| AT&T | telecommunications company, business, enterprise, public company | Dallas | October 5, 1983 |
| Bell Telephone Company | business | — | July 9, 1877 |
| BellSouth | business, enterprise, public company | Atlanta | 1984 |
| Comcast | telecommunications company, business, enterprise, public company | Philadelphia | June 28, 1963 |
| Cox Communications | internet service provider, business | Phoenix | 1962 |
| Globalstar | telecommunications company | Covington | 1998 |
| Iridium Communications | mobile network operator, business, enterprise, public company | McLean | 2001 |
| NBC | radio network, production company, television network | NBC Tower, 10 Universal City Plaza, Stamford, 30 Rockefeller Plaza | 1939 |
| Polycom | business, enterprise, public company | San Jose | 1990 |
| Sprint Corporation | mobile network operator, business, enterprise, public company | Overland Park | 1899 |
| U.S. Cellular | business, enterprise, public company | Chicago | 1983 |
| WarnerMedia | media company, business, enterprise, public company | Delaware, New York City | 2016 |
| Western Electric | organization, business, enterprise | New York City | 1869 |