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Area Code Overview
Area code 821 is a geographic telephone area code in South Carolina that went into service on August 19, 2024. The geographic regions covered by this area code overlay has a population of approximately 1,650,134.
Overlay and Dialing Rules
- Area Code: 821
- State: South Carolina
- Type: General Purpose Code
- In Service Date: August 19, 2024
- Overlay Complex: 821/864
- Local Dialing Plan: This area does require you to dial the area code when calling locally.
Estimated Number of Assigned Phone Numbers in Area Code 821
This area code is ranked 354th out of 363 nationwide in estimated assigned phone numbers. Within the state territory it serves, it is ranked 6th out of 6.
259,000
Estimated Service-Type Mix of Assigned Phone Numbers in Area Code 821
Wireline and VoIP
36,000 assigned
13.90%
Other / Unclassified
8,000 assigned
3.09%
Estimated Share of Wireless Numbers Originally Assigned to Each Carrier in Area Code 821
Estimated assigned wireless phone numbers: 215,000
Numbers may later be ported to another carrier, but this chart reflects original number assignment, not current subscriber share.
AT&T Wireless 184,000 (85.58%)
Verizon Wireless 19,000 (8.84%)
SUNCOM DBA T-MOBILE USA 11,000 (5.12%)
Estimated Share of Wireline and VoIP Numbers Originally Assigned to Each Carrier in Area Code 821
Estimated assigned wireline and VoIP phone numbers: 36,000
TERRA NOVA TELECOM INC. 5,000 (13.89%)
LEAP TELECOM, LLC 1,000 (2.78%)
Peerless Network 1,000 (2.78%)
Other / Unclassified Assigned Numbering in Area Code 821
Estimated assigned other or unclassified phone numbers: 8,000
HD CARRIER LLC 5,000 (62.50%)
WAVENATION, LLC 1,000 (12.50%)
Cities and Towns in Area Code 821
Abbeville, South Carolina Anderson, South Carolina Antioch, South Carolina Belton, South Carolina Blacksburg, South Carolina Blue Ridge, South Carolina Calhoun Falls, South Carolina Campobello, South Carolina Central Crossroads, South Carolina Chappells, South Carolina Chesnee, South Carolina Clarks Hill, South Carolina Clemson, South Carolina Clinton, South Carolina Cowpens, South Carolina Cross Hill, South Carolina Due West, South Carolina Easley, South Carolina Enoree, South Carolina Fountain Inn, South Carolina Gaffney, South Carolina Gray Court, South Carolina Greenville, South Carolina Greenwood, South Carolina Greer, South Carolina Hickory Tavern, South Carolina Hodges, South Carolina Honea Path, South Carolina Inman, South Carolina Iva, South Carolina Joanna, South Carolina Jonesville, South Carolina Landrum, South Carolina Laurens, South Carolina Liberty, South Carolina Lockhart, South Carolina Lyman, South Carolina Mc Cormick, South Carolina Mount Carmel, South Carolina Mountville, South Carolina Ninety Six, South Carolina Pacolet, South Carolina Pelzer, South Carolina Pendleton, South Carolina Pickens, South Carolina Piedmont, South Carolina Plum Branch, South Carolina Salem, South Carolina Saluda, South Carolina Seneca, South Carolina Simpsonville, South Carolina Six Mile, South Carolina Spartanburg, South Carolina Starr, South Carolina Travelers Rest, South Carolina Troy, South Carolina Union, South Carolina Walhalla, South Carolina Wando, South Carolina Ware Shoals, South Carolina Waterloo, South Carolina Westminster, South Carolina Williamston, South Carolina Woodruff, South Carolina These geographic regions are also served by area code 864.
How These Figures Were Built
These figures are estimates based on public phone-number assignment records. They are meant to show the likely mix of assigned phone numbers associated with area code 821, not live customer counts.
Some providers may have assigned phone numbers tied to this area code even if they do not actively market or sell service locally. These figures reflect public number-assignment records, not confirmed local service availability.
They also do not reflect number portability at the individual phone-number level, so some numbers may now be used on a different network or by a different provider than the original assignment records suggest.
Population data and locality matching provided by GeoNames.
Last refreshed: April 15, 2026 6:22 pm