Area code and exchange code is assigned to every constituent of city in the United States. The area and exchange codes of the telephone can be used to find information about a region. Area code 620 and exchange code 321 is assigned to Moundridge. The latitude and longitude corresponding to 38.2025 and -97.51566 can be used to find an area on the map. Verizon Wirelessoperates most of the land lines in United States.