835600. According to the postal code database query, the postal code of Zhaosu County is 835600, which can be used by all communities under the jurisdiction of Zhaosu County. Postal code is a coding method used by a country or region to divide the country in order to automate mail sorting and digitize the postal network and speed up mail delivery. The postal code system has become one of the standards for measuring the level of a country's communication technology and postal services.