Our port checker tool helps you see if a specific port on your network is open or closed. Whether you're setting up a server, troubleshooting a firewall issue, or verifying remote access settings, this port scanner gives you instant answers.
What is a Port Checker?
An open port tester is a tool that can check a port on a device or a website using its IP address or domain name. The test determines whether specific ports on the device are open or closed. This information is crucial for network security experts.
How to Use Our tool to Check Open Ports?
To use our tool, follow the steps below.
- Open a browser and enter this URL in the address bar: https://macaddresslookup.io/port-checker.
- In the new web page, look for the “Domain/IP Address” section. Enter the IP address of the device or the domain name of a website you want to check into the “Domain/IP Address” section
- 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.
Explanation of Results of the Port Tester
The results on performing and open port check are quite simple to understand. All the results are given in the form of a table. Each port has its own row, which states the outcome.
There are just two possible outcomes.
- Open: This means that the port is open and accepting the relevant traffic.
- Timed Out: This means that the port is closed and not accepting traffic.
That’s all the results section will show.
Why Do You Need to Use an Open Port Scanner?
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.