| Progressive Rural Tel. Coop. Inc. | Progressive Rural Telephone Cooperative, Inc. | Rentz, GA | Active |
| Project Mutual Tel. Coop. Assn. Inc. | Project Mutual Telephone | Rupert, ID | Active |
| Project Tel. Co. Inc. | Project Telephone Company | Scobey, MT | Active |
| Public Service Telephone Company | - | Reynolds, GA | Active |
| Puerto Rico Telephone Company, Inc. | - | San Juan, PR | Active |
| Pulaski-White Rural Tel. Coop. Inc. | Pulaski White Rural Telephone Cooperative, Inc. | Buffalo, IN | Active |
| Pymatuning Independent Tel. Co. | Pymatuning Independent Telephone Company | MACCLENY, FL | Active |
| Quincy Telephone Co. | TDS Telecom | Madison, WI | Active |
| Qwest Corporation | CenturyLink QC | Monroe, LA | Active |
| RC Communications, Inc. | - | New Effington, SD | Inactive |
| RT Communications, Inc. | - | Worland, WY | Active |
| Radcliffe Tel. Co. Inc. | Radcliffe Telephone Company, Inc. | Radcliffe, IA | Active |
| Ragland Tel. Co. Inc. | Ragland Telephone Company, Inc. | Ragland, AL | Active |
| Rainbow Telecommunications Association, Inc. | Rainbow Telephone Co-op Assoc., Inc. | Everest, KS | Active |
| Randolph Tel. Co. | Randolph Telephone Company | Asheboro, NC | Inactive |
| Randolph Tel. Membership Corp. | Randolph Telephone Membership Corporation | Asheboro, NC | Active |
| Range Tel. Coop., Inc. - MT | Range Telephone Coop., Inc. | Forsyth, MT | Active |
| Readlyn Tel. Co. | Readlyn Telephone Company | Readlyn, IA | Active |
| Reasnor Telephone Company | - | Sully, IA | Active |
| Red River Rural Telephone Assoc. | Red River Rural Telephone Association, Inc. | Abercrombie, ND | Active |
| Red River Telecom, Inc. | - | Abercrombie, ND | Inactive |
| Redwood County Telephone Company, Inc. | Arvig Communication Systems | Perham, MN | Active |
| Reservation Telephone Cooperative | - | Parshall, ND | Active |
| Reynolds Tel. Co. | Reynolds Telephone Company | Reynolds, IL | Active |
| Rhinelander Telephone Company. | - | Norwalk, CT | Inactive |
| Rice Belt Tel. Co. | Rice Belt Telephone Company | Ellettsville, IN | Active |
| Richland-Grant Telephone Cooperative, Inc. | - | Blue River, WI | Active |
| Richmond Tel. Co. | Richmond Telephone Company | Troy, NY | Inactive |
| Rico Telephone Company | - | ROCKLAND, ID | Active |
| Ridgeway Tel. Co. Inc. | Ridgeway Telephone Company | Chester, SC | Active |
| Ringgold Tel. Co. | Ringgold Telephone Company | Ringgold, GA | Active |
| Ringsted Tel. Co. | Ringsted Telephone Company | Ringsted, IA | Active |
| Rio Virgin Telephone Co. Inc. | Rio Virgin Telephone Company | Estacada, OR | Active |
| River Valley Tel. Coop. | River Valley Telecommunications Coop | Graettinger, IA | Active |
| Riverside Telecom, Inc. | TDS Telecom | Madison, WI | Active |
| Riviera Telephone Company, Inc. | - | Riviera, TX | Active |
| Roanoke Telephone Co. Inc. | Roanoke Telephone Co., Inc. | Jackson, MS | Active |
| Roberts County Tel. Coop. Assn. | Roberts County Telephone Cooperative Association | New Effington, SD | Active |
| Rochester Tel. Co. Inc. | Rochester Telephone Company, Inc. | Rochester, IN | Active |
| Rock County Tel. Co. | Rock County Telephone Company | Blair, NE | Active |
| Rock Port Tel. Co. | Rock Port Telephone Company | Rock Port, MO | Active |
| Rockwell Coop. Tel. Assn. | Rockwell Cooperative Telephone Association | Rockwell, IA | Active |
| Roggen Tel. Coop. Co. | Roggen Telephone Cooperative Company | Roggen, CO | Active |
| Ronan Telephone Company, A MT Corporation | Ronan Telephone Company | Ronan, MT | Active |
| Roome Telecommunications, Inc. | - | Halsey, OR | Active |
| Roosevelt County Rural Tel. Coop. Inc. | Roosevelt County Rural Telephone Cooperative, Inc. | Portales, NM | Active |
| Rothsay Tel. Co. Inc. | Rothsay Telephone Company, Inc. | Underwood, MN | Active |
| Runestone Tel. Assn. | Runestone Telephone Association | Hoffman, MN | Active |
| Rural Tel. Service Co. Inc. | Nex-Tech | Lenora, KS | Active |
| Rural Telephone Company | - | Glenns Ferry, ID | Active |