Markets and Offices

At CornerStone Telephone Company we have a commitment to delivering communication and networking solutions with the highest level of customer support and technical assistance. Our growth strategy has included adding new service markets. We do this by ensuring that we have the facilities, network and the people to support each service area. Our network build-out was completed in 2008, and includes four LATAs (Local Access and Transport Areas). Our services cover the Capital Region, western New York, upstate New York, New York's southern tier, the New York metro area and Hudson Valley, and Western, Massachusetts. We service over 10,000 customers in New York, Massachusetts and Pennsylvania, with over 50,000 access lines offering telephone, Internet, hosting, data center, cloud computing, security services and strategic sourcing. Please contact us at your regional office to find out more about the services available in your area.

Regional Offices

Troy, New York / Capital District

Serving the Capital District, Saratoga and the Adirondacks

Oneonta, NY

Serving Central Leatherstocking Region
34 Main Street, 1st Floor
Oneonta, NY 13820

Syracuse, NY

Serving Finger Lakes and Central New York
4713 Crossroads Park Drive
‪Liverpool, NY 13088‬‬

Poughkeepsie, NY

Serving the Catskills and Hudson Valley
41 Page Park Drive, Suite 102
Poughkeepsie, NY 12603

New York, NY

Serving New York Metro area
50 West 17th Street, 9th Floor
New York, NY 10011

Pittsfield, MA

Serving Western Massachusetts
1416 State Road
Richmond, MA 01254

CornerStone Telephone Company
2 Third Street
Suite 303

Troy, NY   12180

Phone: +1-518-272-1018
Fax: +1-518-273-2750
Toll-free: +1-866-240-1912


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