Middle Tennessee will be getting a new area code in 2015. The Tennessee Regulatory Authority has decided to go with a second area code for the area currently served by 615, but consumers will get to keep their current phone numbers. The TRA chose the “overlay” option that means beginning in Spring 2015, new residential and business phone numbers will be issued under the 629 area code. Both 615 and 629 will serve the same geographic area, meaning all calls placed will require dialing the full 10-digit number. The North American Numbering Plan Administrator notified the TRA that the 615 area code would run out of numbers by mid-2015. After conducting a survey of residents in the 615 area code, TRA Chairman Jim Allison said the results were overwhelmingly in favor of an overlay instead of splitting the area into two area codes, meaning about half the numbers would have to be changed. Allison said the TRA believes the overlay plan will be the “least disruptive” to consumers. The overlay plan means nobody will have to change their current phone numbers, but the TRA will set a date in early 2015 that 629 numbers will begin being issued and all calls will require 10-digit dialing. Allison stressed that the new area code does not mean calls within the region will become long distance. He said all calls that are currently local calls will remain local even to numbers with the new 629 area code. The date for the start of 10-digit dialing will be announced in the future. The plan administrator announced the selection of 629 as Tennessee’s seventh area code on Thursday after TRA chose to institute the state’s first overlay. All of Tennessee started off under the 901 area code in 1947. East and Middle Tennessee split into 615 in 1954, then East Tennessee got its own 423 area code 41 years later. Middle Tennessee split in 1997 when the outer ring of counties was placed under 931. East Tennessee split with the addition of 865 in 2000 and West Tennessee split with Memphis remaining in 901 and most of the rest of the region going under 731 in 2002.