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
303-895 8 DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2006-06-08   
303-895 9 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-896 A DNVRCOCPDS0  9636 QWEST CORPORATION 656      
303-897 A DNVRCOMAXTZ  6630 USA MOBILITY WIRELESS, INC. 656      
303-898 A DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
303-899 A DNVRCOMADS0  9636 QWEST CORPORATION 656      
303-901 A DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
303-901 0 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
303-901 1 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
303-901 2 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
303-901 3 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
303-901 4 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
303-901 5 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
303-901 6 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
303-901 7 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
303-901 8 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
303-901 9 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
303-902 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-903 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-904 A DNVRCOCLDS0  9636 QWEST CORPORATION 656      
303-905 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-906 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-907 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-908 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-909 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-910 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-912 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-913 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-914 A DNVRCOSWDS0  9636 QWEST CORPORATION 656      
303-915 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-916 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-917 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-917 0 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-917 1 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-917 2 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2003-08-08   
303-917 3 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2003-08-08   
303-917 4 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2003-08-08   
303-917 5 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2003-08-08   
303-917 6 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2003-08-08   
303-917 7 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-917 8 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2003-08-08   
303-917 9 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-918 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-919 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-920 A NGLNCOMADS0  9636 QWEST CORPORATION 656      
303-921 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-922 A DNVRCOWSDS0  9636 QWEST CORPORATION 656      
303-923 A DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-923 0 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-06-30   
303-923 1 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-923 2 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-923 3 DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656   2007-02-09   
303-923 4 DNVRCOZJNMD  7421 AT&T - LOCAL 656   2002-04-30   
303-923 5   026D ONVOY, LLC - CO 656   2008-08-29   
303-923 6 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-923 7 DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2023-06-24   
303-923 8   026D ONVOY, LLC - CO 656   2008-08-29   
303-923 9 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-924 A BLDRCOMADS0  9636 QWEST CORPORATION 656      
303-925 A ENWDCOABDS0  9636 QWEST CORPORATION 656      
303-926 A DNVRCOCWDS0  9636 QWEST CORPORATION 656      
303-927 A AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
303-927 0 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2010-05-08   
303-927 1 AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
303-927 2 AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
303-927 3 AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
303-927 4 AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
303-927 5 AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
303-927 6 DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656      
303-927 7 DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656      
303-927 8 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2007-10-15   
303-927 9 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2007-10-22   
303-928 A DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
303-928 0 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2007-08-17   
303-928 1 DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
303-928 2 DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
303-928 3 DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
303-928 4 DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
303-928 5 DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
303-928 6 DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
303-928 7 DNVTCOUZ0MD  829J PAETEC ITEL, LLC 656   2006-09-03   
303-928 8 DNVTCOUZ0MD  829J PAETEC ITEL, LLC 656   2006-09-03   
303-928 9 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2007-08-17   
303-929 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-930 A DNVRCODCDS0  9636 QWEST CORPORATION 656      
303-931 A DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
303-932 A DNVRCOCLDS0  9636 QWEST CORPORATION 656      
303-933 A DNVRCOCLDS0  9636 QWEST CORPORATION 656      
303-934 A DNVRCOWSDS0  9636 QWEST CORPORATION 656      
303-935 A DNVRCOWSDS0  9636 QWEST CORPORATION 656      
303-936 A DNVRCOWSDS0  9636 QWEST CORPORATION 656      
303-937 A DNVRCOWSDS0  9636 QWEST CORPORATION 656      
303-938 A BLDRCOMADS0  9636 QWEST CORPORATION 656      
303-939 A BLDRCOMADS0  9636 QWEST CORPORATION 656      
303-940 A ARVDCOMADS0  9636 QWEST CORPORATION 656      
303-941 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-942 A AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
303-942 0 DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656      
303-942 1 DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656      
303-942 2 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 91 >>

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.