Area code 720
7,245 number blocks indexed across 59 carriers.
States: CO (7,245)
Carriers
| OCN | Company | HQ | Type | Blocks | Recent | Website |
|---|---|---|---|---|---|---|
| 6010 | New Cingular Wireless PCS LLC | Kirkland, WA | Wireless Carrier | 704 | 20 | att.com |
| 026D | Onvoy LLC - CO | Chicago, IL | Competitive Local Exchange Carrier | 862 | 18 | sinch.com |
| 6567 | Cellco Partnership dba Verizon Wireless - CO | Olathe, KS | Wireless Carrier | 1,131 | 16 | verizonwireless.com |
| 078F | Bandwidth.com CLEC LLC - CO | Cary, NC | Competitive Local Exchange Carrier | 676 | 2 | bandwidth.com |
| 641H | TDS Broadband Service LLC | Madison, WI | IP-Enabled Service / VoIP | 2 | 2 | |
| 6118 | Level 3 Communications LLC - CO | Westminster, CO | Competitive Local Exchange Carrier | 325 | 1 | centurylink.com |
| 732J | NUSO LLC | University City, MO | IP-Enabled Service / VoIP | 11 | 1 | brightlink.com |
| 145J | Terra Nova Telecom Inc | Lakewood Ranch, FL | IP-Enabled Service / VoIP | 2 | 1 | terranova.net |
| 6529 | T-Mobile USA Inc | Bellevue, WA | Personal Communications Service (Wireless) | 1,298 | — | t-mobile.com |
| 9636 | Qwest Corporation | Minneapolis, MN | Regional Bell Operating Company | 450 | — | centurylink.com |
| 7229 | MCImetro Access Transmission Services LLC | Vienna, VA | Competitive Local Exchange Carrier | 298 | — | verizon.com |
| 318J | Comcast IP Phone LLC | Philadelphia, PA | IP-Enabled Service / VoIP | 294 | — | comcast.com |
| 5562 | T-Mobile USA Inc | Dallas, TX | Personal Communications Service (Wireless) | 275 | — | metropcs.com |
| 7378 | Teleport Communications America LLC - CO | Staten Island, NY | Competitive Local Exchange Carrier | 192 | — | att.com |
| 278F | Peerless Network of Colorado LLC - CO | Chicago, IL | Competitive Local Exchange Carrier | 130 | — | peerlessnetwork.com |
| 3467 | Electric Lightwave LLC dba Allstream | Minneapolis, MN | Competitive Local Exchange Carrier | 89 | — | allstream.com |
| 4574 | Level 3 Telecom of Colorado LLC - CO | Littleton, CO | Competitive Local Exchange Carrier | 68 | — | centurylink.com |
| 829J | PAETEC iTel LLC | Charlotte, NC | IP-Enabled Service / VoIP | 66 | — | |
| 624H | Onvoy Spectrum LLC | Broomfield, CO | Wireless Carrier | 64 | — | |
| 508J | CenturyLink Communications LLC | Littleton, CO | IP-Enabled Service / VoIP | 50 | — | centurylink.com |
| 073H | Telnyx LLC | Chicago, IL | IP-Enabled Service / VoIP | 42 | — | telnyx.com |
| 321J | HD Carrier LLC | Henderson, NV | IP-Enabled Service / VoIP | 34 | — | hdcarrier.com |
| 7421 | AT&T Local | Bedminster, NJ | Competitive Local Exchange Carrier | 23 | — | att.com |
| 197D | Vonage America LLC | Holmdel, NJ | IP-Enabled Service / VoIP | 18 | — | vonage.com |
| 939H | Commio LLC | Austin, TX | IP-Enabled Service / VoIP | 18 | — | commio.com |
| 809C | Intrado Communications LLC | Bedminster, NJ | Competitive Local Exchange Carrier | 14 | — | att.com |
| MULT | Multiple OCN Listing | Administrative / Reserved | 14 | — | ||
| 616J | Leap Telecom LLC | Denver, CO | IP-Enabled Service / VoIP | 11 | — | leap.tel |
| 8980 | XO Colorado LLC | Reston, VA | Competitive Local Exchange Carrier | 11 | — | verizon.com |
| 490J | Boost SubscriberCo LLC | Washington, DC | Wireless Carrier | 7 | — | dish.com |
| 598J | Five9 InC | San Ramon, CA | IP-Enabled Service / VoIP | 5 | — | five9.com |
| 478J | NUSO LLC | Atlanta, GA | IP-Enabled Service / VoIP | 4 | — | brightlink.com |
| 515J | IP Horizon LLC | Orlando, FL | IP-Enabled Service / VoIP | 4 | — | |
| 567G | Teliax Inc - CO | Denver, CO | Competitive Local Exchange Carrier | 4 | — | teliax.com |
| 5736 | Commnet Wireless LLC | Castle Rock, CO | Wireless Carrier | 4 | — | commnetwireless.com |
| 320E | YMax Communications Corporation - CO | Palm Beach, FL | Competitive Local Exchange Carrier | 3 | — | ymaxcorp.com |
| 551G | NUSO LLC | Atlanta, GA | Wireless Carrier | 3 | — | 365wireless.net |
| 5972 | Interlink Advertising Services Inc dba Forethought.Net - CO | Denver, CO | Competitive Local Exchange Carrier | 3 | — | forthought.net |
| 019J | Airus Inc - CO | Chicago, IL | Competitive Local Exchange Carrier | 2 | — | airustel.com |
| 022H | Commio LLC | Austin, TX | Wireless Carrier | 2 | — | commio.com |
| 114J | Exiant Communications LLC | Eldersburg, MD | IP-Enabled Service / VoIP | 2 | — | exiantcom.com |
| 181J | Advanced Telecom Solutions LLC | Bethesda, MD | IP-Enabled Service / VoIP | 2 | — | turbobridge.com |
| 330B | FastTrack Communications Inc - CO | Durango, CO | Competitive Local Exchange Carrier | 2 | — | fasttrack-communications.com |
| 425J | CSC Wireless LLC | Long Island City, NY | Wireless Carrier | 2 | — | alticeusa.com |
| 436J | Hadlo Technologies LLC | Powell, OH | IP-Enabled Service / VoIP | 2 | — | hadlotechnologies.com |
| 506J | Twilio International Inc | San Francisco, CA | IP-Enabled Service / VoIP | 2 | — | twilio.com |
| 507J | The Voice Application Network LLC | El Segundo, CA | IP-Enabled Service / VoIP | 2 | — | widevoice.com |
| 557H | Wide Voice LLC - CO | Las Vegas, NV | Competitive Local Exchange Carrier | 2 | — | widevoice.com |
| 588A | Zippy Tech Incorporated | Durango, CO | Competitive Access Provider | 2 | — | ziply.com |
| 597F | VOIP Innovations LLC | Pittsburgh, PA | IP-Enabled Service / VoIP | 2 | — | voipstreet.com |
| 839J | EON Telecom Inc | Bellingham, WA | IP-Enabled Service / VoIP | 2 | — | |
| 965H | Fractel LLC | Indialantic, FL | IP-Enabled Service / VoIP | 2 | — | fractel.net |
| 996H | Airespring Inc | Van Nuys, CA | IP-Enabled Service / VoIP | 2 | — | airespring.com |
| 016G | Telstar Communications Inc | Windsor, CO | Wireless Carrier | 1 | — | xfinity.com |
| 156J | RCLEC Inc | Centennial, CO | IP-Enabled Service / VoIP | 1 | — | rclec.com |
| 710A | Allo Communications LLC - NE | Imperial, NE | Competitive Local Exchange Carrier | 1 | — | allophone.net |
| 777H | Pacoptic Networks LLC - CO | Ashburn, VA | Competitive Local Exchange Carrier | 1 | — | pacoptic.net |
| 8540 | Great West Services Ltd - CO | Dallas, TX | Competitive Local Exchange Carrier | 1 | — | |
| 9748 | American Messaging Services LLC | Lewisville, TX | Wireless Carrier | 1 | — | americanmessaging.net |