Posted on 2005-04-07
Last Modified: 2010-04-10
Hi There

Silly question,

How do i check and see what tcp ports are in use and available on my local pc?
Question by:hitechauto
    LVL 70

    Expert Comment

    by:Chris Dent

    Assuming it's a Windows based system...

    The command (run from the command line):

    netstat -a

    Will show you which ports are in use and the status of those ports.


    LVL 4

    Expert Comment

    or run a port scanner from other PC, and it wil tell you which port is in use, and the one that is not showing up means that you can use it.
    LVL 2

    Expert Comment

    G-lock software has a program called Advanced Administrative Tools that has a nice network monitor that lists tons of useful information regarding open ports, ip's and proccesses using them.
    LVL 3

    Expert Comment

    If you don't wan't to install anything, you could also go to this site:
    and you'll get all the info an outsider can get.
    LVL 8

    Expert Comment


    I recommend using this port scanner:

    Search for 'SuperScan' and take alook at the screen shot and opinions if you wish.
    LVL 10

    Accepted Solution

    Fport is a free tool that will show you what programs on your system are opening which ports (both TCP and UDP). You can look at the output and see if you notice any strange programs that don't belong on the machine.
    LVL 3

    Expert Comment

    nmap for windows

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