List of Ohio area codes

This is a list of area codes in the state of Ohio.

The first nationwide telephone numbering plan of 1947 divided Ohio into four numbering plan areas (NPAs), one each for a quadrant of the state: 216, 419, 513, and 614.

In 1997, 440 and 740 were added in additional area code splits.

In 2015, area code 740 was overlaid with 220, relieving its rapid depletion.

[2][3] Area code 436 went into service on March 1, 2024, as an overlay of 440.