CornerStone has offices across New York State and into western Massachusetts.
If you need to get in touch with our customer service and support team, please call us at the number below, or visit our support page. If you'd like to reach someone on our sales team, please click here.
CornerStone Telephone Company
2 Third Street
Troy, New York 12180
Troy, New York
Serving the Capital District, Saratoga and the Adirondacks
Serving Central Leatherstocking Region
Serving Finger Lakes and Central New York
Poughkeepsie New York
Serving the Catskills and Hudson Valley
Manhattan, New York
Serving New York Metro area
Serving Western Massachusetts