The easiest way is to use a website like DNSStuff.com. The tool
you want is called 'IP lookup.' It will bring up a chart showing
all the available information about the IP, and if possible, it
will show you the city where the IP is registered.
IP Geolocation is another, similar option. You can just put your
IP address at the back of http://www.ip2location.com/ , for
example, http://www.ip2location.com/64.233.167.104 if you want to
trace the IP address for Google.com . You can locate the Country,
Region, City, Latitude, Longitude, ZIPCode, Timezone, ISP, Domain,
Netspeed, Areacode and Weather of the IP address.