Mississippi area codes — detailed data

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

Working detail for Mississippi's 5 area codes: history, capacity forecasts and dialing plans, straight from NANPA's NPA database.

Aggregate footprint: the state's 5 geographic codes currently carry 2,046 active NXX prefixes over 323 rate-center anchorings, with 1,528 prefixes in thousands-block pooling. 3 of the codes serve territory inside FCC top-100 metropolitan statistical areas.

Lineage: 228 came out of 601 in 1997; 471 came out of 662 in 2026; 662 came out of 601 in 1999; 769 came out of 601 in 2005. The remaining code (601) dates back to the plan's early assignments.

Dialing plans: 4 codes use plain ten-digit local dialing (10D); 1 still allows seven-digit local calls. 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 601 (complex 601/769), projected to exhaust 3Q 2052.

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

Code-by-code notes

601 — spawned 228, 662, 769; overlaid by 769; exhaust forecast 3Q 2052.

662 — spawned 471; carved from 601; overlaid by 471.

228 — carved from 601; exhaust forecast 3Q 2105.

769 — carved from 601; overlaid by 601; exhaust forecast 3Q 2052.

471 — carved from 662; overlaid by 662.