| Business | Phone |
| Teltech Communications Inc 149 Cambridge St, Cambridge 2141 | (617) 576-0200 |
| Synergy Communications Inc 126 Magazine St, Cambridge 2139 | (617) 497-6565 |
| Navimedix 8 Cambridge Ctr, Cambridge 2142 | (617) 542-0052 |
| Closingbinders.Com 359 Green St, Cambridge 2139 | (617) 873-9221 |
| O A Communications 192 Hamilton St, Cambridge 2139 | (617) 354-9544 |
| Level 3 Communications Llc 101 Main St, Cambridge 2142 | (617) 500-0000 |
| Intershop Communications 245 1st St # 18, Cambridge 2142 | (617) 444-8430 |