Port Scanner - Check Port Status (TCP & UDP Ports)
Our online port checker tool is a free resource that helps you identify what ports are open and running services on a network. With our port tester, you can also identify closed ports that are not running any service and are not accepting traffic.
This open port scanner tool is designed to provide accurate results. Using our open port check tool, users can receive multiple forms of assistance. For example:
- DevOps can confirm that a service restart actually made the port reachable.
- Networking professionals can verify whether port forwarding is enabled on the routers.
- Online businesses can utilize it for remote management access and troubleshooting.
How to Check Open Ports With Our Port Tester?
Follow the steps below to check if port is open or closed using our tool:
- Open our port checker tool.
- Enter a domain/hostname or a public IP address inside the provided field.
- In the “Port Types” section, select from the following.
- Custom: Enter any specific port number you want to test for accessibility.
- Game: Check if your game's required ports are open for smooth online play.
- Server: Test ports commonly used by web, mail, or FTP servers to ensure proper connectivity.
- Application: Verify if ports used by desktop or mobile applications are accessible through your network.
- P2P Ports: Check if ports used by peer-to-peer services like torrents are open for file sharing.
- If you want to check ports of your choice, then go with “Custom” and write all the port numbers separately with a comma.
- Alternatively, you can also look to the right and click on the “Scan All Ports” option to automatically add all ports to the list.
- Click on the “Check” button to scan the ports.
After a few seconds, you will be provided a table that shows which ports are open or closed. You can download or copy the results using the on-screen shortcuts.
What Results Do You Get With Our Port Scanner?
When you check port status using our online port scanner, it provides instant results in a table format. The table has three columns that indicate the port title, port number, and its status.
Regarding the status, you will see two types of results:
- Open:Means that the port number is open and running services.
- Timed Out: This means that the port is closed and not accepting traffic.
Why Do You Need to Use an Open Port Checker?
This tool is useful for a variety of reasons. Here’s why someone may needs to use it.
- Diagnosing connectivity issues: Some applications require specific ports to be open to work. This can include server software, browsers, and streaming apps. For example, ports 80/443 need to be open to accept browser traffic. If they are closed, you won’t be able to access any website.
- For Network Security: All ports in a network that are open will accept any traffic without any checks. So, security experts have to scan all open ports and close the ones that are unnecessary. This helps lock down methods of attack.
Frequently Asked Questions (FAQs)
What are common port numbers?
Common port numbers used almost daily by your device are:
- Port 80 – Handles HTTP traffic (regular website access)
- Port 443 – Used for HTTPS traffic (secure, encrypted websites)
- Port 25 – Manages SMTP traffic (sending emails)
- Port 53 – Supports DNS traffic (translating domain names to IP addresses)
- Ports 20 & 21 – Facilitate FTP traffic (file transfers between devices)
There are more, but these are the main ones.
What are the prerequisites for checking ports?
You can only check the ports of a device if its IP address is accessible. So, essentially, you are limited to checking the ports of public websites and devices on your local network whose private IP addresses are known to you.