Which of the following is the command used to display currently open ports on a Windows operating system?

How do I find out which process is listening on a TCP or UDP port on Windows?

Mateen Ulhaq

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asked Sep 7, 2008 at 6:26

readonlyreadonly

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13

PowerShell

TCP

Get-Process -Id (Get-NetTCPConnection -LocalPort YourPortNumberHere).OwningProcess

UDP

Get-Process -Id (Get-NetUDPEndpoint -LocalPort YourPortNumberHere).OwningProcess

cmd

 netstat -a -b

(Add -n to stop it trying to resolve hostnames, which will make it a lot faster.)

Note Dane's recommendation for TCPView. It looks very useful!

-a Displays all connections and listening ports.

-b Displays the executable involved in creating each connection or listening port. In some cases well-known executables host multiple independent components, and in these cases the sequence of components involved in creating the connection or listening port is displayed. In this case the executable name is in [] at the bottom, on top is the component it called, and so forth until TCP/IP was reached. Note that this option can be time-consuming and will fail unless you have sufficient permissions.

-n Displays addresses and port numbers in numerical form.

-o Displays the owning process ID associated with each connection.

answered Sep 7, 2008 at 6:28

Brad WilsonBrad Wilson

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21

There's a native GUI for Windows:

• Start menu → All Programs → Accessories → System Tools → Resource Monitor

• or run resmon.exe,

• or from TaskManager → Performance tab.

answered May 18, 2014 at 5:02

10

For Windows:

netstat -aon | find /i "listening"

xash

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answered Sep 7, 2008 at 6:32

akuaku

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Use TCPView if you want a GUI for this. It's the old Sysinternals application that Microsoft bought out.

answered Sep 7, 2008 at 6:38

DaneDane

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The -b switch mentioned in most answers requires you to have administrative privileges on the machine. You don't really need elevated rights to get the process name!

Find the pid of the process running in the port number (e.g., 8080)

netstat -ano | findStr "8080"

Find the process name by pid

tasklist /fi "pid eq 2216"

Jaywalker

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answered Jan 24, 2018 at 3:50

Ram SharmaRam Sharma

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You can get more information if you run the following command:

netstat -aon | find /i "listening" |find "port"

using the 'Find' command allows you to filter the results. find /i "listening" will display only ports that are 'Listening'. Note, you need the /i to ignore case, otherwise you would type find "LISTENING". | find "port" will limit the results to only those containing the specific port number. Note, on this it will also filter in results that have the port number anywhere in the response string.

answered Oct 8, 2013 at 18:56

Nathan24Nathan24

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1. Open a command prompt window (as Administrator) From "Start\Search box" Enter "cmd" then right-click on "cmd.exe" and select "Run as Administrator"

2. Enter the following text then hit Enter.

   netstat -abno

   -a Displays all connections and listening ports.

   -b Displays the executable involved in creating each connection or listening port. In some cases well-known executables host multiple independent components, and in these cases the sequence of components involved in creating the connection or listening port is displayed. In this case the executable name is in [] at the bottom, on top is the component it called, and so forth until TCP/IP was reached. Note that this option can be time-consuming and will fail unless you have sufficient permissions.

   -n Displays addresses and port numbers in numerical form.

   -o Displays the owning process ID associated with each connection.

3. Find the Port that you are listening on under "Local Address"

4. Look at the process name directly under that.

NOTE: To find the process under Task Manager

1. Note the PID (process identifier) next to the port you are looking at.

2. Open Windows Task Manager.

3. Select the Processes tab.

4. Look for the PID you noted when you did the netstat in step 1.

   • If you don’t see a PID column, click on View / Select Columns. Select PID.

   • Make sure “Show processes from all users” is selected.

answered Nov 8, 2012 at 1:49

CyborgCyborg

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Get PID and Image Name

Use only one command:

for /f "tokens=5" %a in ('netstat -aon ^| findstr 9000') do tasklist /FI "PID eq %a"

where 9000 should be replaced by your port number.

The output will contain something like this:

Image Name                     PID Session Name        Session#    Mem Usage
========================= ======== ================ =========== ============
java.exe                      5312 Services                   0    130,768 K

Explanation:

• it iterates through every line from the output of the following command:

  netstat -aon | findstr 9000
  

• from every line, the PID (%a - the name is not important here) is extracted (PID is the 5th element in that line) and passed to the following command

  tasklist /FI "PID eq 5312"
  

If you want to skip the header and the return of the command prompt, you can use:

echo off & (for /f "tokens=5" %a in ('netstat -aon ^| findstr 9000') do tasklist /NH /FI "PID eq %a") & echo on

Output:

java.exe                      5312 Services                   0    130,768 K

answered Feb 10, 2016 at 10:17

ROMANIA_engineerROMANIA_engineer

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1

First we find the process id of that particular task which we need to eliminate in order to get the port free:

Type

netstat -n -a -o

After executing this command in the Windows command line prompt (cmd), select the pid which I think the last column. Suppose this is 3312.

Now type

taskkill /F /PID 3312

You can now cross check by typing the netstat command.

NOTE: sometimes Windows doesn’t allow you to run this command directly on CMD, so first you need to go with these steps:

From the start menu -> command prompt (right click on command prompt, and run as administrator)

answered Aug 23, 2014 at 15:25

1

With PowerShell 5 on Windows 10 or Windows Server 2016, run Get-NetTCPConnection cmdlet. I guess that it should also work on older Windows versions.

The default output of Get-NetTCPConnection does not include Process ID for some reason and it is a bit confusing. However, you could always get it by formatting the output. The property you are looking for is OwningProcess.

• If you want to find out the ID of the process that is listening on port 443, run this command:

    PS C:\> Get-NetTCPConnection -LocalPort 443 | Format-List
  
    LocalAddress   : ::
    LocalPort      : 443
    RemoteAddress  : ::
    RemotePort     : 0
    State          : Listen
    AppliedSetting :
    OwningProcess  : 4572
    CreationTime   : 02.11.2016 21:55:43
    OffloadState   : InHost
  

• Format the output to a table with the properties you look for:

    PS C:\> Get-NetTCPConnection -LocalPort 443 | Format-Table -Property LocalAddress, LocalPort, State, OwningProcess
  
    LocalAddress LocalPort  State OwningProcess
    ------------ ---------  ----- -------------
    ::                 443 Listen          4572
    0.0.0.0            443 Listen          4572
  

• If you want to find out a name of the process, run this command:

    PS C:\> Get-Process -Id (Get-NetTCPConnection -LocalPort 443).OwningProcess
  
    Handles  NPM(K)    PM(K)      WS(K)     CPU(s)     Id  SI ProcessName
    -------  ------    -----      -----     ------     --  -- -----------
    143      15     3448      11024              4572   0 VisualSVNServer
  

answered Nov 2, 2016 at 19:19

bahrepbahrep

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To get a list of all the owning process IDs associated with each connection:

netstat -ao |find /i "listening"

If want to kill any process have the ID and use this command, so that port becomes free

Taskkill /F /IM PID of a process

answered Apr 17, 2014 at 14:38

Monis MajeedMonis Majeed

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1

It is very simple to get the port number from a PID in Windows.

The following are the steps:

1. Go to run → type cmd → press Enter.

2. Write the following command...

   netstat -aon | findstr [port number]
   

   (Note: Don't include square brackets.)

3. Press Enter...

4. Then cmd will give you the detail of the service running on that port along with the PID.

5. Open Task Manager and hit the service tab and match the PID with that of the cmd, and that's it.

answered May 30, 2016 at 6:36

Nishat LakhaniNishat Lakhani

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0

netstat -aof | findstr :8080 (Change 8080 for any port)

answered Feb 16, 2021 at 23:59

David JesusDavid Jesus

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To find out which specific process (PID) is using which port:

netstat -anon | findstr 1234

Where 1234 is the PID of your process. [Go to Task Manager → Services/Processes tab to find out the PID of your application.]

answered Dec 14, 2018 at 6:55

Talha ImamTalha Imam

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In case someone need an equivalent for macOS like I did, here is it:

lsof -i tcp:8080

After you get the PID of the process, you can kill it with:

kill -9 <PID>

answered Aug 12, 2020 at 11:22

Benjamin WenBenjamin Wen

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Just open a command shell and type (saying your port is 123456):

netstat -a -n -o | find "123456"

You will see everything you need.

The headers are:

 Proto  Local Address          Foreign Address        State           PID
 TCP    0.0.0.0:37             0.0.0.0:0              LISTENING       1111

This is as mentioned here.

answered Jan 25, 2017 at 0:13

1

If you'd like to use a GUI tool to do this there's Sysinternals' TCPView.

answered Sep 7, 2008 at 6:40

David WebbDavid Webb

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1. Open the command prompt - start → Run → cmd, or start menu → All Programs → Accessories → Command Prompt.

2. Type

   netstat -aon | findstr '[port_number]'
   

Replace the [port_number] with the actual port number that you want to check and hit Enter.

1. If the port is being used by any application, then that application’s detail will be shown. The number, which is shown at the last column of the list, is the PID (process ID) of that application. Make note of this.

2. Type

   tasklist | findstr '[PID]'
   

Replace the [PID] with the number from the above step and hit Enter.

1. You’ll be shown the application name that is using your port number.

answered May 9, 2019 at 12:18

Anatole ABEAnatole ABE

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Netstat:

• -a displays all connection and listening ports
• -b displays executables
• -n stop resolve hostnames (numerical form)

• -o owning process

  netstat -bano | findstr "7002"
  
  netstat -ano > ano.txt 
  

The Currports tool helps to search and filter

answered Sep 23, 2018 at 5:05

Blue CloudsBlue Clouds

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Type in the command: netstat -aon | findstr :DESIRED_PORT_NUMBER

For example, if I want to find port 80: netstat -aon | findstr :80

This answer was originally posted to this question.

answered Nov 22, 2016 at 15:36

TechnotronicTechnotronic

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netstat -ao and netstat -ab tell you the application, but if you're not a system administrator you'll get "The requested operation requires elevation".

It's not ideal, but if you use Sysinternals' Process Explorer you can go to specific processes' properties and look at the TCP tab to see if they're using the port you're interested in. It is a bit of a needle and haystack thing, but maybe it'll help someone...

answered Mar 13, 2014 at 19:57

Tony DelroyTony Delroy

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I recommend CurrPorts from NirSoft.

CurrPorts can filter the displayed results. TCPView doesn't have this feature.

Note: You can right click a process's socket connection and select "Close Selected TCP Connections" (You can also do this in TCPView). This often fixes connectivity issues I have with Outlook and Lync after I switch VPNs. With CurrPorts, you can also close connections from the command line with the "/close" parameter.

answered Jun 29, 2015 at 22:07

JoshJosh

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A single-line solution that helps me is this one. Just substitute 3000 with your port:

$P = Get-Process -Id (Get-NetTCPConnection -LocalPort 3000).OwningProcess; Stop-Process $P.Id

Edit: Changed kill to Stop-Process for more PowerShell-like language

answered Feb 3, 2019 at 14:46

2

To find pid who using port 8000

netstat -aon | findstr '8000'

To Kill that Process in windows

taskkill /pid pid /f

where pid is the process id which you get form first command

answered Jul 14, 2020 at 6:13

jizjiz

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Follow these tools: From cmd: C:\> netstat -anob with Administrator privileges.

Process Explorer

Process Dump

Port Monitor

All from sysinternals.com.

If you just want to know process running and threads under each process, I recommend learning about wmic. It is a wonderful command-line tool, which gives you much more than you can know.

Example:

c:\> wmic process list brief /every:5

The above command will show an all process list in brief every 5 seconds. To know more, you can just go with /? command of windows , for example,

c:\> wmic /?
c:\> wmic process /?
c:\> wmic prcess list /?

And so on and so forth. :)

1

Using Windows' default shell (PowerShell) and without external applications

For those using PowerShell, try Get-NetworkStatistics:

> Get-NetworkStatistics | where Localport -eq 8000


ComputerName  : DESKTOP-JL59SC6
Protocol      : TCP
LocalAddress  : 0.0.0.0
LocalPort     : 8000
RemoteAddress : 0.0.0.0
RemotePort    : 0
State         : LISTENING
ProcessName   : node
PID           : 11552

answered Aug 25, 2016 at 13:36

mikemaccanamikemaccana

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Use:

netstat -a -o

This shows the PID of the process running on a particular port.

Keep in mind the process ID and go to Task Manager and services or details tab and end the process which has the same PID.

Thus you can kill a process running on a particular port in Windows.

answered Aug 13, 2013 at 2:32

nishanisha

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You can also check the reserved ports with the command below. Hyper-V reserve some ports, for instance.

netsh int ipv4 show excludedportrange protocol=tcp

answered Nov 24, 2020 at 14:50

Using PowerShell... ...this would be your friend (replace 8080 with your port number):

 netstat -abno | Select-String -Context 0,1 -Pattern 8080

Sample output

>   TCP    0.0.0.0:8080           0.0.0.0:0              LISTENING         2920
   [tnslsnr.exe]
>   TCP    [::]:8080              [::]:0                 LISTENING         2920
   [tnslsnr.exe]

So in this example tnslsnr.exe (OracleXE database) is listening on port 8080.

Quick explanation

• Select-String is used to filter the lengthy output of netstat for the relevant lines.
• -Pattern tests each line against a regular expression.
• -Context 0,1 will output 0 leading lines and 1 trailing line for each pattern match.

answered Dec 28, 2017 at 9:06

JpsyJpsy

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Which of the following commands should you use to locate open ports?

What command could you use to display listening TCP ports on a Linux system?

Which command should you use to display both listening and non listening sockets on your Linux system tip enter the command as if in command prompt?

What of the following would an attacker use to see which ports are listening?