| Business | Phone |
| Covad Communications 8955 Henkels Ln # 507, Annapolis Jct 20701 | (301) 776-4400 |
| Link Communicatiions 8955 Henkels Ln, Annapolis Jct 20701 | (410) 796-3791 |
| Telecom Network Specialists 10830 Guilford Rd, Annapolis Jct 20701 | (301) 483-4002 |
| Xspedius Management Co 131 National Business Pkwy, Annapolis Jct 20701 | (301) 361-4200 |