Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Denver, CO

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
720-767 A DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-767 0   078F BANDWIDTH.COM CLEC, LLC - CO 656   2014-09-16   
720-767 1   078F BANDWIDTH.COM CLEC, LLC - CO 656   2014-09-16   
720-767 2   078F BANDWIDTH.COM CLEC, LLC - CO 656   2014-09-16   
720-767 3   078F BANDWIDTH.COM CLEC, LLC - CO 656   2014-09-16   
720-767 4   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2014-09-16   
720-767 5   5562 METROPCS, INC. 656   2014-09-18   
720-767 6   5562 METROPCS, INC. 656   2014-09-16   
720-767 7   6529 T-MOBILE USA, INC. 656   2014-09-13   
720-767 8   6529 T-MOBILE USA, INC. 656   2014-09-13   
720-767 9   6529 T-MOBILE USA, INC. 656   2014-09-13   
720-768 A DNVRCO26XJX  022H COMMIO, LLC 656      
720-768 0   624H ONVOY SPECTRUM, LLC 656   2023-08-01   
720-768 1   624H ONVOY SPECTRUM, LLC 656   2023-08-01   
720-768 2   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2018-03-14   
720-768 3   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2018-03-14   
720-768 4   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2018-03-14   
720-768 5   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2018-03-14   
720-768 6   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2018-03-14   
720-768 7   022H COMMIO, LLC 656   2018-01-05   
720-768 8   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2018-03-14   
720-768 9   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2018-03-14   
720-769 A DNVRCO26DMD  197D VONAGE AMERICA LLC 656      
720-769 0   197D VONAGE AMERICA LLC 656   2021-08-12   
720-769 1   318J COMCAST IP PHONE, LLC 656   2020-11-02   
720-769 2   318J COMCAST IP PHONE, LLC 656   2020-11-02   
720-769 3   318J COMCAST IP PHONE, LLC 656   2020-11-02   
720-769 4   318J COMCAST IP PHONE, LLC 656   2020-11-02   
720-769 5   318J COMCAST IP PHONE, LLC 656   2020-11-02   
720-769 6   318J COMCAST IP PHONE, LLC 656   2020-11-02   
720-769 7   197D VONAGE AMERICA LLC 656   2020-11-01   
720-769 8   318J COMCAST IP PHONE, LLC 656   2020-11-02   
720-769 9   197D VONAGE AMERICA LLC 656   2021-08-12   
720-771 A DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-772 A DNVRCOETPS0  3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
720-772 0   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2015-02-09   
720-772 1   078F BANDWIDTH.COM CLEC, LLC - CO 656   2015-03-23   
720-772 2   829J PAETEC ITEL, LLC 656   2015-02-20   
720-772 3   3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656   2015-02-21   
720-772 4   3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656   2014-12-06   
720-772 5   3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656   2015-01-08   
720-772 6   078F BANDWIDTH.COM CLEC, LLC - CO 656   2015-03-23   
720-772 7   078F BANDWIDTH.COM CLEC, LLC - CO 656   2015-03-23   
720-772 8   078F BANDWIDTH.COM CLEC, LLC - CO 656   2015-03-23   
720-772 9   078F BANDWIDTH.COM CLEC, LLC - CO 656   2015-03-23   
720-773 A DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
720-773 0   078F BANDWIDTH.COM CLEC, LLC - CO 656   2015-03-27   
720-773 1   078F BANDWIDTH.COM CLEC, LLC - CO 656   2015-03-27   
720-773 2   078F BANDWIDTH.COM CLEC, LLC - CO 656   2015-03-27   
720-773 3   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656   2015-03-26   
720-773 4   078F BANDWIDTH.COM CLEC, LLC - CO 656   2015-03-27   
720-773 5   078F BANDWIDTH.COM CLEC, LLC - CO 656   2015-03-27   
720-773 6   026D ONVOY, LLC - CO 656   2015-03-27   
720-773 7   078F BANDWIDTH.COM CLEC, LLC - CO 656   2015-03-27   
720-773 8   078F BANDWIDTH.COM CLEC, LLC - CO 656   2015-03-27   
720-773 9   078F BANDWIDTH.COM CLEC, LLC - CO 656   2015-03-27   
720-774 A DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
720-774 0   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2015-07-20   
720-774 1   6010 NEW CINGULAR WIRELESS PCS, LLC 656   2015-07-19   
720-774 2   6010 NEW CINGULAR WIRELESS PCS, LLC 656   2015-07-19   
720-774 3   6010 NEW CINGULAR WIRELESS PCS, LLC 656   2015-07-19   
720-774 4   6010 NEW CINGULAR WIRELESS PCS, LLC 656   2015-07-19   
720-774 5   6010 NEW CINGULAR WIRELESS PCS, LLC 656   2015-07-19   
720-774 6   026D ONVOY, LLC - CO 656   2016-05-05   
720-774 7   6010 NEW CINGULAR WIRELESS PCS, LLC 656   2015-07-19   
720-774 8   6010 NEW CINGULAR WIRELESS PCS, LLC 656   2015-07-19   
720-774 9   6010 NEW CINGULAR WIRELESS PCS, LLC 656   2015-07-19   
720-775 A DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
720-775 0   6010 NEW CINGULAR WIRELESS PCS, LLC 656   2009-12-11   
720-775 1   6010 NEW CINGULAR WIRELESS PCS, LLC 656   2009-12-11   
720-775 2   6010 NEW CINGULAR WIRELESS PCS, LLC 656   2009-12-11   
720-775 3   6010 NEW CINGULAR WIRELESS PCS, LLC 656   2009-12-11   
720-775 4   6010 NEW CINGULAR WIRELESS PCS, LLC 656   2009-12-11   
720-775 5   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2010-03-01   
720-775 6   4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656   2010-04-19   
720-775 7   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2010-03-01   
720-775 8   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2010-03-01   
720-775 9   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2010-03-01   
720-777 A AURRCOMADS0  9636 QWEST CORPORATION 656      
720-777 0   9636 QWEST CORPORATION 656   2006-04-02   
720-777 1   9636 QWEST CORPORATION 656   2006-04-02   
720-777 2   9636 QWEST CORPORATION 656   2006-04-02   
720-777 3   9636 QWEST CORPORATION 656   2006-04-02   
720-777 4   9636 QWEST CORPORATION 656   2006-04-02   
720-777 5   9636 QWEST CORPORATION 656   2006-04-02   
720-777 6   9636 QWEST CORPORATION 656   2006-04-02   
720-777 7   9636 QWEST CORPORATION 656   2006-04-02   
720-777 8   9636 QWEST CORPORATION 656   2006-04-02   
720-777 9   9636 QWEST CORPORATION 656   2006-04-02   
720-778 A DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656      
720-778 0   078F BANDWIDTH.COM CLEC, LLC - CO 656   2014-11-24   
720-778 1   078F BANDWIDTH.COM CLEC, LLC - CO 656   2014-11-24   
720-778 2   026D ONVOY, LLC - CO 656   2014-12-02   
720-778 3   026D ONVOY, LLC - CO 656   2014-12-02   
720-778 4   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2015-04-24   
720-778 5   508J CENTURYLINK COMMUNICATIONS, LLC 656   2015-07-01   
720-778 6   6010 NEW CINGULAR WIRELESS PCS, LLC 656   2014-11-25   
720-778 7   6010 NEW CINGULAR WIRELESS PCS, LLC 656   2014-11-25   
720-778 8   026D ONVOY, LLC - CO 656   2015-08-03   
720-778 9   026D ONVOY, LLC - CO 656   2015-08-03   

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 >>

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.