M
- Mas Communications, Inc.Pierre, SD
- Mccook County Emergency Medical ServiceSalem, SD
- Metro CommunicationsSioux Falls, SD
- Metro Communications AgencySioux Falls, SD
- Michael A LeesRapid City, SD
- Midco Diving & Marine Services IncRapid City, SD
- Midco Diving & Marine Svcs IncRapid City, SD
- Midcontinent CommunicationsSioux Falls, SD
- Milbank Communications IncMilbank, SD
- Milbank Communications Inc.New Effington, SD
- Minnesota Tower Systems IncWatertown, SD
- Moerke, NormaAberdeen, SD
- Moerke, RolandAberdeen, SD
- Moerke, Roland LAberdeen, SD
- Moerke, Roland:moerke, Norma Dba Dakota ElectronicsAberdeen, SD
- Moir, GarySioux Falls, SD
- MT Coolidge IncRapid City, SD
- Muth Electric, Inc.Mitchell, SD
N
P
Q
R
- Radiotronics, Inc.Sioux Falls, SD
- Rapid Fire Protection, Inc.Rapid City, SD
- RC Technologies CorporationNew Effington, SD
- Rees CommunicationsFt. Pierre, SD
- Ribob & Eljim A SD PartnershipSioux Falls, SD
- Rivett Construction IncAberdeen, SD
- Rosebud Sioux TribeRosebud, SD
- Rushmore Electric Power Cooperative IncRapid City, SD
- Rushmore EngineeringRapid City, SD
S
- S & S CommunicationsAberdeen, SD
- Santel Communications Cooperative, Inc.Woonsocket, SD
- Schwan Electric, Inc.Aberdeen, SD
- Sioux Falls Electric, LlcSioux Falls, SD
- Sioux Falls Tower Specialists IncSioux Falls, SD
- Sioux Falls VASioux Falls, SD
- Soehl Electronics IncSioux Falls, SD
- South Dakota Geological SurveyVermillion, SD
- South Dakota Network, LlcSioux Falls, SD
- Splitrock Properties, Inc.Garretson, SD
- Startak Fiber LlcSioux Falls, SD
- Stockholm Tower CompanyPierre, SD
- Sully Buttes Telephone Coop IncHighmore, SD
- Sumption, LesAberdeen, SD
- Sumption, LesBath, SD
- Sumption, Les: Swearingen, MattBath, SD
- Sumption, Leslie SBath, SD
- Swearingen, MattAberdeen, SD
- Swiftel CommunicationsBrookings, SD
- Sws LlcqKimball, SD