Windows CLI: Built-In Utility to list open Ports in XP / Vista / 7

Question

I need a utility built into several versions of Windows (XP to Win7 specifically) that can tell me if a particular port is in use. I've found a few different ways for each OS, but I'm looking for a single command that works across all of them.

score 5 · Accepted Answer · answered May 25 '11 at 12:14

5

Perhaps Netstat? netstat -h will give options.

answered May 25 '11 at 12:14

Bart Silverstrim

31,296

score 3 · Answer 2 · answered May 25 '11 at 12:24

3

If you use netstat -n it will tell you the current in use ports. The -n tells it not to try to resolve hostnames from IPs. You could also run it with -a to have it TRY to resolve hostnames.

answered May 25 '11 at 12:24

HostBits

11,945

score 3 · Answer 3 · answered May 26 '11 at 13:22

3

netstat -bona

This will link ports to processes. Very useful if you want to know what process is running on port X.

For easy reviewing I redirect the output to a file

netstat -bona > file.txt

answered May 26 '11 at 13:22

Paul

317

Windows CLI: Built-In Utility to list open Ports in XP / Vista / 7

3 Answers3