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
720-901 9   278F PEERLESS NETWORK OF COLORADO, LLC - CO 656   2022-01-16   
720-902 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-902 0   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2019-06-15   
720-902 1   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2019-06-15   
720-902 2   026D ONVOY, LLC - CO 656   2020-03-02   
720-902 3   026D ONVOY, LLC - CO 656   2020-03-02   
720-902 4   026D ONVOY, LLC - CO 656   2020-03-02   
720-902 5   026D ONVOY, LLC - CO 656   2020-03-02   
720-902 6   026D ONVOY, LLC - CO 656   2020-03-02   
720-902 7   026D ONVOY, LLC - CO 656   2020-03-02   
720-902 8   026D ONVOY, LLC - CO 656   2020-03-02   
720-902 9   026D ONVOY, LLC - CO 656   2020-03-02   
720-903 A   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-903 0   6010 NEW CINGULAR WIRELESS PCS, LLC 656   2008-06-18   
720-903 1   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-903 2   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-903 3   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-903 4   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-903 5   6529 T-MOBILE USA, INC. 656   2008-01-17   
720-903 6   6529 T-MOBILE USA, INC. 656   2008-01-17   
720-903 7   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-903 8   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-903 9   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2024-12-14   
720-904 A DNVRCOMADS0  9636 QWEST CORPORATION 656      
720-905 A DNVRCO26X1Y  598J FIVE9, INC. 656      
720-905 0   598J FIVE9, INC. 656   2022-03-28   
720-905 1   5562 METROPCS, INC. 656   2022-04-26   
720-905 2   026D ONVOY, LLC - CO 656   2022-05-07   
720-905 3   026D ONVOY, LLC - CO 656   2022-05-07   
720-905 4   026D ONVOY, LLC - CO 656   2022-05-07   
720-905 5   5562 METROPCS, INC. 656   2022-04-15   
720-905 6   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-05-19   
720-905 7   5562 METROPCS, INC. 656   2022-04-26   
720-905 8   7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656   2022-04-05   
720-905 9   7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656   2022-04-05   
720-907 A   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-907 0   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-907 1   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-907 2   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-907 3   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-907 4   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-907 5   5562 METROPCS, INC. 656   2013-11-26   
720-907 6   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-907 7   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-907 8   278F PEERLESS NETWORK OF COLORADO, LLC - CO 656   2013-04-26   
720-907 9   6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-908 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-908 0   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2017-06-29   
720-908 1   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2017-06-29   
720-908 2   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2017-06-29   
720-908 3   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2017-06-29   
720-908 4   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2017-06-29   
720-908 5   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2017-06-29   
720-908 6   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2017-06-29   
720-908 7   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2017-06-29   
720-908 8   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2017-06-29   
720-908 9   5562 METROPCS, INC. 656   2017-06-30   
720-909 A DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656      
720-909 0   5562 METROPCS, INC. 656   2018-07-03   
720-909 1   5562 METROPCS, INC. 656   2018-07-13   
720-909 2   5562 METROPCS, INC. 656   2018-07-13   
720-909 3   078F BANDWIDTH.COM CLEC, LLC - CO 656   2018-10-22   
720-909 4   5562 METROPCS, INC. 656   2018-07-24   
720-909 5   5562 METROPCS, INC. 656   2018-07-24   
720-909 6   026D ONVOY, LLC - CO 656   2018-05-05   
720-909 7   026D ONVOY, LLC - CO 656   2018-05-05   
720-909 8   078F BANDWIDTH.COM CLEC, LLC - CO 656   2018-07-27   
720-909 9   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   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-05-09   
720-910 1   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-05-09   
720-910 2   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-05-09   
720-910 3   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-05-09   
720-910 4   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-05-09   
720-910 5   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-05-09   
720-910 6   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-05-09   
720-910 7   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-05-09   
720-910 8   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-05-09   
720-910 9   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-05-09   
720-912 A DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
720-912 0   026D ONVOY, LLC - CO 656   2020-12-04   
720-912 1   026D ONVOY, LLC - CO 656   2020-12-04   
720-912 2   026D ONVOY, LLC - CO 656   2020-12-04   
720-912 3   026D ONVOY, LLC - CO 656   2020-12-04   
720-912 4   026D ONVOY, LLC - CO 656   2020-12-04   
720-912 5   026D ONVOY, LLC - CO 656   2020-12-04   
720-912 6   026D ONVOY, LLC - CO 656   2020-12-04   
720-912 7   026D ONVOY, LLC - CO 656   2020-12-04   
720-912 8   026D ONVOY, LLC - CO 656   2020-12-04   
720-912 9   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   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-08-20   
720-916 1   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-08-20   
720-916 2   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-08-20   
720-916 3   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-08-20   
720-916 4   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-08-20   
720-916 5   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-08-20   
720-916 6   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-08-20   
720-916 7   6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-08-20   

<< 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: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.