| Business | Phone |
| Acuity Systems 11921 Freedom Dr, Reston 20190 | (703) 464-4700 |
| Alcatel Data Networks 12490 Sunrise Valley Dr, Reston 20191 | (703) 689-7400 |
| Atlas Telecom Svc Usa 11410 Isaac Newton Sq N 212, Reston 20190 | (703) 668-0731 |
| Avaya Inc 1800 Robert Fulton Dr 200, Reston 20191 | (703) 390-8200 |
| China Network Solutions Ltd 12020 Sunrise Valley Dr, Reston 20191 | (703) 390-1136 |
| Cross Media Corp 11343 Sunset Hills Rd, Reston 20190 | (703) 561-4377 |
| Discovery Tel 11410 Isaac Newton Sq N # 101, Reston 20190 | (703) 707-0959 |
| Fibertower Corp 12007 Sunrise Valley Dr # 280, Reston 20191 | (703) 860-4464 |
| Global Naps 12347 Sunrise Valley Dr E, Reston 20191 | (703) 391-8057 |
| Vcomm 1956 Lakeport Way, Reston 20191 | (703) 648-3900 |
| Verizon 1880 Campus Commons Dr, Reston 20191 | (703) 860-1165 |
| Verizon 1830 Campus Commons Dr, Reston 20191 | (703) 295-4800 |
| Tel-Save.Com 12020 Sunrise Valley Dr 250, Reston 20191 | (703) 391-7500 |
| Telecom 11130 Sunrise Valley Dr, Reston 20191 | (703) 860-1137 |
| Telecom Test Gears Inc 11921 Freedom Dr, Reston 20190 | (703) 925-5930 |
| Koodie Telecom 11513 Sunset Hills Rd, Reston 20190 | (703) 481-2487 |
| Mci 2100 Reston Pkwy, Reston 20191 | (703) 715-7000 |
| Qwest Solutions Ctr 10700 Parkridge Blvd 180, Reston 20191 | (703) 264-2360 |
| Netgain Communications 1775 Wiehle Ave, Reston 20190 | (703) 742-3755 |
| Opt Inc 11252 Center Harbor Rd, Reston 20194 | (703) 709-0900 |