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This question already has an answer here:

In My PC, I am running :

telnet localhost 80

and it seems that there is an answer.
No IIS runs, no java server runs.

How do I know which process listens to 80 port?

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marked as duplicate by Tog, Tanner Faulkner, Brad Patton, Ƭᴇcʜιᴇ007, Scott Jun 1 '13 at 0:45

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

up vote 5 down vote accepted

Open command prompt as administrator and run the below command

C:\>netstat -a -b

netstat is used to display information and statistics about the network connections. The flag -a makes it display all connections and listening ports and the flag -b makes it show the associated executable.

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