How can I tell who owns what IP addresses?

9860 pts.
Tags:
Firewalls
IP address
IP Address Allocation
IP address management
SonicWALL Pro 3060
Windows Server 2008
Is there a method to tell who owns what IP addresses? I would like to know who owns a IP range that keeps showing up in my firewall logs. Can I pin point it to a company or just to the ISP like I am doing currently?

Software/Hardware used:
Windows Server 2008, Sonicwall Pro 3060

Answer Wiki

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This can be found out using a whois query or going here. You may need to go to the ISP with some logs to show what is happening to ask them to divulge more information.

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