The number 423 has become synonymous with Chattanooga as the area code celebrates its 31st birthday this year. April 23 has even become known as 423 Day in the city. Despite that, 423 still has a ...

GREENEVILLE, Tenn. (WJHL) – Population growth in East Tennessee has required the state to add an additional area code to the current 423 area code. “The North American Numbering Plan administrator ...

CHATTANOOGA, Tenn. (WDEF) — A new area code 729 will soon be added to the existing 423 region, which covers cities like Bristol, Chattanooga, Johnson City, and Kingsport and others. Here’s what you ...

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 ...