Association of Communications Enterprises (ASCENT)
http://www.ascent.org/

CLEC
http://www.clec.com/

Federal Communications Commission (FCC)
http://www.fcc.gov/

National Cable & Telecommunications Association (NCTA)
http://www.ncta.com/

National Exchange Carrier Association (NECA)
http://www.neca.org/

National Rural Telecommunications Association (NRTA)
http://www.nrtc.org/

National Telephone Cooperative Association (NTCA)
http://www.ntca.org/

Organization for the Promotion and Advancement of Small Telecommunications Companies (OPASTCO)
http://www.opastco.org/

Telecommunications Industry Association (TIA)
http://www.tiaonline.org/

TeleStrategies
http://www.telestrategies.com/

United States Telecom Association (USTA)
http://www.usta.org/