1. A method of associating nation information with a document, the method comprising the steps of: determining whether a top-level domain indicated in a Uniform Resource Locator (URL) of a host is a national domain; and in response to determining that the top-level domain of the host is not a national domain: (a) determining which particular nations said host is associated with based on factors other than said top-level domain, and (b) associating the document with at least one of said particular nations; wherein the top-level domain is a suffix that follows a last period in a host name of the host in the URL; wherein the method is performed by one or more computing devices.