What Is My Port Number?Posted on 13th May 2021
Many people don’t see any difference between their IP address and port number. If you are one of those who doesn’t give it a clue, you should know that knowing your port number is crucial to access some games or configure firewalls. Regardless of your OS, you will be able to find out your port number after reading the guide below.
Find your port number easily
Port number for Windows users :
- Type “cmd” in the search box to open Command Prompt;
- In the prompt, enter “ipconfig”. It helps to find out more about your IP address. Your public IP may not be seen when the user is behind the router. Instead of that, you might see the IP of the router. Go to What is my IP and get the information about your public IP address;
- Put in “netstart-a” and you will see the numbers of ports and list of connections being used right now. It might take up to ten minutes, so be patient.
Port number for Mac users:
- Click on the Apple icon, and you will see System Preferences;
- Click to Network;
- Pick the necessary network and go to Advanced;
- Open the tab of Port Scan;
- Type the IP address you are going to scan and if you don’t know it, click What is my IP.
The definition of a Port Number
For you to understand it better, a port number is how a certain message is identified when being sent to a web server. Each IP address has over 65 thousand ports. A specific designation is referred to just one or a couple of them. It will be a UDP or TCP port depending on the type of server.
UDP and TCP
Transmission Control Protocol or TCP sends the data after the connection is being established. It is a more reliable protocol for transferring data.
User Diagram Protocol or UDP sends data without a connection. For that reason, it is much faster and more lightweight than TCP. When using it, you don’t even have to establish a connection with the TCP details.
A Port Number vs. IP Address
A number of devices complete a computer network. What are those devices? You know them well — printers, routers, webcams, laptops, etc. They all share the resources, data and are connected with one another.
The IP address or internet protocol is a unique label allocated to each of those devices. The IP address does the following:
- Identification of host or network;
- Addressing a location.
A port number, in turn, is cooperating with the IP address and directing traffic on a network. This traffic is being directed to a specific destination. It optimizes performance or gives access when it comes to a web server. If the port of the web server is closed, no one will be able to connect to you.
Frequently Asked Questions
Find answers to your possible questions below.
Why is it necessary to know my port number?
Port numbers are necessary for the configuration of security firewalls on any of the devices on any OS. You can also sort out IP addresses ranging from SMTP (mail service), FTP (file transfer), and HTTP (web service). By knowing your port number, you can be aware of the incoming port to receive or send encrypted data. Your online security will also be increased, and your private data won’t be disclosed to anyone.
What is an IP address?
This is your address on the internet. Just like you have a factual address where you live, you have your address on the Internet.
What kind of IP addresses there are?
You can distinguish two types of the IP addresses such as public and private ones. Your device is allocated a private address by your router, while your ISP gives your public address. Thanks to it, you can explore the Internet.
How to check my IP address?
If you use a special IP-looking tool, you will see your IP address. Such tools show your public IP, location, OS, and ISP.
How to figure out the port number of an IP address?
Open your Command Prompt and type “netstat-a,” click Enter. See your active TCP links. Your port number will be separated from your IP address by a colon.
What is a port scanner necessary for?
A port scanner is an app probing a server or a host for open ports. Administrators often verify the network security policies and whether the ports are closed. Hackers also widely used these apps to identify open ports and notice vulnerable places.
How to check whether my port is open?
You can install any port checking tool from the Internet. They allow you to see your public IP address and whether any open ports are associated with it. It also will help you check whether your port is set up properly and whether the firewall is moving in the right direction.