| 摘要 |
After receiving a telephone number, various characteristics of the telephone number are determined. These include, the type of phone associated with the telephone number, the phone carrier of the telephone number, and geographic characteristics of the telephone number. This can be done, for instance, by analyzing the telephone connection or querying a database containing a plurality of telephone numbers and characteristics of each of the telephone numbers. The determination may be used to prevent fraudulent or restricted access to a website or system.
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