as web servers, mail servers, FTP, SSH, and game servers. This tool is helpful when troubleshooting connection issues, firewall settings, NAT rules, server accessibility, and hosting setups.

Common Ports Examples

  • 80: HTTP Website
  • 443: HTTPS Website
  • 22: SSH Remote Access
  • 21: FTP
  • 25: SMTP Mail Server

How to Use

  1. Enter a domain or IP address
  2. Enter the port number you want to check
  3. Click Check Port to see open/closed status

FAQ

Why a port may show “closed”?
A firewall may block it, the service may be stopped, or the network may not allow outside connections.

Is this tool a hacking tool?
No. This tool is for troubleshooting your own servers and verifying connectivity for legitimate purposes.

📘 Quick Guides
What is an IP address?
An IP is a network identity used for routing traffic. Lookup helps detect ISP, ASN and region.
Why DNS matters?
DNS records control your website and email routes. Wrong records can break access instantly.
CIDR & Subnet basics
CIDR defines IP blocks like /24. Subnet tools help calculate range and usable hosts.