Area code 900 is not an area code used for standard geographic regions like other area codes; instead, it is used for premium-rate telephone numbers in the United States. Calls to 900 numbers typically incur additional charges, often used for services like adult content, psychic hotlines, and other pay-per-call services. These calls are billed at a higher rate than normal calls, and users should be cautious, as charges can accumulate quickly.
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