| Business | Phone |
| Communications Associates 3343 S Scenic Ave, Springfield 65807 | (417) 882-1401 |
| Radio Communications 3107 E Chestnut Expy, Springfield 65802 | (417) 866-2622 |
| Radiophone Engineering Inc 534 W Walnut St, Springfield 65806 | (417) 862-6653 |
| Rayfield Communications 2018 W Woodland St, Springfield 65807 | (417) 887-4663 |