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.

NPA: 720 [Rate centres in NPA 720] [Dial plan for NPA 720]

<< 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 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
720-248 2 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2006-07-10   
720-248 3 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2006-07-10   
720-248 4 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2006-07-10   
720-248 5 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2006-07-10   
720-248 6 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2006-07-10   
720-248 7 Denver CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2010-02-20   
720-248 8 Denver CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2010-02-20   
720-248 9 Denver CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2010-07-03   
720-249 A Denver CO DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
720-249 0 Denver CO DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
720-249 1 Denver CO DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
720-249 2 Denver CO DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
720-249 3 Denver CO DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
720-249 4 Denver CO DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
720-249 5 Denver CO DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
720-249 6 Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2006-10-02   
720-249 7 Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2006-10-02   
720-249 8 Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2006-10-02   
720-249 9 Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2006-10-02   
720-250 A Denver CO DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
720-250 0 Denver CO DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
720-250 1 Denver CO ENWDCOABDS0  9636 QWEST CORPORATION 656   2004-06-07   
720-250 2 Denver CO ENWDCOABDS0  9636 QWEST CORPORATION 656   2004-06-07   
720-250 3 Denver CO ENWDCOABDS0  9636 QWEST CORPORATION 656   2004-06-07   
720-250 4 Denver CO ENWDCOABDS0  9636 QWEST CORPORATION 656   2004-06-07   
720-250 5 Denver CO ENWDCOABDS0  9636 QWEST CORPORATION 656   2004-06-07   
720-250 6 Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2006-09-24   
720-250 7 Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2006-09-24   
720-250 8 Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2006-09-24   
720-250 9 Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2008-10-09   
720-251 A Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-251 0 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2005-10-02   
720-251 1 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2005-06-10   
720-251 2 Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2004-09-18   
720-251 3 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2005-10-02   
720-251 4 Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-251 5 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2006-03-05   
720-251 6 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2006-08-06   
720-251 7 Denver CO DNVRCO2669Z  490J DISH WIRELESS, LLC 656   2024-09-07   
720-251 8 Denver CO DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656   2006-07-09   
720-251 9 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2006-08-06   
720-252 A Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-252 0 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2008-10-25   
720-252 1 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2008-10-25   
720-252 2 Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2007-01-11   
720-252 3 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-252 4 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-252 5 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-252 6 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-252 7 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-252 8 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-252 9 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-253 A Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-253 0 Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2008-10-09   
720-253 1 Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2008-10-09   
720-253 2 Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2007-01-11   
720-253 3 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-253 4 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-253 5 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-253 6 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-253 7 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-253 8 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-253 9 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-254 A Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-254 0 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2007-06-11   
720-254 1 Denver CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2008-11-20   
720-254 2 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2007-06-11   
720-254 3 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-254 4 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-254 5 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-254 6 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-254 7 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-254 8 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-254 9 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-255 A Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-255 0 Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2008-10-09   
720-255 1 Denver CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2008-11-20   
720-255 2 Denver CO DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656   2007-03-17   
720-255 3 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-255 4 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-255 5 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-255 6 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-255 7 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-255 8 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-255 9 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-256 A Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-256 0 Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2007-11-11   
720-256 1 Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2008-11-07   
720-256 2 Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2008-10-09   
720-256 3 Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2008-11-07   
720-256 4 Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2008-11-07   
720-256 5 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-256 6 Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2008-11-07   
720-256 7 Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2008-11-07   
720-256 8 Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2008-11-07   
720-256 9 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-257 A Denver CO DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
720-257 0 Denver CO DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
720-257 1 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2006-04-06   
720-257 2 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2006-04-06   

<< 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 >>

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.