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                    | Title | Test
                        Details
                        
                        
                            Pattern Title | 
                
                    | Expression | 
                            ^([0-9]( |-)?)?(\(?[0-9]{3}\)?|[0-9]{3})( |-)?([0-9]{3}( |-)?[0-9]{4}|[a-zA-Z0-9]{7})$
                         | 
                
                    | Description | Matches US phone number format. 1 in the beginning is optional, area code is required, spaces or dashes can be used as optional divider between number groups. Also alphanumeric format is allowed after area code. | 
                
                    | Matches | 1-(123)-123-1234 | 123 123 1234 | 1-800-ALPHNUM | 
                
                    | Non-Matches | 1.123.123.1234 | (123)-1234-123 | 123-1234 | 
                
                    | Author | Rating:  Igor Kravtsov | 
            
        
    
        
        
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