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
720-905 9 FTCLCOMAAMD  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656   2022-04-05   
720-907 A DNVTCO56AMD  8465 GLOBAL CROSSING LOCAL SERVICES, INC. - CO 656      
720-907 0 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-907 1 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-907 2 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-907 3 DNVTCO56AMD  8465 GLOBAL CROSSING LOCAL SERVICES, INC. - CO 656      
720-907 4 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-907 5 DNVRCOII3MD  5562 METROPCS, INC. 656   2013-11-26   
720-907 6 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-907 7 DNVTCO56AMD  8465 GLOBAL CROSSING LOCAL SERVICES, INC. - CO 656      
720-907 8 DNVRCO26DS5  278F PEERLESS NETWORK OF COLORADO, LLC - CO 656   2013-04-26   
720-907 9 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-908 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-908 0 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2017-06-29   
720-908 1 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2017-06-29   
720-908 2 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2017-06-29   
720-908 3 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2017-06-29   
720-908 4 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2017-06-29   
720-908 5 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2017-06-29   
720-908 6 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2017-06-29   
720-908 7 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2017-06-29   
720-908 8 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2017-06-29   
720-908 9 DNVRCOII3MD  5562 METROPCS, INC. 656   2017-06-30   
720-909 A DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656      
720-909 0 DNVRCOII3MD  5562 METROPCS, INC. 656   2018-07-03   
720-909 1 DNVRCOII3MD  5562 METROPCS, INC. 656   2018-07-13   
720-909 2 DNVRCOII3MD  5562 METROPCS, INC. 656   2018-07-13   
720-909 3 DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2018-10-22   
720-909 4 DNVRCOII3MD  5562 METROPCS, INC. 656   2018-07-24   
720-909 5 DNVRCOII3MD  5562 METROPCS, INC. 656   2018-07-24   
720-909 6 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2018-05-05   
720-909 7 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2018-05-05   
720-909 8 DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2018-07-27   
720-909 9 DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2018-03-14   
720-910 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-910 0 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-05-09   
720-910 1 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-05-09   
720-910 2 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-05-09   
720-910 3 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-05-09   
720-910 4 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-05-09   
720-910 5 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-05-09   
720-910 6 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-05-09   
720-910 7 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-05-09   
720-910 8 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-05-09   
720-910 9 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-05-09   
720-912 A DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
720-912 0 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2020-12-04   
720-912 1 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2020-12-04   
720-912 2 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2020-12-04   
720-912 3 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2020-12-04   
720-912 4 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2020-12-04   
720-912 5 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2020-12-04   
720-912 6 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2020-12-04   
720-912 7 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2020-12-04   
720-912 8 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2020-12-04   
720-912 9 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2020-12-04   
720-913 A DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-916 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-916 0 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-08-20   
720-916 1 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-08-20   
720-916 2 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-08-20   
720-916 3 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-08-20   
720-916 4 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-08-20   
720-916 5 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-08-20   
720-916 6 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-08-20   
720-916 7 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-08-20   
720-916 8 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-08-20   
720-916 9 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-08-20   
720-917 A DNVRCOCHDS0  9636 QWEST CORPORATION 656      
720-917 0 DNVRCOCHDS0  9636 QWEST CORPORATION 656      
720-917 1 DNVRCOCHDS0  9636 QWEST CORPORATION 656      
720-917 2 DNVRCOCHDS0  9636 QWEST CORPORATION 656      
720-917 3 DNVRCOCHDS0  9636 QWEST CORPORATION 656      
720-917 4 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2008-01-17   
720-917 5 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2008-01-17   
720-917 6 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2008-01-17   
720-917 7 DNVRCOCHDS0  9636 QWEST CORPORATION 656      
720-917 8 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2009-10-16   
720-917 9 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2009-01-06   
720-919 A DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-919 0 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2016-10-07   
720-919 1 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2016-10-07   
720-919 2 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2016-10-07   
720-919 3 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2016-10-07   
720-919 4 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2016-10-07   
720-919 5 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2016-10-07   
720-919 6 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2016-10-07   
720-919 7 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2016-10-07   
720-919 8 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2016-10-07   
720-919 9 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2016-10-07   
720-920 A AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-920 0 AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-920 1 AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-920 2 AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-920 3 AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-920 4 AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-920 5 AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-920 6 AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-920 7 AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-920 8 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: LES.NET

Like this site? We accept donations via PayPal.