Ohio
(513) Area Code 513 — Cincinnati, Ohio
513 Area Code – Cincinnati, Ohio: Location, Time Zone & History
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Map of Area Code 513
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History & Cultural Notes
Cincinnati's 513 area code has anchored a major corporate economy since it was assigned in October 1947 as one of the original 86 North American area codes. It originally covered the entire southwestern quadrant of Ohio, including Dayton, until a 1996 split carved out area code 937 for that city and left this numbering plan area focused on the Cincinnati metropolitan area. As the region kept growing, an all-service overlay, 283, was reserved in 2000, briefly activated in 2001, then suspended, and finally brought fully into service in 2023 once the remaining number blocks were exhausted.
The resulting overlay complex is headquarters territory for some of the country's largest companies. Notable employers based here include:
- Procter & Gamble, in consumer packaged goods manufacturing
- Kroger, in grocery retail
- Fifth Third Bank, in banking and financial services
- Cincinnati Children's Hospital Medical Center and TriHealth, in healthcare
- GE Aviation, in aerospace manufacturing
Beyond Cincinnati itself, the numbering plan area extends to Hamilton, Middletown, Mason, Fairfield, and Oxford. Mandatory ten-digit local dialing arrived across this region and neighboring 859 in October 2021, timed with the nationwide rollout of the 988 Suicide & Crisis Lifeline rather than the overlay's introduction.