812

Area code 812 is an important telephone area code in the North American Numbering Plan, serving the southern third of the state of Indiana. Geographic Coverage: Area code 812 encompasses a significant portion of southern Indiana. It includes major cities such as Evansville, Vincennes, Terre Haute, Bloomington, Columbus, Madison, and Jeffersonville. These cities represent key urban and economic hubs in this region of Indiana​​. Largest City Served: The largest city served by area code 812 is Evansville. Along with Evansville, the area code covers other important cities like Bloomington and Terre Haute. This extensive coverage makes it a vital part of Indiana's telecommunication infrastructure​​​​. Time Zone and Overlay Code: Area code 812 is located in areas that observe both the Central and Eastern time zones. This dual time zone coverage is significant for the region's synchronization with standard timekeeping practices. Additionally, area code 812 has a single overlay, which is area code 930. This overlay serves the same geographic area, allowing for a larger pool of phone numbers within the same region​​​​. In summary, area code 812 is crucial for telecommunications in southern Indiana, covering a wide range of cities and counties. Its establishment and its overlay with area code 930 reflect the evolving telecommunications needs in the region. The area code's coverage of major urban centers like Evansville and its placement in both the Central and Eastern Time Zones are significant operational aspects.