| Tularosa Basin Telephone Company, Inc. | Tularosa Basin Telephone Company | Tularosa, NM | Active |
| Turtle Mountain Communications, Inc. | - | Langdon, ND | Active |
| Twin Lakes Tel. Coop. Corp. | Twin Lakes Telephone Cooperative Corporation | GAINESBORO, TN | Active |
| Twin Valley Telephone Co.,Inc. | Twin Valley Telephone Co., Inc. | Miltonvale, KS | Active |
| Twin Valley-Ulen Tel. Co. Inc. | Twin Valley Ulen Telephone Company | Perham, MN | Active |
| UBET Telecom, Inc. | - | Roosevelt, UT | Inactive |
| UBTA-UBET Communications, Inc. | Strata Networks | Roosevelt, UT | Active |
| UTELCO, Inc. | TDS Telecom | Madison, WI | Active |
| Union River Telephone Company | - | Aurora, ME | Active |
| Union Springs Telephone Company, Inc. | - | Union Springs, AL | Active |
| Union Tel. Co. | Union Telephone Company | Dell Rapids, SD | Inactive |
| Union Telephone Co. | Union Telephone Company | Plainfield, WI | Active |
| Union Telephone Company | TDS Telecom | Madison, WI | Active |
| United Farmers Tel. Co. | United Farmers Telephone Company | Everly, IA | Active |
| United KUC, Inc. | - | Anchorage, AK | Active |
| United Tel. Assn. Inc. | United Telephone Association, Inc. | Dodge City, KS | Active |
| United Tel. Co. Inc. - TN | United Telephone Co. | Chapel Hill, TN | Active |
| United Telephone Mutual Aid Corp. | United Telephone Mutual Aid Corporation | Langdon, ND | Active |
| United Utilities Inc. | United Utilities, Inc. | Anchorage, AK | Active |
| Unitel, Inc. | - | Unity, ME | Active |
| Universal Communications of Allison | - | Dumont, IA | Inactive |
| Upper Peninsula Telephone Company | - | Carney, MI | Active |
| Upsala Coop. Tel. Assn. | Upsala Cooperative Telephone Assoc. | Upsala, MN | Active |
| Valley Tel. Co. - MN | Valley Telephone Company | Underwood, MN | Active |
| Valley Telecommunications Cooperative. Assn., Inc. | Valley Telecommunications Cooperative Association, | Herreid, SD | Active |
| Valley Telecommunications, Inc. | - | Scobey, MT | Inactive |
| Valley Telephone Co., LLC | - | West Point, GA | Active |
| Valley Telephone Cooperative, Inc. | - | Raymondville, TX | Active |
| Valley Telephone Cooperative, Inc. | - | Willcox, AZ | Active |
| Valliant Tel. Co. | Valliant Telephone Company | Valliant, OK | Active |
| Valor Telecom of Texas, LP | - | Little Rock, AR | Active |
| Valor Telecommunications of New Mexico, LLC | Valor Telecom of New Mexico, LLC | Irving, TX | Inactive |
| Valor Telecommunications of Oklahoma, LLC | - | Irving, TX | Inactive |
| Van Buren Tel. Co. Inc. | Van Buren Telephone Company, Inc. | Keosauqua, IA | Active |
| Van Horne Coop. Tel. Co. | Van Horne Cooperative Telephone Co. | Van Horne, IA | Active |
| Vanlue Tel. Co. dba TDS Telecom | The Vanlue Telephone Company | Madison, WI | Active |
| Vaughnsville Tel. Co. Inc. | The Vaughnsville Telephone Company, Inc. | Vaughnsville, OH | Active |
| Ventura Tel. Co. Inc. | Ventura Telephone Company, Inc. | Clear Lake, IA | Active |
| Venture Communications Cooperative | - | Highmore, SD | Active |
| Venus Tel. Corp. | Venus Telephone Corporation | Venus, PA | Active |
| Verizon - Delaware, Inc. | Verizon Delaware LLC | New York, NY | Active |
| Verizon - Maryland, Inc. | Verizon | New York, NY | Active |
| Verizon - New Jersey, Inc. | Verizon NEW JERSEY, INC. | New York, NY | Active |
| Verizon - New York Inc. | VERIZON NEW YORK INC | New York, NY | Active |
| Verizon - Pennsylvania, Inc. | Verizon PENNSYLVANIA, INC. | New York, NY | Active |
| Verizon Midwest | Verizon Midwest, Inc. | New York, NY | Inactive |
| Verizon New England, Inc. | - | New York, NY | Active |
| Verizon North LLC | - | New York, NY | Active |
| Verizon South, Inc. | - | New York, NY | Active |
| Verizon- Washington, D.C. Inc. | VERIZON WASHINGTON, D.C. INC. | New York, NY | Active |