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US area codes

South Carolina area codes

A checked list of 6 in-service geographic area codes in South Carolina, with their dates, overlay partners and dialing rules.

Last checked 14 October 2026

Area codes across North America

Codes in service in South Carolina

South Carolina has 6 geographic area codes in service: 803, 821, 839, 843, 854, 864. 803 is the oldest, dated 1947, and 821 the newest, dated 19 Aug 2024.1 All of South Carolina's codes are on Eastern time.

Area codeNANPA locationNPA in-service dateIn-service overlay peersTime zoneLocal calls within the code
803SC1947839Eastern10 digits
821SC19 Aug 2024864Eastern10 digits
839SC26 May 2020803Eastern10 digits
843SC22 Mar 1998854Eastern10 digits
854SC19 Oct 2015843Eastern10 digits
864SC3 Dec 1995821Eastern10 digits

Scroll the table sideways to see every column. Sources: NANPA (14 October 2026 file).

History and overlays in South Carolina

  • Before 1960: 803 (1947)
  • 1990s: 864 (3 Dec 1995), 843 (22 Mar 1998)
  • 2010s: 854 (19 Oct 2015)
  • 2020s: 839 (26 May 2020), 821 (19 Aug 2024)

South Carolina's in-service overlay groups are 803/839; 821/864; 843/854.1

  • 803/839: 803 (1947) was joined by 839 on 26 May 2020.
  • 821/864: 864 (1995) was joined by 821 on 19 Aug 2024.
  • 843/854: 843 (1998) was joined by 854 on 19 Oct 2015.

Dialing in South Carolina

Local calls within a single area code in South Carolina (803, 821, 839, 843, 854, 864) are all recorded as 10 digits. From any of South Carolina's codes, local calls to another area code are all recorded as 10 digits.1

Neighbours of South Carolina

Regions that border South Carolina:

Rules that apply to every region are on the area-code reference.

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Further reading

Longer research pieces on this topic, each with its own source list and a downloadable PDF.

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Sources

Every regulatory and pricing claim on this page links to the primary source it came from. Figures were checked on the date shown at the top of the page; rules and prices change, so verify before relying on one.

  1. NANPA, NPA Database CSV, file dated 14 October 2026; US geographic codes, location, dates, overlay complexes, dialing plan and time zone. Retrieved 14 Oct 2026
    https://reports.nanpa.com/public/npa_report.csv

Keep reading

Reference
How overlays work
Why two codes can serve the same area and what ten-digit dialling changes.
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