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
720-665 6   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2017-10-14   
720-665 7   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2017-10-14   
720-665 8   5562 METROPCS, INC. 656   2017-10-15   
720-665 9   078F BANDWIDTH.COM CLEC, LLC - CO 656   2017-10-15   
720-666 A DNVRCO26DS5  278F PEERLESS NETWORK OF COLORADO, LLC - CO 656      
720-666 0   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2012-07-18   
720-666 1   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2012-07-18   
720-666 2   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2012-07-18   
720-666 3   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2012-07-18   
720-666 4   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2012-07-18   
720-666 5   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2012-07-18   
720-666 6   278F PEERLESS NETWORK OF COLORADO, LLC - CO 656   2012-07-14   
720-666 7   6529 T-MOBILE USA, INC. 656   2012-07-27   
720-666 8   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2012-10-30   
720-666 9   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2012-10-30   
720-667 A DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656      
720-667 0   551G NUSO, LLC 656   2018-03-06   
720-667 1   318J COMCAST IP PHONE, LLC 656   2018-01-12   
720-667 2   318J COMCAST IP PHONE, LLC 656   2018-01-12   
720-667 3   318J COMCAST IP PHONE, LLC 656   2018-01-12   
720-667 4   318J COMCAST IP PHONE, LLC 656   2018-01-12   
720-667 5   7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656   2018-01-13   
720-667 6   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2018-03-12   
720-667 7   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2018-03-12   
720-667 8   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2018-03-12   
720-667 9   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2018-03-12   
720-668 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-668 0   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2014-11-30   
720-668 1   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2014-11-30   
720-668 2   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2014-11-30   
720-668 3   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2014-11-30   
720-668 4   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2014-11-30   
720-668 5   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2015-08-10   
720-668 6   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2015-08-10   
720-668 7   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2015-08-10   
720-668 8   318J COMCAST IP PHONE, LLC 656   2015-08-10   
720-668 9   318J COMCAST IP PHONE, LLC 656   2015-08-10   
720-670 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-670 0   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-670 1   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2021-06-11   
720-670 2   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2021-06-11   
720-670 3   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2021-06-11   
720-670 4   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2021-07-11   
720-670 5   5562 METROPCS, INC. 656   2020-07-09   
720-670 6   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2005-10-24   
720-670 7   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2007-02-15   
720-670 8   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2005-10-24   
720-670 9   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2006-12-22   
720-671 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-671 0   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2019-06-09   
720-671 1   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2019-06-09   
720-671 2   6529 T-MOBILE USA, INC. 656   2020-02-05   
720-671 3   6529 T-MOBILE USA, INC. 656   2020-02-05   
720-671 4   6529 T-MOBILE USA, INC. 656   2020-02-05   
720-671 5   6529 T-MOBILE USA, INC. 656   2020-02-05   
720-671 6   6529 T-MOBILE USA, INC. 656   2020-02-05   
720-671 7   5562 METROPCS, INC. 656   2020-02-05   
720-671 8   6529 T-MOBILE USA, INC. 656   2020-02-05   
720-671 9   6529 T-MOBILE USA, INC. 656   2020-02-05   
720-672 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-672 0   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2019-11-14   
720-672 1   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2019-11-14   
720-672 2   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2019-11-14   
720-672 3   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2019-11-14   
720-672 4   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2019-11-14   
720-672 5   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2019-11-14   
720-672 6   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2019-11-14   
720-672 7   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2019-11-14   
720-672 8   5562 METROPCS, INC. 656   2020-07-09   
720-672 9   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2020-07-11   
720-673 A DNVTCOZIBMD  114J EXIANT COMMUNICATIONS LLC 656      
720-673 0   073H TELNYX LLC 656   2019-10-25   
720-673 1   114J EXIANT COMMUNICATIONS LLC 656   2019-10-21   
720-673 2   6529 T-MOBILE USA, INC. 656   2019-12-14   
720-673 3   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2019-10-22   
720-673 4   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2019-10-22   
720-673 5   6529 T-MOBILE USA, INC. 656   2019-12-14   
720-673 6   6529 T-MOBILE USA, INC. 656   2019-12-14   
720-673 7   6529 T-MOBILE USA, INC. 656   2019-12-14   
720-673 8   078F BANDWIDTH.COM CLEC, LLC - CO 656   2019-10-24   
720-673 9   078F BANDWIDTH.COM CLEC, LLC - CO 656   2019-10-24   
720-674 A DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656      
720-674 0   026D ONVOY, LLC - CO 656   2020-04-09   
720-674 1   026D ONVOY, LLC - CO 656   2020-04-09   
720-674 2   318J COMCAST IP PHONE, LLC 656   2020-04-05   
720-674 3   318J COMCAST IP PHONE, LLC 656   2020-04-05   
720-674 4   318J COMCAST IP PHONE, LLC 656   2020-04-05   
720-674 5   318J COMCAST IP PHONE, LLC 656   2020-04-05   
720-674 6   026D ONVOY, LLC - CO 656   2020-04-09   
720-674 7   026D ONVOY, LLC - CO 656   2020-04-09   
720-674 8   026D ONVOY, LLC - CO 656   2020-04-09   
720-674 9   026D ONVOY, LLC - CO 656   2020-04-09   
720-675 A DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
720-675 0   6010 NEW CINGULAR WIRELESS PCS, LLC 656   2009-07-12   
720-675 1   6010 NEW CINGULAR WIRELESS PCS, LLC 656   2009-07-27   
720-675 2   6010 NEW CINGULAR WIRELESS PCS, LLC 656   2009-07-27   
720-675 3   6010 NEW CINGULAR WIRELESS PCS, LLC 656   2009-07-27   
720-675 4   6010 NEW CINGULAR WIRELESS PCS, LLC 656   2009-07-27   
720-675 5   6010 NEW CINGULAR WIRELESS PCS, LLC 656   2009-07-27   
720-675 6   6010 NEW CINGULAR WIRELESS PCS, LLC 656   2009-07-27   

<< 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: LES.NET

Like this site? We accept donations via PayPal.