How To Check If A Port Is Open Windows

Possibly y'all're troubleshooting a network connectivity result for a specific plan, and you need to check whether its port access is open. What if you need to check if your NAS device can communicate with your Windows 10 PC? Whatever the reason you need to look for open ports, this article provides detailed steps to check them on Windows 10 using several readily available tools, either built-in or free to download and apply.

How to Check Which Ports Are Open on a Windows 10 PC

In that location are a couple of handy tools you can use to scan open ports in Windows. You'll come across how to do and then on NetStat, PortQry.exe, and NirSoft CurrPorts.

Using NetStat to Bank check for Open up Ports in Windows 10

I of the simplest ways to bank check for open ports is to use NetStat.exe. You can find this tool in the "System32" binder on Windows 10. With NetStat, you lot can see open ports or ports that a specific host uses.

Ii commands are helpful, depending on your needs. The first choice (netstat -ab) lists all active ports and the proper noun of the process that uses them. The second option (netstat -aon) additionally provides a procedure ID you can later search for in the Task Director.

Netstat is short for network statistics. It shows protocol statistics and the current TCP and IP network connections. Here'due south an explanation of what each letter from the commands means.

"a" displays all connections and listening ports.
"b" shows all executables that are involved in creating each listening port.
"o" provides the owning procedure ID that is related to each of the connections.
"n" shows the addresses and port numbers as numericals.

Using 'netstat -ab' to Identify Open up Ports

In the Cortana Search Bar, type "cmd" without quotes, then select "Run equally ambassador."
At present, type "netstat -ab" without quotes, then printing "Enter."
Await for the results to load. Port names go listed side by side to each local IP address.
Look for the port number yous demand, and if it says LISTENING in the State column, information technology means your port is open.

Using 'netstat -aon' to Place Open Ports

The 2d pick comes in handy when "netstat -ab" isn't enough to identify what program has a specific port tied upwardly. In that case, follow these steps:

In the Cortana Search Bar, blazon "cmd" without quotes, and then select "Run as administrator" if it is not already opened.
One time inside, type the control "netstat -aon" without quotes and printing "Enter."
Y'all will now see v columns: Protocols, Local Address, Foreign Address, State, and PID (Process ID). In the Local Address, yous take a port number. For example: 0.0.0.0:135. Here, 135 is the port number.
In the column called State, you will run across whether a specific port is opened. For opened ports, it volition say LISTENING.
To verify which app uses a item port, find the PID (the number from the last column) for a specific port.
Open the "Task Director" by pressing "Ctrl + Shift + Esc."
Go to the "Details" or "Services" tab to see all processes on your Windows 10 system. Sort them by the PID column to find the PID for the port you're trying to troubleshoot. You tin see which app uses the port in the Description section.

Checking for Open up Ports with NirSoft CurrPorts

If you notice the Command Prompt solution also catchy, a simpler alternative is to use NirSoft CurrPorts. This tool displays your currently opened ports (TCP or IP as well as UDP). Yous'll besides come across information nearly a specific process such as name, path, version info, etc.

This tool has been around for quite a while and is bachelor for Windows x. You tin find the NirSoft Currports download link at Nirsoft'due south website towards the bottom.

Notation: Ensure you download the correct version. They have 32-fleck and 64-scrap versions. The app is portable. Simply unzip the binder, then run the executable file.

In one case you have CurrPorts running, perform the post-obit steps:

You'll see a listing of your computer processes. Sort them by "Local Port" to search through them more hands.
Now, find and select the port yous are troubleshooting.
You can now run into all the process' details such equally its Process Name, Process ID, State, etc.

Another mode is to simply double-click on a process to meet its details in a single window.

Checking for Open Ports Using PortQry.exe

PortQry.exe is another handy tool that lets you scan open up ports. Y'all download PortQry and excerpt it to run it through the Command Prompt. You can as well download PortQryUI every bit an improver if yous don't want to employ the command line, which is a Graphical User Interface (GUI) for PortQry.

With portqry.exe, you lot insert specific parameters that you notice in the executable'due south folder.

How to Run PortQry.exe using Command Prompt

Download PortQry, and then unzip the files to your chosen location. The default is "C:\" simply tin can be changed if desired.
If in the default directory, blazon cd c:\PortQryV2\ in the Command Prompt to set the location of the executable file.
If in a custom directory, type cd [drive letter]:\[folder1]\[folder2]\ but replace all content in the square brackets with bodily names. Include all folders needed.
Type portqry.exe -local to launch it. This command displays used TCP and UDP ports for a local host.
In addition to all parameters that NetStat displays, Portqry also shows you a number of port mappings as well as the number of ports in each state.
Y'all tin can likewise check for open ports for a remote host. Just run portqry.exe -n [hostname/IP] in the Command Prompt. Ensure you replace the hostname and IP by the remote host's name and IP address.
If you want to await for a specific port, you tin also add -e [port_number] to the comand line.

How to Run PortQry.exe using the UI Improver

For those that adopt to use a graphical interface instead of commands when using PortQry.exe, Microsoft offers an add-on named PortQryUI.

The PortQryUI add-on already includes the necessary version of PortQry, so you don't need both downloads to use it.

Download PortQryUI, so unzip the files to your called location. The default is "C:\" but can be changed if desired.
Launch "Windows Explorer" and navigate to the PortQryUI.exe file location, so click it to launch the UI.
To view TCP and UDP ports for the local host (your PC), leave the Destinatrion IP every bit 127.0.0.one and then information technology passes through the network's devices and configuration settings (network card, router's config, etc.) and not just read from the local PC.
To view all TCP and UDP ports, click on "Manually input query ports," then type "i-65535" in the "Ports to query" section. Also, select "TCP," "UDP," or "Both" from the "Protocol" dropdown.
To filter your listing of TCP/UDP ports, click on "Query predefined service," then choose which service to query. You can just select one at a time.
You can also bank check a remote host past changing the FQDN or domain in the query box at the top.
If you lot want to bank check a specific port, enter the number in "Ports to query."

Configuring Open Ports in Windows x

Knowing how to check whether a specific port is open or not can come in handy if you're troubleshooting a program's network connectedness. Luckily, there'southward an like shooting fish in a barrel way to exercise that.

We recommend using NetStat via Control Prompt as it'southward built into the Bone and usually gives you all the details you lot need. In that location might be a few extra steps required compared to CurrPorts, merely y'all don't have to download anything.

Windows 10 Open up Ports FAQs

How do I check if Port 3306 is open in Windows 10?

To verify if port 3306 is open, you have two options: the first i is via NetStat, and the 2nd ane is via CurrPorts.

Nosotros recommend NetStat, as you won't have to download new software for this. Run the Command Prompt as administrator. Type the command: "netstat -ab" and hit "Enter." Expect for the results to load. Port names will exist listed side by side to the local IP address. Just wait for port 3306. You can press "Ctrl + F" and type "3306" in the give-and-take box to search for it. If the port is open, it will show in the results every bit "LISTENING."

To bank check if port 3306 is open via CurrPorts, just sort by "Local Port," then discover port 3306. If the port is available, it will testify in the listing.

To use PortQry.exe to observe port 3306, use the Command Prompt. Type "-eastward [3306]" without quotes, then press Enter.