Indiana | Illinois | Michigan Indiana: History | Northern (219, 260, 269) Central (317, 463, 765) Southern (812, 930) Southern IndianaSouthern Indiana (formerly NPA 812) is covered by two area codes (NPAs) and is divided into five Local Access Transport Areas (LATAs). Area Code 930 was placed in service March 7th, 2015, overlaying the original 812 area code.Permissive 10 digit local dialing began March 1, 2014, with mandatory 10 digit local dialing effective February 7, 2015.  Calls within each LATA (except local calls) are carried by an "Intra-LATA" carrier (intra is within). Calls to another LATA are carried by an "Inter-LATA" carrier (inter is between). To identify their Intra-LATA carrier, customers may call 1+NPA+700-4141 (substituting their NPA for "NPA"). To identify their Inter-LATA carrier customers may call 1-700-555-4141. Each exchange area is connected to a "tandem" for connection to other exchanges and the long distance networks. There are several tandem locations across southern Indiana. The tandems are grouped together to form each LATA. See below for maps of the individual LATAs in southern Indiana. Area Code 812 Area code 812 was one of the initial area codes assigned in 1947. Area Code 930 Area code 930 overlaid all of 812 effective March 7th, 2015. More Information Terre Haute LATA The Terre Haute LATA is located on the west side of Indiana and includes exchanges in Illinois. The tandem for the Terre Haute LATA is located in Terre Haute.  Bloomington LATA The Bloomington LATA is located in southern Indiana. Tandems for the Bloomington LATA are located in Bloomington, Columbus, Seymour and Vincennes.  Cincinatti LATA The Cincinatti LATA is located on the east side of Indiana and includes exchanges in Ohio and Kentucky. The tandem for the Indiana portion of the Cincinatti LATA is located in Cincinatti (Ohio).  Louisville LATA The Louisville LATA is located on the south end of Indiana and includes exchanges in Kentucky. The tandem for the Indiana portion of the Louisville LATA is located in New Albany.  Evansville LATA The Evansville LATA is located on the southern tip of Indiana. Tandems for the Evansville LATA are located in Evansville and Jasper. 
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