Williams Communications Services
- Voice and Data Cabling Services. Servicing Connecticut, Massachusetts, New Hampshire, Vermont and Eastern New York. Located in Herndon.
- http://www.williamscommunications-services.com/

L&S Communications Group Inc.
- Providing quality telephone systems and computer networks and service in and around the Virginia area. Charlottesville
- http://www.lscg.net/

Telesystems, Inc.
- Provides telecommunications equipment solutions. Represent and service several key manufacturers. Lorton
- http://www.telesystemsva.com/

GCI Communications
- Supplies telephone and voice mail systems as well as installation, relocation, sales and service for fiber optic and copper cabling. Located in Alexandria.
- http://www.ggrego.com/

Cousins Communications
- Provides new and used telephone system equipment, installations and repair, voice and data cabling and on-site training.
- http://www.cousinscom.com/

ComLink Telecommunications
- Provides telecommunications systems including telephone, paging, wireless systems, voice and data cabling, voicemail installation and service to Maryland, Virginia and Washington DC businesses.
- http://www.comlinktele.com/

Telelink Communications Inc.
- Business telephone systems, sales and installation, served the Mid-Atlantic Region for telecom service and cabling. Herndon, VA.
- http://www.telelinkcom.com/