Area codes 864 and 821 are telephone overlay

area code A telephone numbering plan is a type of numbering scheme used in telecommunication to assign telephone numbers to subscriber telephones or other telephony endpoints. Telephone numbers are the addresses of participants in a telephone network, rea ...

s in the

North American Numbering Plan The North American Numbering Plan (NANP) is an integrated telephone numbering plan for twenty-five regions in twenty countries, primarily in North America and the Caribbean. This group is historically known as World Zone 1, World Numbering Zone ...

(NANP) for the western third of the

U.S. state In the United States, a state is a constituent political entity, of which there are 50. Bound together in a political union, each state holds governmental jurisdiction over a separate and defined geographic territory where it shares its so ...

South Carolina South Carolina ( ) is a U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders North Carolina to the north and northeast, the Atlantic Ocean to the southeast, and Georgia (U.S. state), Georg ...

. The numbering plan area (NPA) comprises the areas of Greenville,

Spartanburg Spartanburg is a city in and the county seat of Spartanburg County, South Carolina, United States. The city had a population of 38,732 as of the 2020 census, making it the 11th-most populous city in the state. The Office of Management and Budg ...

, Anderson, and twelve surrounding counties. Other cities in the numbering plan area include Clemson, Gaffney, Greer, and Mauldin. It is largely coextensive with

the Upstate The Upstate, historically known as the Upcountry, is a region of the U.S. state of South Carolina, comprising the northwesternmost area of the state. Although loosely defined among locals, the general definition includes the 10 counties of the ...

region. Area code 864 was created in a division of numbering plan area

803 __NOTOC__ Year 803 ( DCCCIII) was a common year starting on Sunday of the Julian calendar. Events By place Byzantine Empire * Emperors Nikephoros I and Charlemagne settle their imperial boundaries in the Adriatic Sea, and sign the Pa ...

on December 3, 1995. Projections of 2021 anticipated the requirement of relief from telephone number exhaustion in the Upstate region with a new area code for 2024 or 2025. On November 28, 2022, the NANP Administrator (NANPA) and the South Carolina Public Service Commission set the in-service date for overlay area code 821 to August 19, 2024, after a permissive ten-digit dialing period from January 19, 2024, to July 19, 2024. Activations of central office codes for 821 began in November 2024.

References

External links

{{Area code box , State = SC , This = 864/821 , N =

828 __NOTOC__ Year 828 ( DCCCXXVIII) was a leap year starting on Wednesday of the Julian calendar. Events By place Byzantine Empire * Siege of Syracuse: The Muslims under Asad ibn al-Furat defeat a Byzantine relief army sent from Paler ...

, 704/980 , S =

706 __NOTOC__ Year 706 ( DCCVI) was a common year starting on Friday of the Julian calendar, the 706th year of the Common Era (CE) and Anno Domini (AD) designations, the 706th year of the 1st millennium, the 6th year of the 8th century, and the 7th ...

, E = 803/839 , W = 706/762 , S1 = NC , S2 = GA

864 __NOTOC__ Year 864 ( DCCCLXIV) was a leap year starting on Saturday of the Julian calendar. Events By place Europe * Spring – Emperor Louis II (the Younger) marches with a Frankish army against Rome. While en route to the papa ...

Telecommunications-related introductions in 1995 Telecommunications-related introductions in 2024