| Business | Phone |
| Command Communications Inc 7025 S Fulton St, Centennial 80112 | (303) 792-0890 |
| Communication Transaction Sltn 4901 E Dry Creek Rd, Centennial 80122 | (303) 771-5277 |
| Telesys Communications-Co 7009 S Potomac St, Centennial 80112 | (303) 708-8300 |
| Sunny Communications 15373 E Hinsdale Cir, Centennial 80112 | (720) 870-5056 |