The Granby Telephone and Telegraph Co. of Mass. is an independent local telephone and internet service provider located in Western Massachusetts. The company is owned by Otelco and does business as OTT Communications. Area code: 413 Exchange: 467 References External links 1903 establishments in Massachusetts American companies established in 1903 Otelco Telecommunications companies based in Massachusetts Telecommunications companies established in 1903 Telecommunications companies of the United States