Area code 603
5,633 number blocks indexed across 52 carriers.
States: NH (5,633)
Carriers
| OCN | Company | HQ | Type | Blocks | Recent | Website |
|---|---|---|---|---|---|---|
| 6386 | Bell Atlantic NYNEX Mobile | Bedminster, NJ | Wireless Carrier | 918 | 44 | verizon.com |
| 6889 | Omnipoint Miami E License LLC | Bellevue, WA | Personal Communications Service (Wireless) | 477 | 32 | t-mobile.com |
| 145J | Terra Nova Telecom Inc | Lakewood Ranch, FL | IP-Enabled Service / VoIP | 28 | 27 | terranova.net |
| 4036 | New Cingular Wireless PCS LLC - DC | Atlanta, GA | Wireless Carrier | 373 | 11 | att.com |
| 637E | Onvoy LLC - NH | Chicago, IL | Competitive Local Exchange Carrier | 219 | 7 | sinch.com |
| 5562 | T-Mobile USA Inc | Dallas, TX | Personal Communications Service (Wireless) | 121 | 7 | metropcs.com |
| 318J | Comcast IP Phone LLC | Philadelphia, PA | IP-Enabled Service / VoIP | 324 | 6 | comcast.com |
| 8299 | Teleport Communications America LLC - NH | Staten Island, NY | Competitive Local Exchange Carrier | 92 | 1 | att.com |
| 793K | TWC IP Enabled Services LLC | Saint Louis, MO | IP-Enabled Service / VoIP | 62 | 1 | |
| 732J | NUSO LLC | University City, MO | IP-Enabled Service / VoIP | 5 | 1 | brightlink.com |
| 7229 | MCImetro Access Transmission Services LLC | Vienna, VA | Competitive Local Exchange Carrier | 3 | 1 | verizon.com |
| 616J | Leap Telecom LLC | Denver, CO | IP-Enabled Service / VoIP | 2 | 1 | leap.tel |
| 5113 | Consolidated Communications of Northern New England LLC - NH | Portland, ME | Regional Bell Operating Company | 1,061 | — | consolidated.com |
| 829J | PAETEC iTel LLC | Charlotte, NC | IP-Enabled Service / VoIP | 471 | — | |
| 6290 | United States Cellular - NH | Chicago, IL | Wireless Carrier | 302 | — | uscellular.com |
| 4017 | Level 3 Communications LLC - NH | Westminster, CO | Competitive Local Exchange Carrier | 236 | — | centurylink.com |
| 8468 | Freedom Ring Communications LLC | Farmington, NH | Competitive Local Exchange Carrier | 214 | — | bayring.com |
| 7778 | MCImetro Access Transmission Services LLC - NH | Vienna, VA | Competitive Local Exchange Carrier | 136 | — | verizon.com |
| 073H | Telnyx LLC | Chicago, IL | IP-Enabled Service / VoIP | 88 | — | telnyx.com |
| 9827 | Otel Telekom Inc - NH | Manchester, NH | Competitive Local Exchange Carrier | 83 | — | otel.com |
| 927H | Peerless Network of New Hampshire LLC - NH | Chicago, IL | Competitive Local Exchange Carrier | 45 | — | peerlessnetwork.com |
| 314C | IDT America Corporation - NH | Newark, NJ | Underlying Local Exchange Carrier | 41 | — | idt.net |
| 996E | Bandwidth.com CLEC LLC - NH | Cary, NC | Competitive Local Exchange Carrier | 39 | — | bandwidth.com |
| 624H | Onvoy Spectrum LLC | Broomfield, CO | Wireless Carrier | 37 | — | |
| 3320 | Merrimack County Telephone Company dba Contoocook Valley Telephone Company | Contoocook, NH | Incumbent Local Exchange Carrier | 26 | — | tdstelecom.com |
| 939H | Commio LLC | Austin, TX | IP-Enabled Service / VoIP | 26 | — | commio.com |
| 0045 | Kearsarge Telephone Company | Madison, WI | Incumbent Local Exchange Carrier | 25 | — | tdstelecom.com |
| 0047 | Merrimack County Telephone Company | Contoocook, NH | Incumbent Local Exchange Carrier | 22 | — | tdstelecom.com |
| 0049 | Union Telephone Company - NH | Farmington, NH | Incumbent Local Exchange Carrier | 19 | — | unionwireless.com |
| 3316 | Consolidated Communications of Maine Company | Standish, ME | Incumbent Local Exchange Carrier | 19 | — | consolidated.com |
| 197D | Vonage America LLC | Holmdel, NJ | IP-Enabled Service / VoIP | 14 | — | vonage.com |
| MULT | Multiple OCN Listing | Administrative / Reserved | 14 | — | ||
| 490J | Boost SubscriberCo LLC | Washington, DC | Wireless Carrier | 12 | — | dish.com |
| 7421 | AT&T Local | Bedminster, NJ | Competitive Local Exchange Carrier | 12 | — | att.com |
| 965H | Fractel LLC | Indialantic, FL | IP-Enabled Service / VoIP | 12 | — | fractel.net |
| 0050 | Wilton Telephone Company | Wilton, NH | Incumbent Local Exchange Carrier | 8 | — | tdstelecom.com |
| 792K | Charter IP Enabled Services LLC | Saint Louis, MO | IP-Enabled Service / VoIP | 8 | — | |
| 3321 | Hollis Telephone Company Inc | Wilton, NH | Incumbent Local Exchange Carrier | 7 | — | tdstelecom.com |
| 0039 | Granite State Telephone Inc | Weare, NH | Incumbent Local Exchange Carrier | 4 | — | gstnetworks.com |
| 383J | Consolidated Communications Enterprise Services Inc | Washington, PA | IP-Enabled Service / VoIP | 4 | — | consolidated.com |
| 508J | CenturyLink Communications LLC | Littleton, CO | IP-Enabled Service / VoIP | 4 | — | centurylink.com |
| 478J | NUSO LLC | Atlanta, GA | IP-Enabled Service / VoIP | 3 | — | brightlink.com |
| 321J | HD Carrier LLC | Henderson, NV | IP-Enabled Service / VoIP | 2 | — | hdcarrier.com |
| 425J | CSC Wireless LLC | Long Island City, NY | Wireless Carrier | 2 | — | alticeusa.com |
| 516J | Ton80 Communications LLC | Anderson, SC | IP-Enabled Service / VoIP | 2 | — | coretel.net |
| 573F | Topsham Communications LLC | East Corinth, VT | Competitive Local Exchange Carrier | 2 | — | tops-tele.com |
| 631H | Enhanced Communications of Northern New England Inc - NH | Manchester, NH | Competitive Local Exchange Carrier | 2 | — | consolidated.com |
| 853H | TDS Metrocom LLC - NH | Madison, WI | Competitive Local Exchange Carrier | 2 | — | tdstelecom.com |
| 9748 | American Messaging Services LLC | Lewisville, TX | Wireless Carrier | 2 | — | americanmessaging.net |
| 0038 | Bretton Woods Telephone Company | Bretton Woods, NH | Incumbent Local Exchange Carrier | 1 | — | worldsurfer.net |
| 0043 | Dunbarton Telephone Company Inc | Dunbarton, NH | Incumbent Local Exchange Carrier | 1 | — | dunbartontelephone.com |
| 700J | Wavenation LLC | Chicago, IL | IP-Enabled Service / VoIP | 1 | — | peerlessnetwork.com |