Area codes 812 and 930

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Area codes 812 and 930 cover the southern third of Indiana, including Evansville and its suburbs, parts of the Louisville and Cincinnati metro areas, and cities such as Bedford, Bloomington, Columbus, Greensburg, Jasper, Princeton, Seymour, Terre Haute, and Vincennes. A small area of Kentucky near Evansville is also served.

In 1947, AT&T split Indiana into two area codes: 317 in the north and 812 in the south, a layout that stayed mostly the same for decades. By 2013, 812 was running out of number prefixes, so Indiana added 930 as an overlay—the first overlay in the state. The shortage was driven by more people having cell phones, especially around Evansville and the western Cincinnati suburbs.

A six-month permissive dialing period began March 1, 2014, during which people could dial either seven- or ten-digit numbers in the 812 area. Mandatory ten-digit dialing was planned for September 6, 2014, with 930 numbers available in October. However, the switch was delayed: mandatory ten-digit dialing moved to February 7, 2015, and the first 930 numbers became available on March 7, 2015 to give law enforcement and emergency services time to update equipment.