| Business | Phone |
| Ats Gary Peterson 201 N Minnesota Ave, Sioux Falls 57104 | (605) 339-0200 |
| Ats Gary Peterson 508 E Alder Ln, Sioux Falls 57105 | (605) 339-0200 |
| United Technologies 737 W 10th St, Sioux Falls 57104 | (605) 978-9065 |
| Telephone Systems & Svc 1113 E 14th St, Sioux Falls 57104 | (605) 338-0330 |
| Com Pro Inc 705 E 41st St # 230, Sioux Falls 57105 | (605) 338-8700 |
| Consolidated Business Products 3109 W 41st St # 117, Sioux Falls 57105 | (605) 334-4765 |
| Dial Net 3109 W 41st St # 101a, Sioux Falls 57105 | (605) 335-3932 |
| Phone Guys 4316 S Arden Ave, Sioux Falls 57103 | (605) 332-2144 |
| Heartland Technology Sioux Falls 57104 | (605) 334-9116 |
| Loewenberg Technologies Inc 1000 E Benson Rd, Sioux Falls 57104 | (605) 335-8175 |