CONTACT INFORMATION QUERYING

System and method for querying of contact information are disclosed. An aspect of the invention includes a method for querying contact information. The method includes receiving a query language including relationship information of a plurality of contacts with unknown contact information. The method further includes acquiring a query request, wherein acquiring the query request includes parsing the query language according to a query language syntax. The method further includes querying contact information of the plurality of contacts with unknown contact information in at least one directory to obtain the contact information of the plurality of contacts with unknown contact information requested in the query request. The method further includes returning the contact information of the plurality of contacts with unknown contact information requested in the query request.