With new telephone numbers in high demand, the Tennessee Public Utility Commission approved the addition of the new 729 area code to the existing 423 area code region, which covers two non-contiguous regions in eastern Tennessee, serving communities such as Bristol, Chattanooga, Johnson City and Kingsport, as well as many other smaller communities.
This process is known as an area code overlay. The overlay does not require customers to change their existing area code but will require dialing the area code and the 7-digit telephone number to complete local calls.
All customers with the 423 area code should prepare for 10-digit dialing and the introduction of the new 729 area code…