South Carolina · Eastern Time
843 Area Code
Area code 843 is in South Carolina, serving coastal South Carolina, from Hilton Head through Charleston to Myrtle Beach and Florence. It is in the Eastern Time zone. It shares its territory with overlay code 854, so 10-digit dialing is required.
Last updated October 1, 2026 · Source: NANPA
Where is the 843 area code?
843 is a South Carolina area code covering coastal South Carolina, from Hilton Head through Charleston to Myrtle Beach and Florence. In the wider directory it sits in the South region.
Cities in the 843 area code
- Charleston
- North Charleston
- Mount Pleasant
- Myrtle Beach
- Summerville
- Florence
- Hilton Head Island
- Goose Creek
- Conway
- Bluffton
- Beaufort
- Hanahan
- Georgetown
- Darlington
Counties served by 843
Charleston County, Berkeley County, Dorchester County, Horry County, Florence County, Beaufort County, Georgetown County, Jasper County, Colleton County and Darlington County.
843 overlay codes and dialing
The 843 territory is covered by an overlay of 2 area codes: 843, 854. All of them serve the same geographic area, and the original code is 843. Because more than one code covers the same ground, 10-digit dialing is mandatory — you must dial the area code for every local call. New phone lines may be assigned any of these codes.
History of the 843 area code
843 went into service on March 22, 1998, created when it was split from 803. It serves Charleston and the surrounding part of South Carolina, and today shares its territory with overlay code 854. For how codes are created, split, and overlaid, see how area codes work.
Is 843 a scam or spam risk?
843 is a legitimate geographic area code, not a premium or toll line, so a call from it costs you nothing extra. That said, scammers frequently spoof real local area codes to look familiar on caller ID. A genuine 843 number on your screen is no guarantee the caller is in Charleston, SC or trustworthy. See spam & scam-risk area codes for how spoofing works and how to respond.
Other South Carolina area codes
Explore more
See every code in South Carolina, compare codes across the South region, or view all Eastern Time codes. You can also browse the 8XX block or the complete numeric list of US area codes.
New to how this all works? Start with how area codes work, then read up on overlays, 10-digit dialing, and spam & scam-risk codes. To check another number, use the area code lookup tool.
Quick answers
843 area code FAQ
Where is the 843 area code?
The 843 area code is in South Carolina, covering coastal South Carolina, from Hilton Head through Charleston to Myrtle Beach and Florence, in the South region.
What cities are in the 843 area code?
Cities in the 843 area code include Charleston, North Charleston, Mount Pleasant, Myrtle Beach, Summerville, Florence, Hilton Head Island, Goose Creek, Conway and Bluffton.
What time zone is 843 in?
843 is in the Eastern Time zone.
What is the overlay for the 843 area code?
843 shares its territory with 854. Both codes (843, 854) serve the same area, so 10-digit dialing is required for every call.
When did the 843 area code start?
843 went into service on March 22, 1998.
Do I have to dial 10 digits for 843?
Yes. Because 843 is an overlay area, you must dial the full 10-digit number (area code + 7 digits) for every call.
Is 843 a toll-free or premium code?
No. 843 is a standard geographic area code, so calling it costs the same as any local or long-distance call on your plan. Toll-free calls use 800, 888, 877, 866, 855, 844 or 833.