What is an open port check?

An open port check is a test that determines whether a specific port on your device or network is accessible from the internet. It helps identify whether a service is available or blocked by a firewall.

How do I check if a port is open?

You can check if a port is open by entering your public IP address or domain name on OpenPortCheck.org and clicking 'Check'. The tool will test common ports and report which ones are open or blocked.

Do I need to include http or https in the address?

No, for accurate results please enter only the domain name, such as example.com. Do not include 'http://' or 'https://'.

Is it safe to check open ports online?

Yes, OpenPortCheck.org is a secure and private tool. It only checks the availability of common ports and does not store or share any data.

Which ports does the tool check?

The tool checks 29 of the most commonly used and potentially vulnerable TCP ports, including 21 (FTP), 22 (SSH), 80 (HTTP), 443 (HTTPS), 3389 (RDP), and others.

Open Port Checker

Host / IP:

Check My IP

Top-Checked Ports:

Port:

"Welcome to OpenPortCheck.org!
By using the Open Port Checker, you can quickly determine which ports on your network are open or closed."

Open Port Checker

OpenPortCheck.org is a free and fast tool to instantly check open ports on your IP address or domain. It helps you verify port availability and determine whether a specific port is open or blocked from the internet.

Why Use an Open Port Checker?

Knowing whether a port is open is essential for many tasks like hosting a game server, setting up remote desktop, configuring web servers, or troubleshooting firewalls. Our tool allows you to check if your router or firewall is blocking connections to specific ports.

How It Works

When you enter your public IP or domain, our system sends a request to connect to a selection of the most commonly used ports. It returns real-time results showing whether each port is open, closed, or filtered.

Key Features

✅ Quickly check if your port is open from the internet
✅ No software installation or login required
✅ Useful for checking game servers, P2P, FTP, RDP, SSH, and HTTP/S services
✅ Works in all browsers and devices

Available Ports to Check:

20 – FTP (File Transfer Protocol)
21 – FTP (File Transfer Protocol)
22 – SSH (Secure Shell)
23 – Telnet (Remote Login Service)
25 – SMTP (Simple Mail Transfer Protocol)
53 – DNS (Domain Name System)
80 – HTTP (Hypertext Transfer Protocol)
110 – POP3 (Post Office Protocol 3)
115 – SFTP (Secure File Transfer Protocol)
123 – NTP (Network Time Protocol)
143 – IMAP (Internet Message Access Protocol)
161 – SNMP (Simple Network Management Protocol)
194 – IRC (Internet Relay Chat)
443 – SSL/HTTPS (Hypertext Transfer Protocol Secure)
445 – SMB (Server Message Block)
465 – SMTPS (Simple Mail Transfer Protocol over SSL)
554 – RTSP (Real Time Streaming Protocol)
873 – RSYNC (File Transfer Services)
993 – IMAPS (Internet Message Access Protocol over SSL)
995 – POP3S (Post Office Protocol 3 over SSL)
3389 – RDP (Remote Desktop Protocol)
5631 – PC Anywhere
3306 – MySQL
5432 – PostgreSQL
5900 – VNC (Virtual Network Computing)
6379 – Redis
8333 – Bitcoin
11211 – Memcached
25565 – Minecraft

Simply enter your IP or domain and click “Check” to get started. For best results, do not include "http://" or "https://" — just type the domain (e.g., example.com).