Consists of those companies, associations, cooperatives, corporations and similar entities that are directly engaged or about to engage (in whole or part) in providing telecommunications services in the western United States.
Consists of those companies, associations, cooperatives, corporations and similar entities that are directly engaged or about to engage (in whole or part) in providing telecommunications services in the eastern United States.
(Associate Members) Consists of any entity that provides products and services to Category I or Category II members.
