- Alcatel-Lucent
- Alltel
- American Tower
- Anadarko Petroleum
- Antero Resources
- AT&T Broadband
- AT&T Wireless
- Baran Telecom
- Bechtel
- BP Production
- CH2MHill
- Chesapeake Energy Corp.
- Cingular Wireless
- Cimarex Energy
- Clearshot
- Clearwire Wireless Broadband
- Cox Communications
- Cricket Communications
- Crusader Energy
- Devon Energy
- Divine Tower
- Dobson Communications
- Encana
- Ericsson
- Exi Parson's Telecom
- General Dynamics
- Geotek Communications
- Gilbert Southern
- Goodman Networks
- Itron
- Level 3 Communications
- Lucent Technologies
- Mustang Fuel Corproation
- NextLink
- Nextel Communications
- Nextel Partners
- Newfield Exploration
- Noble Energy
- Nortel Networks
- NorthStar
- Oklahoma Gas & Electric
- Pacific 17
- Pagenet
- Panther Energy
- Parsons
- Questar
- Samson Resources
- SkyTel
- Southern California Edison
- SpectraSite Communications
- Sprint-Nextel
- Sprint PCS
- Sprint Sites USA
- Sprint Spectrum
- St. Mary Land & Exploration
- T-Mobile
- TCI
- Teligent
- Tellaire
- Texas Communications
- Traverse Bay
- Unit Petroleum
- U.S. Cellular
- Western Wireless
- White Pine Wireless, LLC
- Williams Energy
- XTO Energy