| Business | Phone |
| Cal-Tech & Assoc Inc 13505 A St, Omaha 68144 | (402) 330-3970 |
| Communication Services Inc 10180 L St, Omaha 68127 | (402) 597-3333 |
| Diversified Electronics Omaha 68134 | (402) 572-6851 |
| Omaha Business Telephone 5105 Center St, Omaha 68106 | (402) 556-2322 |