Iowa area codes — detailed data

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

Full numbering detail for every active Iowa area code: lineage (which code it split from), NANPA exhaust projections, dialing plans and jeopardy status. This is the working data behind the overview page.

Aggregate footprint: the state's 5 geographic codes currently carry 2,739 active NXX prefixes over 811 rate-center anchorings, with 1,935 prefixes in thousands-block pooling. 3 of the codes serve territory inside FCC top-100 metropolitan statistical areas.

Lineage: 563 came out of 319 in 2001; 641 came out of 515 in 2000. The remaining codes (319, 515, 712) date back to the plan's early assignments.

Dialing plans: 2 codes use plain ten-digit local dialing (10D); 3 still allow 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 641, projected to exhaust 1Q 2037.

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

Code-by-code notes

712 — exhaust forecast 2Q 2039.

641 — carved from 515; exhaust forecast 1Q 2037.

515 — spawned 641; exhaust forecast 2Q 2042.

319 — spawned 563; exhaust forecast 1Q 2048.

563 — carved from 319; exhaust forecast 4Q 2076.