Other cities in the 520 area code include: Casa Grande, Sierra Vista, Prescott, Apache Junction, Nogales, Douglas, Coolidge, Cottonwood, Camp Verde, Bisbee, Benson, Clarkdale, Willcox, Superior, Wellton, Kearny, Mammoth, Tombstone, Patagonia, and Winkelman.
Tucson is a city and the county seat of Pima County, Arizona, United States, and home to the University of Arizona. The 2010 United States Census put the population at 520,116, while the 2015 estimated population of the entire Tucson metropolitan statistical area (MSA) was 980,263. The Tucson MSA forms part of the larger Tucson-Nogales combined statistical area (CSA), with a total population of 1,010,025 as of the 2010 Census. Tucson is the second-largest populated city in Arizona behind Phoenix, both of which anchor the Arizona Sun Corridor. The city is located 108 miles (174 km) southeast of Phoenix and 60 mi (97 km) north of the U.S.–Mexico border.
Phoenix is the capital and most populous city of the U.S. state of Arizona. With 1,563,025 people (as of 2015 ), Phoenix is the sixth most populous city nationwide, the most populous state capital in the United States, and the only state capital with a population of more than one million residents. Phoenix is the anchor of the Phoenix metropolitan area, also known as the Valley of the Sun, which in turn is a part of the Salt River Valley. The metropolitan area is the 12th largest by population in the United States, with approximately 4.3 million people as of 2010 .
Sierra Vista is a city in Cochise County, Arizona, United States. As of the 2010 census the population of the city was 43,888. The city is part of the Sierra Vista-Douglas Metropolitan Area, with a 2010 population of 131,346. Fort Huachuca, a U.S. Army post, is located in the northwest part of the city.Sierra Vista, which is Spanish for "Mountain Range View", is located 75 miles (121 km) southeast of Tucson and serves as the main commercial, cultural, and recreational hub of Cochise County.
The 520 area code lies within the Mountain Standard Time Zone (or MST). The current time in MST is 1:10 AM on Jul 07, 2020.