To obtain geographical information from an IP address, one can use an existing database or service, priced from $50 to $600 depending on the level of detail. There are also some free databases, providing information only on a country level. Usually, these are reduced versions of complete commercial databases (for example www.MaxMind.com or www.IP2Location.com). The geographical information allows to determine which regions are most interested in your services, so you can make arrangements with local resellers or establish your local representative offices.
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— Rob Hon,Vice President of Engineering,Network Physics