Experts say such speeds may be impractical and unaffordable for many consumers, but could be attractive for business uses and enable future applications.
Google last year said it plans 1-gig service in parts of metro Atlanta, though it did not set a start date or pricing. Google charges $70 a month for standalone internet in areas where it already offers the service.
Atlanta-based Cox Communications said it has offered gigabit service to businesses for a decade and sells residential gigabit service in six states. It plans to extend that to all 18 states it serves by the end of 2016, though Cox does not serve metro Atlanta. Cox Communications is a unit of Cox Enterprises, whose holdings also include The Atlanta Journal-Constitution.