Located in the Central (GMT -06:00) time zone. Area code 629 serves the state of Tennessee. This area code was assigned on October 23rd, 2013. On March 28th, 2015 it went into service. 629 is a General Purpose Code. 629 service area does overlap with 615 area codes. Dialing pattern for local calls within the same NPA (area code) is 10D.