VARIABLE LENGTH CALLED NUMBER SCREENING

摘要

A system (100) for preventing telecommunications fraud comprising a database (114) and fraud control center (118) having at least one processor to receive and store numbers representing terminating ANIs in the database (114) that have generated a fraud alert, to check the database (114) to determine if the dialed terminating ANI matches a stored number. The stored numbers include at least a portion of the terminating ANI and at least one variable length character, and are accessible to block subsequent calls directed at the respective terminating ANIs. The at least one variable length character also matches one or more or any corresponding or subsequent characters in the dialed terminating ANI. A match between the dialed terminating ANI and a stored number initiate a block of the dialed call.