| Business | Phone |
| American Communications Inc 620 Brea Canyon Rd, Walnut 91789 | (626) 458-9698 |
| Itt Worldcom Inc 727 Brea Canyon Rd # 10, Walnut 91789 | (909) 820-5168 |
| U2 Telecommunications 859 N Lorri Way, Walnut 91789 | (626) 626-2990 |
| Victel Co 18856 Amar Rd, Walnut 91789 | (626) 810-3615 |