| Frontier Communications of the Carolinas Inc. | - | Norwalk, CT | Active |
| Frontier Communications of the South, LLC | - | Norwalk, CT | Active |
| Frontier Communications of the Southwest Inc | - | Norwalk, CT | Active |
| Frontier Florida LLC | - | Norwalk, CT | Active |
| Frontier Midstates, Inc. | - | Norwalk, CT | Active |
| Frontier North, Inc. | - | Norwalk, CT | Active |
| Frontier Southwest Incorporated | - | Norwalk, CT | Active |
| Frontier Telephone of Rochester, Inc. | - | Norwalk, CT | Active |
| Frontier West Virginia Inc. | - | Norwalk, CT | Active |
| Fulton Tel. Co. Inc. | Fulton Telephone Company, Inc. | Bay Springs, MS | Active |
| Gallatin River Communications, LLC | Gallatin River Communications | Monroe, LA | Active |
| Ganado Telephone Company Inc. | Ganado Telephone Company, Inc. | Ganado, TX | Active |
| Garden Valley Telephone Company | - | Erskine, MN | Active |
| Gardonville Coop. Tel. Assn. | - | Brandon, MN | Active |
| Gearheart Communications | Coalfields Telephone Company | Harold, KY | Active |
| Geetingsville Tel. Co. Inc. | Geetingsville Tel. Co., Inc. | Frankfort, IN | Active |
| Geneseo Tel. Co. | Geneseo Telephone Company | Geneseo, IL | Active |
| Georgetown Telephone Co, Inc. | Georgetown Telephone Company, Inc. | Georgetown, MS | Active |
| Georgia Windstream, LLC | Windstream | Little Rock, AR | Active |
| Germantown Independent Tel. Co. | Germantown Independent Telephone Company | Mattoon, IL | Active |
| Germantown Tel. Co. Inc. | Germantown Telephone Co., Inc. | Germantown, NY | Active |
| Gervais Tel. Co. | Gervais Telephone | Gervais, OR | Active |
| Gila River Telecommunications, Inc. | - | Chandler, AZ | Active |
| Glandorf Telephone Co. Inc. | Glandorf Telephone Co., Inc. | Glandorf, OH | Active |
| Glasford Tel. Co. | Glasford Telephone Company | Glasford, IL | Active |
| Glenwood Network Services, Inc. | - | Blue Hill, NE | Active |
| Glenwood Tel. Membership Corp. | Glenwood Telephone Membership Corporation | Blue Hill, NE | Active |
| Glenwood Telephone Company | - | Glenwood, GA | Active |
| Global Valley Networks | - | Stamford, CT | Inactive |
| Golden West Tel. Coop. Inc. | Golden West Telecommunications Cooperative, Inc. | Wall, SD | Active |
| Goldfield Tel. Co. | Goldfield Telephone Company | Goldfield, IA | Active |
| Goodman Tel. Co. | Goodman Telephone Company | Seneca, MO | Active |
| Gorham Tel. Co. Inc. | Gorham Telephone Company | Gorham, KS | Active |
| Goshen Telephone Company | - | Madison, WI | Inactive |
| Grafton Telephone Company | - | Grafton, IL | Active |
| Granada Tel. Co. | Granada Telephone Company | Blue Earth, MN | Active |
| Granby Telephone Company | - | Granby, MO | Active |
| Granby Telephone LLC | - | Oneonta, AL | Active |
| Grand Mound Coop. Tel. Assn. | Grand Mound Cooperative Telephone Association | Grand Mound, IA | Active |
| Grand River Mutual Tel. Corporation | GRM Networks | Princeton, MO | Active |
| Grand Telephone Co. Inc. | Grand Telephone Company, Inc. | Jay, OK | Active |
| Grandview Mutual Tel. Co. | The Grandview Mutual Telephone Co. | Paris, IL | Active |
| Granite State Tel. Inc. | Granite State Telephone, Inc. | Weare, NH | Active |
| Grantland Telecom, Inc. | TDS Telecom | Madison, WI | Active |
| Great Plains Communications Inc. | Great Plains Communications, Inc. | Blair, NE | Active |
| Green Hills Tel. Corp. | Green Hills Telephone Corporation | Breckenridge, MO | Active |
| Gridley Tel. Co. | Gridley Telephone Company | Gridley, IL | Active |
| Griggs County Telephone Company | - | Enderlin, ND | Active |
| Griswold Coop. Tel. Co. | Griswold Cooperative Telephone Company | Griswold, IA | Active |
| Guadalupe Valley Tel. Co-op. Inc. | Guadalupe Valley Telephone Cooperative, Inc. | New Braunfels, TX | Active |