Phone carriers and their number blocks
The 77 companies holding the most phone prefixes in the U.S. and territories. A number's original carrier hints at what kind of line it is.
| Carrier | Type | Prefixes |
|---|---|---|
| AT&T (local phone) | Local phone company | 25,435 |
| AT&T Mobility | Mobile carrier | 18,727 |
| Verizon Wireless | Mobile carrier | 17,658 |
| T-Mobile (including Sprint) | Mobile carrier | 16,177 |
| Onvoy | Internet / business phone carrier | 14,830 |
| Verizon (local phone) | Local phone company | 10,416 |
| Level 3 (Lumen) | Internet / business phone carrier | 10,346 |
| CenturyLink / Lumen | Local phone company | 8,071 |
| Frontier | Local phone company | 5,852 |
| MCImetro (Verizon Business) | Internet / business phone carrier | 5,673 |
| Windstream (PAETEC) | Internet / business phone carrier | 5,552 |
| Bandwidth | Internet / business phone carrier | 4,805 |
| MetroPCS (T-Mobile) | Mobile carrier | 4,383 |
| Teleport Communications America | Internet / business phone carrier | 3,852 |
| Fractel | Internet / business phone carrier | 2,858 |
| Comcast | Internet / business phone carrier | 2,070 |
| Spok | Paging service | 1,941 |
| Charter / Spectrum | Internet / business phone carrier | 1,691 |
| TON80 Communications | Internet / business phone carrier | 1,582 |
| UScellular | Mobile carrier | 1,152 |
| Commio | Internet / business phone carrier | 819 |
| Tpx Communications | Internet / business phone carrier | 809 |
| American Messaging Services | Paging service | 795 |
| Nuso | Internet / business phone carrier | 739 |
| AT&T Enterprises | Phone company | 670 |
| IP Horizon | Internet / business phone carrier | 616 |
| Telnyx | Internet / business phone carrier | 600 |
| Tc Systems | Phone company | 547 |
| Ziply Fiber | Local phone company | 517 |
| Boost / Virgin Mobile | Mobile carrier | 482 |
| Allstream | Internet / business phone carrier | 450 |
| Windstream Comm Sw | Local phone company | 449 |
| Csc Voice | Internet / business phone carrier | 414 |
| Brightspeed Of Eastern North Carolina | Local phone company | 384 |
| Core Communications | Internet / business phone carrier | 379 |
| Vonage America | Internet / business phone carrier | 355 |
| Hd Carrier | Internet / business phone carrier | 330 |
| Cincinnati Bell | Local phone company | 312 |
| Terra Nova Telecom | Internet / business phone carrier | 305 |
| Hawaiian Telcom | Local phone company | 304 |
| Liberty Mobile Puerto Rico | Mobile carrier | 300 |
| Interactive Services Network | Internet / business phone carrier | 280 |
| Brightspeed Of Northwest Ohio | Local phone company | 276 |
| Cablevision Lightpath | Internet / business phone carrier | 269 |
| Twilio | Internet / business phone carrier | 262 |
| Consolidated Comm Of No. New England-me | Local phone company | 258 |
| Consolidated Comm Of No. New England-nh | Local phone company | 246 |
| Puerto Rico Tel | Local phone company | 244 |
| Skyetel | Internet / business phone carrier | 222 |
| Mcc Telephony | Internet / business phone carrier | 214 |
| Stpcs Joint Venture | Mobile carrier | 205 |
| Csc Wireless | Mobile carrier | 204 |
| Matrix Telecom, Llc. S/i/i Tnci | Internet / business phone carrier | 201 |
| Peerless Network Of California | Internet / business phone carrier | 197 |
| Windstream Nebraska | Local phone company | 192 |
| Windstream Kentucky East, Inc. - Lexington | Local phone company | 192 |
| Wide Voice | Phone company | 189 |
| Wavenation | Phone company | 186 |
| Brightspeed Of Missouri | Local phone company | 176 |
| Claro Puerto Rico | Local phone company | 173 |
| Exiant Communications | Phone company | 172 |
| Windstream Georgia Communications | Local phone company | 166 |
| Bell Atlantic Mobile | Mobile carrier | 165 |
| Grande Communications Networks | Phone company | 164 |
| Utility Telecom Group | Phone company | 162 |
| Telepak Networks | Phone company | 161 |
| Stratus Networks | Phone company | 161 |
| Consolidated Communications Of Vermont | Local phone company | 153 |
| Windstream Iowa Communications, Inc. - North | Local phone company | 148 |
| General Communication | Phone company | 147 |
| Windstream Iowa Communications | Local phone company | 143 |
| Peerless Network Of Texas | Internet / business phone carrier | 142 |
| Windstream Pennsylvania | Local phone company | 137 |
| Brightspeed Of Pennsylvania | Local phone company | 136 |
| Brightspeed Of Virginia | Local phone company | 129 |
| Southern Communications Services | Phone company | 128 |
| Airus | Phone company | 123 |