Ohio 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 15 Ohio codes.

Aggregate footprint: the state's 15 geographic codes currently carry 7,260 active NXX prefixes over 1,174 rate-center anchorings, with 5,127 prefixes in thousands-block pooling. 14 of the codes serve territory inside FCC top-100 metropolitan statistical areas.

Lineage: 220 came out of 740 in 2015; 234 came out of 330 in 2000; 283 came out of 513 in 2023; 326 came out of 937 in 2020; 330 came out of 216 in 1996; 380 came out of 614 in 2016; 436 came out of 440 in 2024; 440 came out of 216 in 1997; 567 came out of 419 in 2002; 740 came out of 614 in 1997; 937 came out of 513 in 1996. The remaining codes (216, 419, 513, 614) date back to the plan's early assignments.

Dialing plans: 14 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 419 (complex 419/567), projected to exhaust 4Q 2041.

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

Code-by-code notes

330 — spawned 234; carved from 216; overlaid by 234; exhaust forecast 3Q 2042.

740 — spawned 220; carved from 614; overlaid by 220; exhaust forecast 2Q 2059.

513 — spawned 937, 283; overlaid by 283; exhaust forecast 3Q 2073.

419 — spawned 567; overlaid by 567; exhaust forecast 4Q 2041.

937 — spawned 326; carved from 513; overlaid by 326; exhaust forecast 4Q 2083.

614 — spawned 740, 380; overlaid by 380; exhaust forecast 3Q 2066.

440 — spawned 436; carved from 216; overlaid by 436; exhaust forecast 2Q 2120.

216 — spawned 330, 440; exhaust forecast 2Q 2044.

567 — carved from 419; overlaid by 419; exhaust forecast 4Q 2041.

234 — carved from 330; overlaid by 330; exhaust forecast 3Q 2042.