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| M5 NETWORKS, LLC |
| Magna5 LLC |
| Marconi Wireless Holdings, LLC |
| Margeaux Telecom |
| Matrix Business Technologies |
| Maxsip Telecom |
| MAXSIP TEL LLC |
| McGraw Communications, Inc. |
| MCI Communications Services LLC |
| MCImetro Access Transmission Services LLC |
| McLeodUSA Telecommunication Services, Inc. |
| Mereo 89, LLC |
| Metro Fibernet, LLC |
| MetroPCS |
| MetroPCS MICHIGAN, L.L.C. |
| Metropolitan Telecommunications d/b/a MetTel |
| Metropolitan Telecommunications of North Dakota, Inc. |
| Midco |
| Midcontinent Communications |
| Mid-Rivers Communications |
| Mid-Rivers Communications |
| Mid-Rivers Telephone Cooperative, Inc. |
| Midwest Networks Development LLC |
| Minnesota Independent Equal Access Corporation |
| Mint Mobile, LLC |
| Miracle Communications Inc. |
| Mitel Cloud Services, Inc. |
| MLGC |
| MLGC, LLC |
| Mobile ESPN, LLC |
| Mobilitie, LLC |
| Momentum Telecom Inc. |
| Moorheadcity.com |
| Moxee |
| Moxee Technologies LLC |
| MVNO Connect LLC |