| Business | Phone |
| A-Telelink Herndon 20170 | (703) 810-8400 |
| Crescent Design Inc 2933 West Ox Rd, Herndon 20171 | (703) 860-7766 |
| T-Com Systems 462 Herndon Pkwy 107, Herndon 20170 | (571) 323-1230 |
| Hamrick Telephone Contractors 3139 Kinross Cir, Herndon 20171 | (703) 742-6644 |