North American Numbers Source-cited · ownership disclosed
Area code
843
In service
United States · since 1998

Charleston

Created in a 1998 split of area code 803, 843 serves eastern and coastal South Carolina, including Charleston, Myrtle Beach and Hilton Head Island. It is overlaid by 854.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Charleston
Type
geographic
Status
in service
In service since
1998
Projected exhaust
2053 Q1

Status, dates and counts are read from NumberResearch (NANPA / CNAC / FCC records). Assignment records show initial assignees, not the carrier serving a number today.

A · Where it is

Where 843 is

Eastern third and southern tip of South Carolina (Lowcountry, Grand Strand, Pee Dee); 14 counties including Charleston, Horry, Beaufort, Florence, Berkeley, Georgetown and Jasper..

Communities served wholly or partly by 843:

CharlestonMyrtle BeachBeaufortHilton Head IslandFlorence
B · Relationships

How it relates to other codes

The codes 843 was split from, spawned, or shares its area with. A split divides the map and changes some numbers; an overlay shares the same ground and changes none — what's the difference?

Split from · 1998 803 Columbia 843 split off from 803.
Overlay · 2015 854 Charleston (overlay) All-service overlay covering the same coastal/eastern territory.
What's changing. Overlaid by 854 since March 2015; ten-digit dialing mandatory.
C · History

How 843 got here

1998-03-22
Entered service, created in a split of area code 803.
Source: Wikipedia
2015-03-14
Overlay 854 entered service — the state's first all-service overlay.
Source: Wikipedia
2015-09-19
Ten-digit dialing became mandatory.
Source: Wikipedia
D · Capacity

How full it is

Prefixes assigned
800
Prefixes available
0
Thousands-blocks assigned
2,992

Prefix-assignment counts describe allocation to carriers, not how many individual numbers are in use. Full technical records: NumberResearch ↗.

Compare 843 with another code →
Sources
Wikipedia ↗
Area code 843
NumberResearch.org ↗
Live status, dates, assignment counts and exhaust forecast — data as of 2026-09-18 (CC BY 4.0).

Place, relationships and history above are compiled by North American Numbers from the sources listed and last checked 2026-09-18. A check date is not an expert review — see how this is made. Flag an error.