Exploring Area Code 864: Cities, Coverage, and More - area-code -

Frequently Asked Questions

Area code 864 covers major South Carolina cities like Greenville, Spartanburg, and Anderson, as well as smaller towns like Greenwood, Gaffney, Clemson, Greer, and Mauldin, primarily in the Upstate region.
Always dial 10 digits (area code + phone number) for all calls within area code 864, even for local calls within the same city or town. This practice is mandatory due to the 821 overlay.
Area code 864 implemented mandatory 10-digit dialing due to the introduction of overlay area code 821 in 2024. Both 864 and 821 serve the same geographic area, requiring 10 digits for all calls within the region.
Area code 821 is the new overlay for 864, implemented in 2024. Both area codes serve the same geographic region in northwestern South Carolina, and 10-digit dialing is required for all calls.
Use 1 + 10-digit dialing when making toll calls from area code 864 to numbers outside the 864/821 area code but still within North America. For operator-assisted calls, dial 0 + 10 digits.
The 864 area code serves a population of over 1.3 million people and encompasses a significant portion of South Carolina's Upstate region, including major economic centers like Greenville.
Update your contact list to include the area code (864) for all contacts within the region. This is important because 10-digit dialing is now mandatory for all calls, even local ones, due to the 821 overlay.
The North American Numbering Plan Administrator (NANPA) regulates area code 864, allocating and managing numbering resources. Oversight is provided by the Federal Communications Commission (FCC) to ensure fair access.
Clemson University is in the 864 area code, which is overlaid with area code 821. Remember to dial 10 digits (including the area code) for all calls to Clemson, even from within the 864/821 area.
Multiple carriers, including major providers like AT&T, Verizon, and T-Mobile, along with smaller companies, offer diverse services in area code 864, creating a competitive telecommunications market.
The 821 area code was added to 864 as an overlay in 2024 due to the continued growth and increasing demand for phone numbers in South Carolina's Upstate region.
Forgetting to dial the area code for 864 will result in an incomplete call. 10-digit dialing, including the area code, is mandatory for all calls within the 864/821 region, even for local calls.
No, you cannot dial 7 digits locally in the 864 area code anymore. 10-digit dialing (including the area code) is mandatory for all calls since the introduction of the 821 overlay in 2024.
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