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 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
720-587 7 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2007-11-29   
720-587 8 FTCLCOMAAMD  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-587 9 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2007-11-29   
720-588 A FTCLCOMA7MD  551G NUSO, LLC 656      
720-588 0 DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2012-12-20   
720-588 1 FTCLCOMA7MD  551G NUSO, LLC 656   2012-12-19   
720-588 2 DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2012-12-20   
720-588 3 DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2012-12-20   
720-588 4 DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2012-12-20   
720-588 5 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2012-12-20   
720-588 6 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2012-12-20   
720-588 7 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2012-12-20   
720-588 8 DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2012-12-20   
720-588 9 DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2012-12-20   
720-589 A DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-589 0 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2013-09-30   
720-589 1 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2013-07-05   
720-589 2 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2013-07-05   
720-589 3 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2013-07-05   
720-589 4 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2013-07-05   
720-589 5 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2013-07-05   
720-589 6 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2013-07-05   
720-589 7 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2013-07-01   
720-589 8 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2013-07-01   
720-589 9 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2013-07-01   
720-590 A DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
720-590 0 DNVRCOII3MD  5562 METROPCS, INC. 656   2013-12-25   
720-590 1 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2013-04-09   
720-590 2 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2013-04-09   
720-590 3 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2013-04-09   
720-590 4 DNVTCOUZ0MD  829J PAETEC ITEL, LLC 656   2013-04-14   
720-590 5 DNVTCOUZ0MD  829J PAETEC ITEL, LLC 656   2013-04-14   
720-590 6 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2013-04-05   
720-590 7 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2013-04-05   
720-590 8 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2013-04-05   
720-590 9 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2013-04-09   
720-591 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-591 0 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2016-10-30   
720-591 1 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2016-10-30   
720-591 2 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2016-10-30   
720-591 3 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2016-10-30   
720-591 4 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2016-10-30   
720-591 5 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2016-10-30   
720-591 6 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2016-10-30   
720-591 7 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2016-10-30   
720-591 8 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2016-10-30   
720-591 9 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2016-10-30   
720-592 A DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-592 0 DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656   2017-02-11   
720-592 1 DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656   2017-02-11   
720-592 2 DNVTCOUZ0MD  829J PAETEC ITEL, LLC 656   2017-02-11   
720-592 3 DNVTCOUZ0MD  829J PAETEC ITEL, LLC 656   2017-02-11   
720-592 4 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2017-02-10   
720-592 5 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2017-02-10   
720-592 6 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2017-02-10   
720-592 7 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2017-02-10   
720-592 8 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2017-02-10   
720-592 9 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2017-02-10   
720-593 A AURSCOFWDS0  4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-593 0 DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2014-05-20   
720-593 1 DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2014-05-20   
720-593 2 DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2014-05-20   
720-593 3 DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2014-05-20   
720-593 4 DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2014-05-20   
720-593 5 AURSCOFWDS0  4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656   2014-05-17   
720-593 6 DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2014-05-20   
720-593 7 AURSCOFWDS0  4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656   2014-05-17   
720-593 8 DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2014-05-20   
720-593 9 DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2014-05-20   
720-594 A DNVRCO893MD  019J AIRUS, INC. - CO 656      
720-594 0 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2017-08-25   
720-594 1 DNVRCO893MD  019J AIRUS, INC. - CO 656   2017-08-21   
720-594 2 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2017-09-01   
720-594 3 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2017-09-01   
720-594 4 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2017-09-01   
720-594 5 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2017-09-01   
720-594 6 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2017-09-01   
720-594 7 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2017-09-01   
720-594 8 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2017-08-25   
720-594 9 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2017-08-25   
720-595 A DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-595 0 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2016-07-02   
720-595 1 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2016-07-02   
720-595 2 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2016-07-01   
720-595 3 DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656   2017-02-14   
720-595 4 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2016-07-02   
720-595 5 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2016-07-02   
720-595 6 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2016-07-02   
720-595 7 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2016-07-02   
720-595 8 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2016-07-02   
720-595 9 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2016-07-02   
720-596 A AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-596 0 AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-596 1 AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-596 2 AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-596 3 AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-596 4 DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656      
720-596 5 AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-596 6 AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-596 7 AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      

<< 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 >>

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.