About Us

Cornerstone Communications, LLC, dba MaineStream Internet, is a Maine family-owned and operated company headquartered in Charleston, Maine. Cornerstone was certified in 2003 by the Maine Public Utilities Commission as a Competitive Local Exchange Company (CLEC), to do business as a competitor in areas then served by Bell Atlantic (now FairPoint New England).


We began with the goal of providing affordable high-speed internet service to Rural Maine, especially Western Penobscot and Southern Piscataquis counties and other such areas not served by either Verizon/FairPoint, Cable or other ISPs.  We now serve over 35 communities, including the city of Bangor.


But MaineStream is not just an internet company. We also provide high-quality phone service (business and residential) within most of our
service area. Ask about our packages that include high-speed internet and phone...and we will save you money over your traditional phone service.

We are constantly expanding, so if you would like to know if we can serve you, contact us at 564-5000, and one of our friendly staff members will see what we can do for you.


We are locally owned and operated. All of our employees live within the MaineStream service area -- right here in central Maine.

For whatever season of life you find yourself in, MaineStream wants to be there for you!