Provide the zip codes and area codes of the postal points with the community post office type at the elevation above 6000.
community post office type refers to type = 'Community Post Office'; elevation above 6000 refers to elevation > 6000;
SELECT T1.zip_code, T1.area_code FROM area_code AS T1 INNER JOIN zip_data AS T2 ON T1.zip_code = T2.zip_code WHERE T2.type = 'Community Post Office ' AND T2.elevation > 6000