Tombstone Recording 615-292-9028
When area codes were introduced in October 1947, Tennessee's only area code was 901. During 1954, in a flash-cut, most of the state east of the Tennessee River was assigned 615, while 901 was restricted to Memphis and the western third of the state. This configuration remained in place for over 41 years.
In September 1995, most of the eastern portion of 615--including Chattanooga, Knoxville, and the Tri-Cities--was assigned area code 423. As a result, the state's three area codes were roughly coextensive with the traditional Grand Divisions of Tennessee; 423 served almost all of East Tennessee, 615 served Middle Tennessee and 901 served West Tennessee.
Davidson County - Population 162,878
DeKalb County - Population 71,109
Rutherford County - Population 67,810
Williamson County - Population 66,357
Dickson County - Population 49,666
Cheatham County - Population 39,105