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: 303 [Rate centres in NPA 303] [Dial plan for NPA 303]

Block: A

<< 1 2 3 4 5 6 7 8 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
303-808 A Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
303-809 A Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
303-810 A Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
303-812 A Denver CO DNVRCOCHDS0  9636 QWEST CORPORATION 656      
303-813 A Denver CO DNVRCOCHDS0  9636 QWEST CORPORATION 656      
303-814 A Denver CO CSRKCONMDS0  9636 QWEST CORPORATION 656      
303-815 A Denver CO DNVRCO03DS1  5972 INTERLINK ADV SVC DBA FORETHOUGHT.NET - CO 656      
303-816 A Deckers CO BALYCOMADS1  9636 QWEST CORPORATION 656      
303-817 A Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-818 A Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-819 A Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-820 A Denver CO DNVRCOMADS0  9636 QWEST CORPORATION 656      
303-821 A Denver CO DNVRCOMAXTZ  6630 USA MOBILITY WIRELESS, INC. 656      
303-822 A Byers CO BYRSCOXCDS0  2181 BIJOU TEL. COOP. ASSN., INC. 656      
303-823 A Allens Park-Lyons CO LYNSCOMARS1  9636 QWEST CORPORATION 656      
303-824 A Denver CO AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
303-825 A Denver CO DNVRCOMADS0  9636 QWEST CORPORATION 656      
303-826 A Denver CO DNVRCOMAXTZ  6630 USA MOBILITY WIRELESS, INC. 656      
303-827 A Longmont CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-828 A Denver CO ERIECOMARS1  9636 QWEST CORPORATION 656      
303-829 A Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-830 A Denver CO DNVRCOCHDS0  9636 QWEST CORPORATION 656      
303-831 A Denver CO DNVRCOCHDS0  9636 QWEST CORPORATION 656      
303-832 A Denver CO DNVRCOCHDS0  9636 QWEST CORPORATION 656      
303-833 A Denver CO FRDRCOMADS0  9636 QWEST CORPORATION 656      
303-834 A Longmont CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-835 A Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-836 A Denver CO DNVRCOKFCM1  6907 COMMUNICATIONS UNLIMITED 656      
303-837 A Denver CO DNVRCOCHDS0  9636 QWEST CORPORATION 656      
303-838 A Deckers CO BALYCOMADS1  9636 QWEST CORPORATION 656      
303-839 A Denver CO DNVRCOCHDS0  9636 QWEST CORPORATION 656      
303-840 A Denver CO PRKRCOMADS0  9636 QWEST CORPORATION 656      
303-841 A Denver CO PRKRCOMADS0  9636 QWEST CORPORATION 656      
303-842 A Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-843 A Denver CO DNVRCODCDS0  9636 QWEST CORPORATION 656      
303-844 A Denver CO DNVRCOMADS0  9636 QWEST CORPORATION 656      
303-845 A Longmont CO AURRCOBUDS0  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
303-846 A Denver CO DNVRCODCDS0  9636 QWEST CORPORATION 656      
303-847 A Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-848 A Longmont CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-849 A Roggen CO RGGNCOXCDS0  2202 ROGGEN TEL. COOP. CO. 656      
303-850 A Denver CO DNVRCODCDS0  9636 QWEST CORPORATION 656      
303-851 A Denver CO DNVRCOMAXTZ  6630 USA MOBILITY WIRELESS, INC. 656      
303-852 A Denver CO DNVRCOMAXTZ  6630 USA MOBILITY WIRELESS, INC. 656      
303-853 A Denver CO DNVRCONEDS0  9636 QWEST CORPORATION 656      
303-854 A Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-855 A Denver CO DNVRCOMAXTZ  6630 USA MOBILITY WIRELESS, INC. 656      
303-856 A Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-857 A Fort Lupton CO FTLPCOMADS0  9636 QWEST CORPORATION 656      
303-858 A Denver CO ENWDCOABDS0  9636 QWEST CORPORATION 656      
303-859 A Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-860 A Denver CO DNVRCOCHDS0  9636 QWEST CORPORATION 656      
303-861 A Denver CO DNVRCOCHDS0  9636 QWEST CORPORATION 656      
303-862 A Denver CO DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656      
303-863 A Denver CO DNVRCOCHDS0  9636 QWEST CORPORATION 656      
303-864 A Denver CO DNVRCOCHDS0  9636 QWEST CORPORATION 656      
303-865 A Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-866 A Denver CO DNVRCOCHDS0  9636 QWEST CORPORATION 656      
303-867 A Denver CO DNVRCO89DS0  881B ILOKA, INC. DBA NEWCLOUD NETWORKS - CO 656      
303-868 A Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-869 A Denver CO DNVRCOCHDS0  9636 QWEST CORPORATION 656      
303-870 A Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-871 A Denver CO DNVRCOSODS0  9636 QWEST CORPORATION 656      
303-872 A Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-873 A Denver CO DNVRCOSLDS0  9636 QWEST CORPORATION 656      
303-874 A Denver CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-875 A Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
303-876 A Denver CO DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
303-877 A Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-878 A Denver CO DNVRCOMAXTZ  6630 USA MOBILITY WIRELESS, INC. 656      
303-879 A Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
303-880 A Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-881 A Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
303-882 A Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
303-883 A Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
303-884 A Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
303-885 A Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
303-886 A Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
303-887 A Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
303-888 A Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
303-889 A Denver CO DNVRCODCDS0  9636 QWEST CORPORATION 656      
303-890 A Denver CO DNVRCOMAXTZ  6630 USA MOBILITY WIRELESS, INC. 656      
303-891 A Denver CO DNVRCOMAXTZ  6630 USA MOBILITY WIRELESS, INC. 656      
303-892 A Denver CO DNVRCOMADS0  9636 QWEST CORPORATION 656      
303-893 A Denver CO DNVRCOMADS0  9636 QWEST CORPORATION 656      
303-894 A Denver CO DNVRCOCHDS0  9636 QWEST CORPORATION 656      
303-895 A Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-896 A Denver CO DNVRCOCPDS0  9636 QWEST CORPORATION 656      
303-897 A Denver CO DNVRCOMAXTZ  6630 USA MOBILITY WIRELESS, INC. 656      
303-898 A Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
303-899 A Denver CO DNVRCOMADS0  9636 QWEST CORPORATION 656      
303-900 A Georgetown CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
303-901 A Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
303-902 A Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-903 A Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-904 A Denver CO DNVRCOCLDS0  9636 QWEST CORPORATION 656      
303-905 A Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-906 A Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-907 A Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-908 A Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      

<< 1 2 3 4 5 6 7 8 >>

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.