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External Data Source

Source

Regular Expression
^([(]?[+]{1}[0-9]{1,3}[)]?[ .\-]?)?[(]?[0-9]{3}[)]?[ .\-]?([0-9]{3}[ .\-]?[0-9]{4}|[a-zA-Z0-9]{7})([ .\-]?[/]{1}[ .\-]?[0-9]{2,4})?$