| 0001 | WorldCom Inc. | Valhalla | NY | USA |
| 0006 | WorldCom Inc. | Valhalla | NY | USA |
| 0008 | WorldCom Inc. | Valhalla | NY | USA |
| 0021 | WorldCom Inc. | Valhalla | NY | USA |
| 0050 | WorldCom Inc. | Valhalla | NY | USA |
| 0053 | WorldCom Inc. | Valhalla | NY | USA |
| 0055 | WorldCom Inc. | Valhalla | NY | USA |
| 0079 | Windstream D&E Systems, Inc. | Little Rock | AR | USA |
| 0085 | WesTel, Inc. | Austin | TX | USA |
| 0090 | WesTel, Inc. | Austin | TX | USA |
| 0147 | Windstream NuVox , Inc. | Little Rock | AR | USA |
| 0275 | WorldXChange Corp. | San Diego | CA | USA |
| 0290 | WorldCom Inc. | Valhalla | NY | USA |
| 0311 | WorldCom Inc. | Valhalla | NY | USA |
| 0312 | WorldCom Inc. | Valhalla | NY | USA |
| 0408 | WorldCom Inc. | Valhalla | NY | USA |
| 0421 | WorldCom Inc. | Valhalla | NY | USA |
| 0442 | WorldCom Inc. | Valhalla | NY | USA |
| 0446 | WorldCom Inc. | Valhalla | NY | USA |
| 0450 | WorldCom Inc. | Valhalla | NY | USA |
| 0456 | WorldCom Inc. | Valhalla | NY | USA |
| 0464 | WorldCom Inc. | Valhalla | NY | USA |
| 0488 | WorldCom Inc. | Valhalla | NY | USA |
| 0495 | Winstar Communications LLC | Newark | NJ | USA |
| 0502 | WorldXChange Corp. | San Diego | CA | USA |
| 0523 | WorldCom Inc. | Valhalla | NY | USA |
| 0525 | Windstream Lexcom Long Distance, LLC | Little Rock | AR | USA |
| 0535 | WorldCom Inc. | Valhalla | NY | USA |
| 0555 | WorldCom Inc. | Valhalla | NY | USA |
| 0584 | W.T. Services, Inc. | Hereford | TX | USA |
| 0589 | WorldCom Inc. | Valhalla | NY | USA |
| 0621 | Winstar Communications LLC | Newark | NJ | USA |
| 0629 | WorldXChange Corp. | San Diego | CA | USA |
| 0643 | Winstar Communications LLC | Newark | NJ | USA |
| 0648 | Winstar Communications LLC | Newark | NJ | USA |
| 0649 | Working Assets | San Francisco | CA | USA |
| 0742 | WorldCom Inc. | Valhalla | NY | USA |
| 0751 | WorldCom Inc. | Valhalla | NY | USA |
| 0781 | WorldxChange Corp. | San Diego | CA | USA |
| 0789 | WorldCom Inc. | Valhalla | NY | USA |
| 0797 | WorldCom Inc. dba Touch One Long Distance | Valhalla | NY | USA |
| 0800 | WorldCom Inc. | Valhalla | NY | USA |
| 0801 | WorldCom Inc. | Valhalla | NY | USA |
| 0810 | Winstar Communications LLC | Newark | NJ | USA |
| 0824 | WorldCom Inc. | Valhalla | NY | USA |
| 0834 | WorldxChange Corp. | San Diego | CA | USA |
| 0840 | World Pass Communications Corp. | --- | -- | USA |
| 0846 | WorldCom Inc | Valhalla | NY | USA |
| 0868 | WorldCom Inc. | Valhalla | NY | USA |
| 0893 | Windstream Communications, Inc. | Matthews | NC | USA |
| 0910 | WorldCom Inc. | Valhalla | NY | USA |
| 0933 | Windstream D&E Systems, Inc. | Little Rock | AR | USA |
| 0953 | WorldCom Inc. | Valhalla | NY | USA |
| 0981 | Warwick Valley Long Distance Co., Inc. | Warwick | NY | USA |
| 0982 | Wide Voice, LLC | Long Beach | CA | USA |
| 0995 | WorldCom Inc. | Valhalla | NY | USA |
| 0999 | WorldCom Inc. | Valhalla | NY | USA |
| 1100 | Win.Net Telecommunications, Inc. | Louisville | KY | USA |
| 1102 | Wildflower Telecommunications, LLC | Buhler | KS | USA |
| 1273 | Westport Telephony Company Limited | Westport | ON | CANADA |
| 2461 | Waldron Communication Co. | Waldron | MI | USA |
| 3210 | WorldNet Telecommunications Inc. | Guaynabo | PR | USA |
| 3211 | WorldNet Telecommunications Inc. | Guaynabo | PR | USA |
| 3366 | Windstream NuVox, Inc. | Little Rock | AR | USA |
| 4343 | WWC, Inc. dba Solution Long Distance | Bruce | MS | USA |
| 5002 | Windstream Conestoga, Inc. | Little Rock | AR | USA |
| 5003 | Windstream D&E Systems, Inc. | Llittle Rock | AR | USA |
| 5094 | Westphalia Broadband, Inc. | Westphalia | MI | USA |
| 5102 | WilTel Communications, LLC | Tulsa | OK | USA |
| 5138 | Who Ever | Arlington | TX | USA |
| 5144 | Wiphonica Technologies, Inc. | Apex | NC | USA |
| 5158 | WilTel Communications, LLC | Tulsa | OK | USA |
| 5175 | Winstar Communications LLC | Newark | NJ | USA |
| 5200 | WorldXChange Corp. | San Diego | CA | USA |
| 5261 | Webster-Calhoun Long Distance | Gowrie | IA | USA |
| 5268 | Westgate Communications, L.L.C. | Chelan | WA | USA |
| 5277 | Wilton Telephone Company | Wilton | IA | USA |
| 5335 | WorldXChange Corp. | San Diego | CA | USA |
| 5338 | Windstream D&E, , Inc. | Little Rock | AR | USA |
| 5358 | Wes-Tex Telecommunications | Stanton | TX | USA |
| 5366 | Windstream NuVox, Inc. | Little Rock | AR | USA |
| 5435 | West Kentucky Networks, Inc. | Mayfield | KY | USA |
| 5496 | Windstream NuVox, Inc. | Little Rock | AR | USA |
| 5535 | Windstream Lakedale Link, Inc. | Little Rock | AR | USA |
| 5547 | Walnut Hill Telephone Company | Lewisville | AR | USA |
| 5561 | Windstream Kerrville Long Distance, LP | Matthews | NC | USA |
| 5564 | Windstream Kerrville Long Distance, LP | Matthews | NC | USA |
| 5581 | Windstream Iowa Communications, Inc. | Little Rock | AR | USA |
| 5584 | Wightman Telecom Ltd. | Clifford | ON | CANADA |
| 5595 | Western Long Distance, Inc. | Langley | WA | USA |
| 5596 | Windstream Lexcom Communications, Inc. | Little Rock | AR | USA |
| 5614 | Windstream Iowa Communications, Inc. | Little Rock | AR | USA |
| 5655 | West River Long Distance | Hazen | ND | USA |
| 5670 | World Wide Tele-Trans Company | --- | -- | USA |
| 5671 | Windstream NuVox, Inc. | Little Rock | AR | USA |
| 5700 | WCTA Long Distance Co. | Lake Mills | IA | USA |
| 5704 | Walnut Telephone Co., Inc. | Walnut | IA | USA |
| 5706 | Wabash Mutual Telephone Co. | Celina | OH | USA |
| 5730 | Wabash Independent Networks | Louisville | IL | USA |
| 5875 | WPTI Telecom, LLC | Genoa | NV | USA |
| 5916 | World Window | Richardson | TX | USA |
| 5918 | Wisteria LD Service | Wolf City | TX | USA |
| 5938 | Weymouth Service | South Weymouth | MA | USA |
| 5946 | Wabash Independent Networks | Louisville | IL | USA |
| 5947 | Wilson Communication Company, Inc. | Wilson | KS | USA |
| 5948 | Wilson Communication Company, Inc. | Wilson | KS | USA |
| 5952 | Wilkes Communications, Inc. dba Wilkes L.D. Service | Washington | GA | USA |
| 5971 | Windstream Southwest Long Distance, L.P. | Matthews | NC | USA |
| 5976 | Windstream Concord Telephone, Inc. | Matthews | NC | USA |
| 5989 | Wightman Telecom Ltd. | Clifford | ON | CANADA |
| 5992 | WorldXChange Corp. | San Diego | CA | USA |
| 6019 | Wheat State Telephone, Inc. | Udall | KS | USA |
| 6030 | Western Long Distance, Inc. | Langley | WA | USA |
| 6035 | West Kentucky Networks, Inc. | Mayfield | KY | USA |
| 6105 | WCTA Long Distance Co. | Lake Mills | IA | USA |
| 6121 | Windstream NuVox, Inc. | Little Rock | AR | USA |
| 6125 | Wantel, Inc. | Roseburg | OR | USA |
| 6180 | Windstream NuVox, Inc. | Little Rock | AR | USA |
| 6204 | Wiregrass Telcom, Inc. | Ashford | AL | USA |
| 6246 | West Carolina Communications, LLC | Abbeville | SC | USA |
| 6271 | Wiki Wiki Telecom | Washougal | WA | USA |
| 6311 | Windstream EN-TEL, LLC | Little Rock | AR | USA |
| 6322 | WorldNet, L.L.C. | Lawrence | KS | USA |
| 6342 | Westelcom Network, Inc. | Plattsburgh | NY | USA |
| 6348 | Westelcom Network, Inc. | Plattsburgh | NY | USA |
| 6397 | Worldnet Communications, Inc. dba TMS | East Syracuse | NY | USA |
| 6454 | Wittenberg Cable TV Company, Inc. | Wittenberg | WI | USA |
| 6486 | Winn Telephone Co. dba Winn Telecom | Mt. Pleasant | MI | USA |
| 6487 | Winn Telephone Co. dba Winn Telecom | Mt. Pleasant | MI | USA |
| 6551 | Wilkes Communications, Inc. | Wilkesboro | NC | USA |
| 6552 | Wilkes Communications, Inc. | Wilkesboro | NC | USA |
| 6574 | Windstream Montezuma, Inc. | Little Rock | AR | USA |
| 6672 | Windstream NuVox, Inc. | Little Rock | AR | USA |
| 6678 | Wilsave, Inc. | Chicago | IL | USA |
| 6788 | Worldcall Communications International, Inc. | Yonkers | NY | USA |
| 6789 | WorldXChange Corp. | San Diego | CA | USA |
| 6911 | WTC Communications, Inc. | Wamego | KS | USA |
| 6981 | Warwick Valley Telephone Co. | Warwick | NY | USA |
| 8671 | Washington County Rural Telephone | Pekin | IN | USA |
| 9240 | World Communications, Inc. | Seattle | WA | USA |
| 9280 | Wahkiakum West Long Distance, Inc. | Rosburg | WA | USA |
| 9282 | West Central Telephone Association | Sebeca | MN | USA |