571 area code

What time zone is area code 571?

The 571 area code is situated within the Eastern Time Zone (ET) in the United States. The Eastern Time Zone is four hours behind Coordinated Universal Time (UTC-4). This time zone includes a significant portion of the eastern United States, spanning from the Eastern Seaboard to parts of the Midwest. Therefore, individuals using the 571 area code, which serves Northern Virginia, including cities such as Arlington and Fairfax, follow the Eastern Time Zone conventions for setting local time.

Note that the start and end dates of daylight saving time can change

History

The 571 area code has its origins in the increasing demand for telephone numbers in Northern Virginia. Before the introduction of the 571 overlay, the region was primarily served by the 703 area code. As the population and telecommunications needs grew, the North American Numbering Plan Administration (NANPA) implemented the overlay plan in 2000 to address the exhaustion of available numbers in the 703 area code. The introduction of the 571 area code allowed for the coexistence of two area codes within the same geographic region, preventing the need for a geographic split and enabling the continued growth of telecommunications services in Northern Virginia. This overlay strategy has since been a common approach to managing the demand for phone numbers in various parts of the United States.