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
303-323 A DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
303-323 0 DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
303-323 1 DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
303-323 2 DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
303-323 3 DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
303-323 4 DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
303-323 5 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2006-08-05   
303-323 6 DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
303-323 7 DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
303-323 8 DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
303-323 9 DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
303-324 A DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
303-325 A DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-325 0 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-325 1 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2006-10-11   
303-325 2 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-325 3 DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656   2005-07-18   
303-325 4 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2006-10-09   
303-325 5 DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656   2005-07-18   
303-325 6 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2006-10-09   
303-325 7 DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656   2005-07-18   
303-325 8 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-325 9 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-326 A AURRCOMADS0  9636 QWEST CORPORATION 656      
303-327 A DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-327 0 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-05-19   
303-327 1 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-327 2 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-327 3 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-327 4 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2004-02-25   
303-327 5 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2004-02-25   
303-327 6 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-327 7 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2004-02-25   
303-327 8 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2005-01-01   
303-327 9 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-328 A DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
303-328 0 DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
303-328 1 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2005-02-18   
303-328 2 DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656   2004-05-15   
303-328 3 DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656   2004-05-20   
303-328 4 DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
303-328 5 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2005-02-18   
303-328 6 DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
303-328 7 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2005-02-18   
303-328 8 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2005-02-18   
303-328 9 DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
303-329 A DNVRCOEADS0  9636 QWEST CORPORATION 656      
303-330 A DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
303-330 0 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2006-05-11   
303-330 1 DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2006-09-24   
303-330 2 DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2006-09-24   
303-330 3 DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2006-09-24   
303-330 4 DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2006-09-24   
303-330 5 DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2006-09-24   
303-330 6 DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2006-09-24   
303-330 7 DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2006-09-24   
303-330 8 DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2006-09-24   
303-330 9 DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2006-09-24   
303-331 A DNVRCOEADS0  9636 QWEST CORPORATION 656      
303-332 A DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
303-333 A DNVRCOEADS0  9636 QWEST CORPORATION 656      
303-334 A DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
303-335 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-335 0 DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2009-09-28   
303-335 1 AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656   2009-10-19   
303-335 2 DNVRCOMADS0  9636 QWEST CORPORATION 656      
303-335 3 DNVRCOMADS0  9636 QWEST CORPORATION 656      
303-335 4 DNVRCOCWDS0  9636 QWEST CORPORATION 656      
303-335 5 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2004-10-18   
303-335 6 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2004-10-18   
303-335 7 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2005-09-26   
303-335 8 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2005-09-26   
303-335 9 DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2009-09-28   
303-336 A DNVRCOEADS0  9636 QWEST CORPORATION 656      
303-337 A DNVRCOSLDS0  9636 QWEST CORPORATION 656      
303-338 A DNVRCOSLDS0  9636 QWEST CORPORATION 656      
303-339 A DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
303-339 0 DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656   2005-07-18   
303-339 1 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2004-08-28   
303-339 2 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2004-08-28   
303-339 3 DNVRCOETPS0  3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656   2007-08-23   
303-339 4 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2004-04-12   
303-339 5 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2004-04-12   
303-339 6 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2004-07-10   
303-339 7 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2004-07-10   
303-339 8 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2004-07-10   
303-339 9 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2004-08-28   
303-340 A AURRCOMADS0  9636 QWEST CORPORATION 656      
303-341 A AURRCOMADS0  9636 QWEST CORPORATION 656      
303-342 A DNVRCOOUDS0  9636 QWEST CORPORATION 656      
303-343 A AURRCOMADS0  9636 QWEST CORPORATION 656      
303-344 A AURRCOMADS0  9636 QWEST CORPORATION 656      
303-345 A DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-345 0 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2022-06-16   
303-345 1 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2004-01-20   
303-345 2 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-345 3 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2004-05-03   
303-345 4 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2004-06-16   
303-345 5 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2003-12-08   
303-345 6 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, 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.