| Business | Phone |
| A T & T Global Network 1601 Trapelo Rd, Waltham 2451 | (781) 890-9132 |
| X O Communications Inc 1601 Trapelo Rd, Waltham 2451 | (781) 693-3900 |
| Abovenet Communications 1050 Winter St, Waltham 2451 | (781) 530-3667 |
| Exodus Communications-Boston 2 600 Winter St, Waltham 2451 | (781) 839-6100 |
| Starbak Communications 29 Sawyer Rd, Waltham 2453 | (781) 736-1200 |
| Freedom Communications Inc 842 Lexington St, Waltham 2452 | (781) 899-5511 |
| Cypress Communications 1601 Trapelo Rd, Waltham 2451 | (781) 890-4809 |
| Cypress Communications 400 5th Ave, Waltham 2451 | (781) 890-5205 |