Write SQL query to solve given problem: Where is the address 15873 located, in what city and state? Does that city belong to a province where the code exists?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T2.City, T1.Name, T1.IsOnlyStateProvinceFlag FROM StateProvince AS T1 INNER JOIN Address AS T2 ON T1.StateProvinceID = T2.StateProvinceID WHERE T2.AddressID = 15873