| Business | Phone |
| American Focus Telecom 245 E Main St # 104, Alhambra 91801 | (626) 281-2458 |
| California Telecomm Co 1441 E Valley Blvd, Alhambra 91801 | (626) 300-9077 |
| Diamond Communications 732 S Garfield Ave, Alhambra 91801 | (626) 282-4003 |
| Gracetel 1000 S Fremont Ave # 10115, Alhambra 91803 | (626) 300-0847 |
| Tel-Tech Systems 2946 W Valley Blvd, Alhambra 91803 | (626) 282-8228 |