List 10 cities with a median age over 40. Include their zip codes and area codes.
median age over 40 refers to median_age > 40
SELECT T2.city, T2.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.median_age >= 40 LIMIT 10