What is 513 area code?

The 513 area code serves the southwestern corner of Ohio, primarily covering the city of Cincinnati and its surrounding areas. It was one of the original area codes established in 1947. Due to population growth and increasing demand for phone numbers, an overlay area code, 828, has been implemented to serve the same geographic region. This means that in addition to the existing 513 numbers, new phone numbers in the area are assigned the 828 area code. Therefore, local calls within the 513/828 region require 10-digit dialing (area code + phone number). The area covered by 513 includes Hamilton County, as well as portions of Butler, Clermont, and Warren counties. It's a significant economic and cultural hub within the state of Ohio.