TCO is a nationwide telecommunications provider offering a full range of voice and data services for business customers. TCO, headquartered in Elm Grove, Wisconsin with operations in Wallingford, Connecticut, is a successor company to TCO Network Services (est. 1989).

Whether your need is for sophisticated network architecture for data transmission or simple, cost-effective telephone service, TCO can provide the solution. Our service is supported by the nation’s top worldwide intelligent networks, and it’s with these capabilities that we remain competitive and prepared for the future. Our philosophy is simple: always emphasize customer service and satisfaction.