| area code | Text | An areacode to search within. | 
| region | Text | A region or state to search within. Must be an ISO 3166-2 alpha-2 code, i.e. CA for California. Cannot be used in combination with areacode. | 
| city | Text | A specific City to search within. Example, New York. Must be used in combination with region. Cannot be used with areacode, starts_with, contains, or ends_with. | 
| contains | Text | A string of 3 to 7 digits that should appear somewhere in the number. | 
| start with | Text | A string of 3 to 7 digits that should be used as the start of a number. Cannot be used in combination with contains or ends_with. | 
| ends with | Text | A string of 3 to 7 digits that should be used as the end of a number. Cannot be used in combination with starts_with or contains. |