| Business | Phone |
| A T & T 124 Beacon St, Boston 2116 | (617) 267-6948 |
| A T & T Global Network 1 Boylston St # 1, Boston 2116 | (617) 267-0725 |
| Adelphia Business Solutions 2 Oliver St, Boston 2109 | (617) 542-1900 |
| Trans National Communications 133 Federal St, Boston 2110 | (617) 369-1000 |
| Telephone Pioneers-Amer News 99 High St, Boston 2110 | (617) 743-6878 |
| Ssbmci 150 Oliver St, Boston 2110 | (617) 261-1810 |
| Commonwealth Telecommunication 1 Beacon St, Boston 2108 | (617) 742-0029 |