Area codes 440 and 436

This area code was therefore scheduled to transition to ten-digit dialing by October 24, 2021.

[3] In December 2022, the Public Utilities Commission of Ohio announced a projection that the pool of available telephone numbers for the 440 area code would be exhausted by the third quarter of 2024.

[4] Area codes 440 and 436 serves most of the southern, western, and eastern suburbs of Cleveland, including the larger cities and communities of Ashtabula, Chardon, Eastlake, Elyria, Lorain, Mentor, North Olmsted, North Ridgeville, North Royalton, Parma, Solon, Strongsville, Westlake and Willoughby.

The largest city in the numbering plan area is Parma, Ohio.

[8] The numbering plan area is just barely contiguous, joined by a narrow section in the south.