Area code 231
3,711 number blocks indexed across 52 carriers.
States: MI (3,711)
Carriers
| OCN | Company | HQ | Type | Blocks | Recent | Website |
|---|---|---|---|---|---|---|
| 6003 | Cellco Partnership dba Verizon Wireless - MI | Olathe, KS | Wireless Carrier | 287 | 16 | verizonwireless.com |
| 6534 | New Cingular Wireless PCS LLC - IL | Atlanta, GA | Wireless Carrier | 376 | 9 | att.com |
| 2964 | Omnipoint Communications Midwest Operations LLC | Cedar Knolls, NJ | Personal Communications Service (Wireless) | 291 | 5 | t-mobile.com |
| 991E | Bandwidth.com CLEC LLC - MI | Cary, NC | Competitive Local Exchange Carrier | 160 | 4 | bandwidth.com |
| 933G | Peerless Network of Michigan LLC - MI | Chicago, IL | Competitive Local Exchange Carrier | 95 | 4 | peerlessnetwork.com |
| 145J | Terra Nova Telecom Inc | Lakewood Ranch, FL | IP-Enabled Service / VoIP | 4 | 4 | terranova.net |
| 792K | Charter IP Enabled Services LLC | Saint Louis, MO | IP-Enabled Service / VoIP | 144 | 3 | |
| 490J | Boost SubscriberCo LLC | Washington, DC | Wireless Carrier | 6 | 3 | dish.com |
| 321J | HD Carrier LLC | Henderson, NV | IP-Enabled Service / VoIP | 3 | 1 | hdcarrier.com |
| 506J | Twilio International Inc | San Francisco, CA | IP-Enabled Service / VoIP | 2 | 1 | twilio.com |
| 543C | Onvoy LLC V - MI | Chicago, IL | Competitive Local Exchange Carrier | 744 | · | sinch.com |
| 9323 | Ameritech Michigan | Hoffman Estates, IL | Regional Bell Operating Company | 305 | · | att.com |
| 0695 | Frontier North Inc - MI | Rochester, NY | Incumbent Local Exchange Carrier | 236 | · | frontier.com |
| 6120 | Level 3 Communications LLC - MI | Westminster, CO | Competitive Local Exchange Carrier | 156 | · | centurylink.com |
| 624H | Onvoy Spectrum LLC | Broomfield, CO | Wireless Carrier | 115 | · | |
| 3535 | ACD Telecom Inc - MI | East Lansing, MI | Competitive Local Exchange Carrier | 85 | · | acdtelecom.com |
| 508J | CenturyLink Communications LLC | Littleton, CO | IP-Enabled Service / VoIP | 79 | · | centurylink.com |
| 817J | Interactive Services Network Inc | Madison Heights, MI | IP-Enabled Service / VoIP | 70 | · | |
| 2550 | 123.Net LLC | Grand Rapids, MI | Competitive Local Exchange Carrier | 52 | · | 123.net |
| 770E | Teleport Communications America LLC - MI | Bedminster, NJ | Competitive Local Exchange Carrier | 50 | · | att.com |
| 829J | PAETEC iTel LLC | Charlotte, NC | IP-Enabled Service / VoIP | 50 | · | |
| 516C | AT&T Enterprises LLC | San Antonio, TX | IP-Enabled Service / VoIP | 49 | · | att.com |
| 5562 | T-Mobile USA Inc | Dallas, TX | Personal Communications Service (Wireless) | 43 | · | metropcs.com |
| 0702 | Brightspeed of Michigan LLC | Monroe, LA | Incumbent Local Exchange Carrier | 40 | · | centurylink.com |
| 7157 | MCImetro Access Transmission Services LLC - MI | Vienna, VA | Competitive Local Exchange Carrier | 32 | · | verizon.com |
| 318J | Comcast IP Phone LLC | Philadelphia, PA | IP-Enabled Service / VoIP | 30 | · | comcast.com |
| 516J | Ton80 Communications LLC | Anderson, SC | IP-Enabled Service / VoIP | 20 | · | coretel.net |
| 0704 | Ace Telephone Company of Michigan Inc | Houston, MN | Incumbent Local Exchange Carrier | 19 | · | acentek.net |
| 0705 | Brightspeed of Northern Michigan Inc | Monroe, LA | Incumbent Local Exchange Carrier | 19 | · | centurylink.com |
| 0677 | Island Telephone Company | Madison, WI | Incumbent Local Exchange Carrier | 14 | · | tdstelecom.com |
| 939H | Commio LLC | Austin, TX | IP-Enabled Service / VoIP | 14 | · | commio.com |
| MULT | Multiple OCN Listing | Administrative / Reserved | 13 | · | ||
| 116F | Peninsula Fiber Network LLC - MI | Munising, MI | Competitive Local Exchange Carrier | 12 | · | pfnllc.net |
| 965H | Fractel LLC | Indialantic, FL | IP-Enabled Service / VoIP | 12 | · | fractel.net |
| 6630 | Spok Inc | Plano, TX | Wireless Carrier | 11 | · | spok.com |
| 9748 | American Messaging Services LLC | Lewisville, TX | Wireless Carrier | 11 | · | americanmessaging.net |
| 0683 | Carr Telephone Company | Branch, MI | Incumbent Local Exchange Carrier | 10 | · | site.carrinter.net |
| 9245 | CynergyComm.net Inc - MI | Rochester Hills, MI | Underlying Local Exchange Carrier | 10 | · | cynergycomm.net |
| 0720 | Ace Telephone Company of Michigan Inc | Traverse City, MI | Incumbent Local Exchange Carrier | 9 | · | |
| 691A | DayStarr LLC dba DayStarr Communications - MI | Owosso, MI | Competitive Local Exchange Carrier | 8 | · | daystarr.net |
| 0671 | Brightspeed of Central Michigan Inc | Monroe, LA | Incumbent Local Exchange Carrier | 5 | · | centurylink.com |
| 0703 | Kaleva Telephone Company | Kaleva, MI | Incumbent Local Exchange Carrier | 4 | · | kaltelnet.net |
| 392F | Kaleva Telephone Company - MI | Kaleva, MI | Competitive Local Exchange Carrier | 3 | · | kaltelnet.net |
| 0721 | Pigeon Telephone Company | Pigeon, MI | Incumbent Local Exchange Carrier | 2 | · | avci.net |
| 460K | First Communications LLC | Oakbrook Terrace, IL | IP-Enabled Service / VoIP | 2 | · | |
| 622J | Skye Telecom LLC dba Skyetel | Vancouver, WA | IP-Enabled Service / VoIP | 2 | · | skyetel.com |
| 7421 | AT&T Local | Bedminster, NJ | Competitive Local Exchange Carrier | 2 | · | att.com |
| 197D | Vonage America LLC | Holmdel, NJ | IP-Enabled Service / VoIP | 1 | · | vonage.com |
| 4632 | Interactive Services Network Inc | Troy, MI | Competitive Local Exchange Carrier | 1 | · | telnetww.com |
| 732J | NUSO LLC | University City, MO | IP-Enabled Service / VoIP | 1 | · | brightlink.com |
| 785G | Michigan Central Broadband Company LLC | Carney, MI | Incumbent Local Exchange Carrier | 1 | · | michbbs.com |
| 993L | DayStarr LLC dba DayStarr Communications | Owosso, MI | IP-Enabled Service / VoIP | 1 | · |