Main city: Tucson
Timezone: (UTC-7)
Phone type: Cell Number
Operator: Bandwidth.com Clec

Tucson, a city in and the county seat of Pima County, Arizona, United States, and home to the University of Arizona. The 2010 United States Census puts the city's population at 520,116, while the 2012 estimated population of the entire Tucson metropolitan area was 992,394. The Tucson MSA forms part of the larger Tucson-Nogales combined statistical area, with a total population of 980,263 as of the 2010 Census. Tucson is the second-largest populated city in Arizona behind Phoenix, which both 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. Tucson is the 33rd largest city and the 52nd largest metropolitan area in the United States. Roughly 150 Tucson companies are involved in the design and manufacture of optics and optoelectronics systems, earning Tucson the nickname Optics Valley. ^source

North American area code 928 is a telephone area code in the state of Arizona that was created in a split from area code 520 on June 23, 2001, due mainly to population gains in Tucson, Yuma and Flagstaff. 928 covers northern, eastern, and western portions of Arizona. The area code encompasses areas such as the Grand Canyon, Flagstaff, Lake Havasu City, Kingman, Prescott, Wickenburg, and Yuma, also serving the majority of Greenlee County. The Arizona portion of the Navajo Nation is served by the 928 area code. Some areas on the western and northern fringes of the Phoenix metropolitan area such as Lake Pleasant Regional Park in Peoria also fall within this area code. ^source