To trace phone calls from an unavailable number in the United States, dial *57 after hanging up, and follow the directions provided by the electronic voice. Report the number after three successful traces by contacting y... More » Government & Politics Public Records

Contact your service provider to trace a blocked phone call. You can also trace blocked calls from a smartphone using subscription applications or the *57 function. More » Government & Politics Public Records

Landlines and digital cell phones that are registered on a cellular network can be immediately traced. Prepaid phones take a while longer to trace and cannot be pinpointed to an exact location. More » Technology
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