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Area code 520 is a telephone area code in the North American Numbering Plan (NANP) for the U.S. state of Arizona. The numbering plan area comprises Tucson and most of the southeastern part of the state. Area code 520 was created in a split of area code 602 on March 19, 1995.
- List of Arizona area codes
Area code 520 serves Southern Arizona, including Tucson and...
- List of Arizona area codes
520 is an area code located in the state of Arizona, US. The largest city it serves is Tucson. Location, time zone and map of the 520 area code. Local time. 3:23:26 AM, Saturday 25, May 2024 MST. Time difference to GMT/UTC. Daylight Saving Time 2024 (Summer Time) No known DST-adjustments for year 2024. Time zone.
1 mag 2024 · Important 520 Area Code Information. Area Code 520 is located in Arizona. It covers 59 cities, including Phoenix, Tucson, Chandler, Gilbert, and Scottsdale. It also covers 9 counties, including Pima County, Cochise County, Maricopa County, Pinal County, and Santa Cruz County.
- History
- Administration
- Numbering Plan
- Non-Geographic Services
- Cellular Mobile Services
- Growth
- Dialing Procedures
- International Dialing
- Number Portability
- Toll Charges
From the Bell System's beginnings in 1876 and throughout the first part of the 20th century, telephone networks grew from essentially local or regional telephone systems. These systems expanded by increasing their subscriber bases, as well as increasing their service areas by implementing additional local exchanges that were interconnected with tie...
The NANP is administered by the North American Numbering Plan Administrator (NANPA, formerly Administration).This function is overseen by the Federal Communications Commission, which assumed the responsibility upon the end of the Bell System. The FCC solicits private sector contracts for the role of the administrator. Before the division of the Bel...
The long-range vision of the architects of the North American Numbering Plan was a system by which telephone subscribers in the United States and Canada could themselves dial and establish a telephone call to any other subscriber without the assistance of switchboard operators. While the dialing of telephone calls by subscribers was common-place in...
The North American Numbering Plan recognizes the need for non-geographic services by designating certain numbering blocks for such purposes. Many of these telephone numbers are selected from the easily recognizable codes(ERCs). System-wide toll-free calling, for which the receiving party is billed for the call, uses the number range with area codes...
The North American Numbering Plan does not reserve special non-geographic area codes exclusively for cellular phones, as is customary in some other national telephone administrations. Only one regional exception exists in area code 600in Canada. For cellular services, telephone numbers in the NANP are allocated within each area code from special ce...
Canada and the United States have experienced rapid growth in the number of area codes, particularly between 1990 and 2005. The widespread adoption of fax, modem, and mobile phone communication, as well as the deregulation of local telecommunication services in the United States during the mid-1990s, increased the demand for telephone numbers. The ...
The structure of the North American Numbering Plan permits implementation of local dial plans in each plan area, depending on requirements. When multiple NPA codes serve an area in an overlay arrangement, ten-digit (10D) dialing is required. Seven-digit (7D) dialing may be permissible in areas with single area codes. Depending on the requirement of...
While direct dialing of international calls was available in some locations in the United States by the late 1950s, a continental system was introduced asInternational Direct Distance Dialing(IDDD) for the territories of the North American Numbering Plan in March 1970. IDDD was implemented through extensive modifications in the switching systems to...
The Telecommunications Act of 1996 (47 U.S.C. § 251 (b)(2)) authorizes the Federal Communications Commission (FCC) to require all local exchange carriers (LECs) to offer local number portability. The FCC regulations were enacted on June 27, 1996, with changes to take effect in the one hundred largest Metropolitan Statistical Areasby October 1, 1997...
Telephone calls between countries and territories of the NANP are not typically charged at domestic rates. For example, most long-distance plans may charge a California subscriber a higher rate for a call to British Columbia than for a call to New York, even though both destinations are within the NANP. Similarly, calls from Bermuda to U.S. destina...
References. Other websites. List of North American Numbering Plan area codes. This is a list of North American telephone area codes in effect for the North American Numbering Plan (NANP). The area to which an area code is officially assigned is known as a Numbering Plan Area (NPA).
520 – Arizona Area Codes. Number structure. List of area codes. Sort by: City. Area Code. 520-207. Tucson. 520-219. Tucson. 520-225. Tucson. 520-229. Tucson. 520-232. Tucson. 520-281. Nogales. 520-287. Nogales. 520-29 •. Tucson. 520-300. Tucson. 520-316. Casa Grande. 520-318. Tucson. 520-319. Tucson. 520-32 •. Tucson. 520-344. Tucson. 520-364.
