Area Code 821
South Carolina
Area code 821 serves South Carolina, primarily Greenville, in the Eastern Time (ET) time zone. It is an overlay area code sharing territory with area code 864.
Overlay Area Code
This area code is part of an overlay region, meaning the same geographic area is served by multiple area codes. Overlay codes were introduced to meet growing demand for phone numbers without requiring existing customers to change their numbers.
This area code shares its geographic region with: area code 864 (Greenville).
In service since: 19-Aug-2024
History
Area code 821 serves as an overlay for the same territory as area code 864. It was introduced in 2024 to provide additional phone number capacity for the region. It shares its territory with area code area code 864.
Demographics
The estimated population served by area code 821 is approximately 2,324,189. The population density is 180 people per square mile, which is higher than the national average of 94. The median household income is $64,195, which is lower than the national median of $78,538. Approximately 28.5% of adults hold a bachelor's degree or higher, compared to the national rate of 35.0%. This rate is lower than the national average. The poverty rate stands at 14.6%, which is higher than the national rate of 12.4%.
Demographics & Economics
- Total Population
- 2,324,189
- Population Density
- 180 people/sq miabove U.S. average (U.S.: 94 people/sq mi)
- Median Household Income
- $64,195below U.S. median (U.S.: $78,538)
- Poverty Rate
- 14.6%above U.S. average (U.S.: 12.4%)
- Unemployment Rate
- 4.5%below U.S. average (U.S.: 5.2%)
- Education Attainment
- Bachelor's Degree+28.5%below U.S. average (U.S.: 35.0%)High School or Lower33.7%
Statistics are population-weighted aggregations from Census ACS 5-year estimates.See Sources for details.
Geographic Coverage
State
SC
Major Cities
- Greenville
- Greer
- Spartanburg
- Anderson
- Mauldin
- Simpsonville
- Easley
- Taylors
- Greenwood
- Wade Hampton
- Five Forks
- Clemson
- Berea
- Gantt
- Gaffney
- Boiling Springs
- Parker
- Powdersville
- Fountain Inn
- Laurens
- Seneca
- Sans Souci
- Travelers Rest
- Union
and 121 more cities
Time Zone
- Eastern Time (ET)
Current Time
County Coverage
Population-weighted county share based on aggregated ZCTA population (100% = total mapped population for area code 821).
| County | Population | Share |
|---|---|---|
| Greenville, SC | 646,931 | 27.8% |
| Spartanburg, SC | 422,328 | 18.2% |
| Anderson, SC | 335,460 | 14.4% |
| Pickens, SC | 223,738 | 9.6% |
| Laurens, SC | 184,345 | 7.9% |
| Abbeville, SC | 119,344 | 5.1% |
| Cherokee, SC | 96,557 | 4.2% |
| Oconee, SC | 89,857 | 3.9% |
| Greenwood, SC | 85,571 | 3.7% |
| Union, SC | 38,591 | 1.7% |
| McCormick, SC | 26,399 | 1.1% |
| Saluda, SC | 18,429 | 0.8% |
| Edgefield, SC | 18,338 | 0.8% |
| York, SC | 9,855 | 0.4% |
| Newberry, SC | 4,952 | 0.2% |
| Chester, SC | 1,747 | 0.1% |
| Fairfield, SC | 1,747 | 0.1% |
Call Context
This area code covers a geographic region across SC, including Greenville and surrounding communities.
Nearby Area Codes
Area codes geographically closest to 821.
Other Area Codes in South Carolina
Area codes that also serve South Carolina, linked for easy comparison.
Frequently Asked Questions
Common questions about area code 821 and how phone numbering works.
Phone numbers assigned to area code 821 are tied to where they were originally provisioned — not the caller's current location. This code serving roughly 2324k people covers Greenville in SC, so a number originally set up there will retain the 821 prefix even if the owner moves or uses VoIP. Mobile phones keep their original number when users relocate, and businesses often adopt local area codes to establish a regional presence.
Start by looking up the area code on this site to understand its geographic context — area code 821 is associated with Greenville in SC. For caller-specific details, use your carrier's caller ID features or check public directories. If you suspect fraud, you can report it to the FTC. To file a complaint about robocalls or spoofed numbers, visit the FCC Consumer Complaint Center. You can also register with the National Do Not Call Registry.
When an area's available number pool runs low, regulators introduce an "overlay" code covering the same territory. Both codes coexist, and new numbers are assigned from whichever has availability. Area code 821 serves the Greenville region in SC, where growing demand for phone numbers necessitated an additional code. This area code shares its region with area code 864. Learn more in our overlay vs split guide.