South Carolina area codes — detailed data

NANPA NPA database, current as of July 28, 2026.

This page expands the state overview with per-code operational data from NANPA: parent codes, projected exhaust dates, dialing patterns and relief status for all 6 South Carolina codes.

Aggregate footprint: the state's 6 geographic codes currently carry 2,721 active NXX prefixes over 370 rate-center anchorings, with 1,951 prefixes in thousands-block pooling. 6 of the codes serve territory inside FCC top-100 metropolitan statistical areas.

Lineage: 821 came out of 864 in 2024; 839 came out of 803 in 2020; 843 came out of 803 in 1998; 854 came out of 843 in 2015; 864 came out of 803 in 1995. The remaining code (803) dates back to the plan's early assignments.

Dialing plans: 6 codes use plain ten-digit local dialing (10D). Overlay territories always dial ten digits; the 2021 988-hotline transition moved most others to ten digits as well.

The tightest capacity in the state is 803 (complex 803/839), projected to exhaust 1Q 2046.

Status: no South Carolina code is currently in jeopardy or active relief planning — capacity is adequate near-term per NANPA.

Code-by-code notes

864 — spawned 821; carved from 803; overlaid by 821; exhaust forecast 3Q 2054.

803 — spawned 864, 843, 839; overlaid by 839; exhaust forecast 1Q 2046.

843 — spawned 854; carved from 803; overlaid by 854; exhaust forecast 1Q 2053.

854 — carved from 843; overlaid by 843; exhaust forecast 1Q 2053.

839 — carved from 803; overlaid by 803; exhaust forecast 1Q 2046.

821 — carved from 864; overlaid by 864; exhaust forecast 3Q 2054.