The original area code, 919, was created in 1954 as a split from area code 704, then serving the entire state. After successive splits in the 1990s, the numbering plan area received a second area code, 984, in 2011, as an overlay area code for the same territory.
History
When area codes were first assigned in 1947, all of North Carolina was assigned area code 704. In 1954, the eastern and central portions of the state—everything from Winston-Salem eastward—split off as area code 919. 704 was reduced to Charlotte and all points west.
Despite North Carolina's growth in the second half of the 20th century, this configuration remained in place for 39 years. In 1993, the western and southern portions of the numbering plan area, including Winston-Salem, Greensboro, Fayetteville and Wilmington, were split off to form area code 910. However, a sliver of Alamance County around Mebane stayed in 919. This was because portions of eastern Mebane are in Orange County, almost all of which stayed in 919. BellSouth drew the new 919-910 boundary in order to preserve seven-digit dialing throughout Mebane.
Area code 919 was initially slated for overlay with area code 984 in 2001. However, due to the implementation of number pooling, the overlay was deferred when the supply of numbers was deemed sufficient for the near term.[1] Within a decade, however, the Triangle's continued growth and the proliferation of cellular telephones and pagers meant that the implementation of 984 could no longer be delayed. In September 2011, the North Carolina Utilities Commission commenced the implementation, with a permissive dialing period for local calls from October 1, 2011 to March 31, 2012, when ten-digit dialing became mandatory across the Triangle region. New telephone numbers for 984 were assigned no later than August, 2014.
As a result of the ten-digit dialing conversion, incorrect dialing of 919 by customers resulted in thousands of wrong number calls to 9-1-1.[2]
Despite the Triangle's continued growth, 919/984 is far from exhaustion. Projections in 2019 have no exhaust date for 919/984, meaning that the Triangle will not need another area code for at least 30 years.[3]
Service area
Counties
Alamance (small portion in northeast, most of county is in 336/743)
Chatham (except small portion in northwest which is in 336/743)
Duplin (north-central portion, most of county is in 910)