Area code 406
4,768 number blocks indexed across 67 carriers.
States: MT (4,768)
Carriers
| OCN | Company | HQ | Type | Blocks | Recent | Website |
|---|---|---|---|---|---|---|
| 145J | Terra Nova Telecom Inc | Lakewood Ranch, FL | IP-Enabled Service / VoIP | 53 | 51 | terranova.net |
| 6010 | New Cingular Wireless PCS LLC | Kirkland, WA | Wireless Carrier | 420 | 39 | att.com |
| 6564 | Cellco Partnership dba Verizon Wireless - MT | Olathe, KS | Wireless Carrier | 788 | 30 | verizonwireless.com |
| 624H | Onvoy Spectrum LLC | Broomfield, CO | Wireless Carrier | 101 | 29 | |
| 6529 | T-Mobile USA Inc | Bellevue, WA | Personal Communications Service (Wireless) | 167 | 20 | t-mobile.com |
| 509K | LiveWire Telecom LLC | Longwood, FL | Competitive Local Exchange Carrier | 17 | 17 | |
| 520K | TDS Metrocom LLC | Madison, WI | IP-Enabled Service / VoIP | 7 | 6 | |
| 792K | Charter IP Enabled Services LLC | Saint Louis, MO | IP-Enabled Service / VoIP | 146 | 5 | |
| 453F | Onvoy LLC - MT | Chicago, IL | Competitive Local Exchange Carrier | 905 | 4 | sinch.com |
| 9415 | Level 3 Communications LLC - MT | Broomfield, CO | Competitive Local Exchange Carrier | 213 | 3 | centurylink.com |
| 994E | Bandwidth.com CLEC LLC - MT | Cary, NC | Competitive Local Exchange Carrier | 174 | 3 | bandwidth.com |
| 073H | Telnyx LLC | Chicago, IL | IP-Enabled Service / VoIP | 99 | 3 | telnyx.com |
| 321J | HD Carrier LLC | Henderson, NV | IP-Enabled Service / VoIP | 14 | 3 | hdcarrier.com |
| 732J | NUSO LLC | University City, MO | IP-Enabled Service / VoIP | 11 | 3 | brightlink.com |
| 700J | Wavenation LLC | Chicago, IL | IP-Enabled Service / VoIP | 4 | 2 | peerlessnetwork.com |
| 743G | Wide Voice LLC - MT | Las Vegas, NV | Competitive Local Exchange Carrier | 4 | 2 | |
| 9636 | Qwest Corporation | Minneapolis, MN | Regional Bell Operating Company | 539 | 1 | centurylink.com |
| 7229 | MCImetro Access Transmission Services LLC | Vienna, VA | Competitive Local Exchange Carrier | 37 | 1 | verizon.com |
| 588H | Airus Inc - MT | Chicago, IL | Competitive Local Exchange Carrier | 28 | 1 | airustel.com |
| 2255 | 3 Rivers Telephone Cooperative Inc | Fairfield, MT | Incumbent Local Exchange Carrier | 96 | — | 3rivers.coop |
| 2257 | Triangle Telephone Cooperative Association Inc | Havre, MT | Incumbent Local Exchange Carrier | 92 | — | itstriangle.com |
| 2247 | Nemont Telephone Cooperative Inc - MT | Scobey, MT | Incumbent Local Exchange Carrier | 82 | — | nemont.com |
| 2246 | Mid-Rivers Telephone Cooperative Inc | Circle, MT | Incumbent Local Exchange Carrier | 72 | — | midrivers.com |
| 508J | CenturyLink Communications LLC | Littleton, CO | IP-Enabled Service / VoIP | 67 | — | centurylink.com |
| 2235 | Blackfoot Telephone Cooperative Inc | Missoula, MT | Incumbent Local Exchange Carrier | 62 | — | blackfoot.com |
| 2249 | CenturyTel of Montana Inc dba CenturyLink | Monroe, LA | Incumbent Local Exchange Carrier | 60 | — | centurylink.com |
| 2250 | Project Telephone Company Inc | Scobey, MT | Incumbent Local Exchange Carrier | 42 | — | pmt.org |
| 3310 | Triangle Telephone Cooperative Association Inc | Havre, MT | Incumbent Local Exchange Carrier | 42 | — | itstriangle.com |
| 443B | Sagebrush Cellular Inc | Scobey, MT | Wireless Carrier | 40 | — | nemontel.net |
| 771G | Teleport Communications America - MT - LLC | Bedminster, NJ | Competitive Local Exchange Carrier | 36 | — | att.com |
| 3924 | 3 Rivers Telephone Cooperative Inc - MT | Fairfield, MT | Competitive Local Exchange Carrier | 34 | — | 3rivers.coop |
| 2251 | Range Telephone Cooperative Inc - MT | Forsyth, MT | Incumbent Local Exchange Carrier | 31 | — | rangetel.coop |
| 4222 | Electric Lightwave LLC dba Allstream | Spokane, WA | Competitive Local Exchange Carrier | 28 | — | allstream.com |
| 7830 | Mid-Rivers Telephone Cooperative Inc | Circle, MT | Competitive Local Exchange Carrier | 27 | — | midrivers.com |
| 939H | Commio LLC | Austin, TX | IP-Enabled Service / VoIP | 22 | — | commio.com |
| 4322 | Ziply Fiber Montana LLC dba Ziply Fiber | Rochester, NY | Incumbent Local Exchange Carrier | 21 | — | ziply.com |
| 986F | Western Montana CommunityTel Inc - MT | Ronan, MT | Competitive Local Exchange Carrier | 19 | — | |
| 5562 | T-Mobile USA Inc | Dallas, TX | Personal Communications Service (Wireless) | 14 | — | metropcs.com |
| 7870 | Blackfoot Communications Inc - MT | Missoula, MT | Competitive Local Exchange Carrier | 14 | — | blackfoot.com |
| MULT | Multiple OCN Listing | Administrative / Reserved | 14 | — | ||
| 619J | Siyeh Communications | Browning, MT | Incumbent Local Exchange Carrier | 12 | — | siycom.com |
| 8140 | Range Telephone Cooperative Inc - MT | Forsyth, MT | Competitive Local Exchange Carrier | 11 | — | rangetel.coop |
| 490J | Boost SubscriberCo LLC | Washington, DC | Wireless Carrier | 10 | — | dish.com |
| 2296 | Tri-County Telephone Association Inc | Basin, WY | Incumbent Local Exchange Carrier | 9 | — | tct.net |
| 935G | Tri Tel Inc - MT | Basin, WY | Competitive Local Exchange Carrier | 9 | — | tct.net |
| 746D | Montana Opticom LLC - MT | Big Sky, MT | Competitive Local Exchange Carrier | 7 | — | mt-opticom.com |
| 2248 | Northern Telephone Cooperative Inc | Sunburst, MT | Incumbent Local Exchange Carrier | 6 | — | northerntel.org |
| 478J | NUSO LLC | Atlanta, GA | IP-Enabled Service / VoIP | 6 | — | brightlink.com |
| 7421 | AT&T Local | Bedminster, NJ | Competitive Local Exchange Carrier | 6 | — | att.com |
| 197D | Vonage America LLC | Holmdel, NJ | IP-Enabled Service / VoIP | 5 | — | vonage.com |
| 2254 | Southern Montana Telephone Company | Wisdom, MT | Incumbent Local Exchange Carrier | 5 | — | smtel.com |
| 2252 | Ronan Telephone Company | Ronan, MT | Incumbent Local Exchange Carrier | 4 | — | accessmontana.com |
| 318J | Comcast IP Phone LLC | Philadelphia, PA | IP-Enabled Service / VoIP | 4 | — | comcast.com |
| 425J | CSC Wireless LLC | Long Island City, NY | Wireless Carrier | 4 | — | alticeusa.com |
| 506J | Twilio International Inc | San Francisco, CA | IP-Enabled Service / VoIP | 4 | — | twilio.com |
| 515J | IP Horizon LLC | Orlando, FL | IP-Enabled Service / VoIP | 4 | — | |
| 622J | Skye Telecom LLC dba Skyetel | Vancouver, WA | IP-Enabled Service / VoIP | 4 | — | skyetel.com |
| 958H | Triangle Communication System Inc - MT | Havre, MT | Competitive Local Exchange Carrier | 3 | — | itstriangle.com |
| 1632 | Reservation Telephone Cooperative | Parshall, ND | Incumbent Local Exchange Carrier | 2 | — | jsitel.com |
| 2242 | Interbel Telephone Cooperative Inc | Eureka, MT | Incumbent Local Exchange Carrier | 2 | — | interbel.com |
| 2244 | Lincoln Telephone Company Inc | Lincoln, MT | Incumbent Local Exchange Carrier | 2 | — | linctel.net |
| 965H | Fractel LLC | Indialantic, FL | IP-Enabled Service / VoIP | 2 | — | fractel.net |
| 1689 | West River Cooperative Telephone Company | Bison, SD | Incumbent Local Exchange Carrier | 1 | — | sdplains.com |
| 2241 | Hot Springs Telephone Company | Ronan, MT | Incumbent Local Exchange Carrier | 1 | — | hotspringsmt.net |
| 3410 | RT Communications Inc | Worland, WY | Incumbent Local Exchange Carrier | 1 | — | rtcom.net |
| 3959 | Interbel Telephone Cooperative Inc - MT | Eureka, MT | Competitive Local Exchange Carrier | 1 | — | interbel.com |
| 551G | NUSO LLC | Atlanta, GA | Wireless Carrier | 1 | — | 365wireless.net |