When I first moved to Springfield, I asked, "Should I go with 703 or 571?" and was told, "These days, they just assign them randomly."

After that, I became curious about why there are two area codes in this region, and it turns out to be a story connected to the growth history of Northern Virginia.

703 has a long history. In October 1947, it was created as one of the original 86 area codes when the North American Numbering Plan (NANP) was first established.

Initially, it covered the entire state of Virginia. On June 24, 1973, the first split occurred, separating the eastern part of Virginia into 804, and 703 became responsible for Northern Virginia. From then on, Springfield, Alexandria, Arlington, Fairfax, and others all fell under the 703 area.

However, there was another split in 1995, and less than four years later, 703 was facing exhaustion. The reason is simple: the explosive increase in demand for numbers due to the rise of cell phones, faxes, and pagers. Northern Virginia was also experiencing rapid growth at that time. So, on March 1, 2000, 571 was added as an overlay to 703. The overlay method allows two area codes to coexist in the same geographic area, maintaining existing 703 numbers while assigning 571 to new numbers.

Currently, both 703 and 571 cover all of Northern Virginia. Specifically, this includes independent cities like Alexandria, Fairfax City, Falls Church, Manassas, and Manassas Park, as well as all of Arlington County, Fairfax County, and parts of Prince William, Loudoun, and Fauquier Counties. Since Springfield is within Fairfax County, it naturally falls under the 703/571 area. When a new phone line is activated, one of the two codes is assigned randomly, and either one provides the same service and coverage.

These days, area codes often do not indicate residency. Many people move from other states and keep their existing numbers. However, when looking at local businesses or community contacts, 703 and 571 still dominate. If you receive a call from a number with a 703 or 571 area code in Springfield, it signals a local number, and this single digit carries over 70 years of growth history in Northern Virginia.