Find the port used by process in windows

Find the port used by which process in windows

Faced one issue during configuring listener with netca utility. Its show me that port – 1521 is already in used. But when i checked the listener services is not running. Then i took backup of network folder and drop the listener on window platform. But again when try to reconfigure listener throw same error.

Then I checked with windows commands to find which application is using 1521.

1. From command prompt administrator windows run following command:

netca

Show all running process

Check only for 1521 port:

netstat -aon | find "1521"

E:\patch_backup\deinstall>netstat -aon | find "1521"
Proto Local Address Foreign Address State Process
TCP 0.0.0.0:1521 0.0.0.0:0 LISTENING 2612
TCP 127.0.0.1:1521 127.0.0.10:57934 ESTABLISHED 2612
TCP 127.0.0.1:1521 127.0.0.10:57935 ESTABLISHED 2612
TCP 127.0.0.1:1521 127.0.0.10:57938 ESTABLISHED 2612

Means:
a : List all connections and listening ports.
O : List the owning process ID
n : List addresses and port numbers.

2. Verify the listener is running from which process id

tasklist /m ora*

Image Name PID Modules
========================= ======== ============================================
TNSLSNR.EXE 2612 oransgr11.dll, oran11.dll, oranl11.dll,
orantcp11.dll, oracore11.dll, oranls11.dll,
oraunls11.dll, orauts.dll,


3. Kill the task if needed

taskkill /PID 2612 /F

 

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