SDN Communications Email Format

TelecommunicationsSouth Dakota, United States51-200 Employees

SDN Communications is a telecommunications company based in Sioux Falls, South Dakota, primarily serving business customers with fiber-based broadband services. It operates a 50,000-mile fiber-optic network that supports voice, data, internet and video transmission for organizations with multiple locations. The company offers connectivity for multi-location offices, dedicated internet access for businesses, and managed services including managed firewalls, routers, and DDoS protection. SDN's network is composed of 17 owner companies, the independent telephone companies of South Dakota. In 2026, SDN partnered with the South Dakota Governor's Office of Economic Development to expand fiber connectivity to underserved rural areas near Pierre, Miller, Huron, and Fort Pierre.

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