Who Does That IP Address Belong To

My ZoneAlarm keeps giving me a pop up window telling me that a certain IP (xxx.xx.xx.xx)address is trying to communicate with my computer.  I have a DSL connection.  How can I find out wh this address belongs to?
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sbuehrleConnect With a Mentor Commented:
Go to http://www.arin.net/whois/index.html and enter that IP address
into the search form.

nslookup xxx.xxx.xxx.xxx

*may* give you a name to attach to the address.
If it does not, traceroute xxx.xx.xx.xx
will point you to the general net-neighborhoood.

As far as 'who' is concerned, noe that's an entirely different question...
But, if the message bothers you, at least you can complain to his/her ISP.

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