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 520 and exchange code 338 is assigned to TUCSON. The latitude and longitude corresponding to 32.2217429 and -110.926479 can be used to find an area on the map. Broadvox-CLEC LLC - AZoperates most of the land lines in United States.