As a major sponsor, the ISP will provide free Internet access via Wi-Fi hotspots around the Fringe Club, Rundle Mall and other Fringe locations.
Internode has sponsored the Fringe for the past decade.
Internode's Adelaide Fringe sponsorship comes just two weeks after the company's announcement that it is Presenting Partner for next year's WOMADelaide Festival, which runs alongside the Fringe.
Internode founder, Simon Hackett, said, "By providing free wireless Internet access throughout the Adelaide CBD, including at many Fringe venues, Internode helps people to quickly and easily find what shows are on and where they're located."
The 2013 Adelaide Fringe last week unveiled its poster for next year and announced its Fringe 2013 ambassador - comedian, performer and TV host Paul McDermott.