| Business | Phone |
| Tele Providers 758 E Colorado Blvd, Pasadena 91101 | (626) 683-8386 |
| Harris-Mcs 555 S San Rafael Ave, Pasadena 91105 | (626) 441-4573 |
| Tech Knowledge Inc 200 E Del Mar Blvd # 300, Pasadena 91105 | (626) 844-1000 |
| Telecom 611 Pasadena 91105 | (626) 683-2949 |