Hacker News Reader

(This is also the top google result)

The population in 2018 was 27M, probably much higher now.

It also includes cities in north and north central Alabama (Birmingham and Huntsville) and Nashville and Memphis

Includes most of Tennessee as well - Nashville, Knoxville, Memphis and Chattanooga are in this group.

Knoxville and Chattanooga I can see, but not Nashville or Memphis.

The former are close enough that I understand their inclusion. But the latter are not.