Local Calling Guide

Area code/prefix search

Search by area code/prefix (NPA/NXX) or OCN

  • 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.

Last updated: Sat, 26 Jul 2014 03:21:21 UTC

How to use this page

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

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 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA Eff date Disc date Map
303-200 A Denver CO AURRCOBUDS0 7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO [link] 656 map
303-200 0 Denver CO 320A COMCAST PHONE OF COLORADO, LLC - CO [link] 656
303-200 1 Denver CO 7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO [link] 656
303-200 2 Denver CO 7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO [link] 656
303-200 3 Denver CO 7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO [link] 656
303-200 4 Denver CO 7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO [link] 656
303-200 5 Denver CO 7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO [link] 656
303-200 6 Denver CO 7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO [link] 656
303-200 7 Denver CO 7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO [link] 656
303-200 8 Denver CO 7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO [link] 656
303-200 9 Denver CO 7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO [link] 656
303-201 A Denver CO DNVRCOMAXTZ 6630 USA MOBILITY WIRELESS, INC. [link] 656 map
303-202 A Denver CO LKWDCOMADS0 9636 QWEST CORPORATION [link] 656 map
303-203 A Denver CO DNVRCOMAX8Z 9748 AMERICAN MESSAGING (AM), INC. [link] 656 map
303-204 A Denver CO ENWDCOFFCM2 6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO [link] 656 map
303-205 A Denver CO LKWDCOMADS0 9636 QWEST CORPORATION [link] 656 map
303-206 A Denver CO DNVRCOMAXTZ 6630 USA MOBILITY WIRELESS, INC. [link] 656 map
303-207 A Denver CO DNVRCOMAXTZ 6630 USA MOBILITY WIRELESS, INC. [link] 656 map
303-208 A Denver CO DNVRCOMAXTZ 6630 USA MOBILITY WIRELESS, INC. [link] 656 map
303-209 A Denver CO DNVRCO37DS0 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC [link] 656 map
303-210 A Denver CO 6664 SPRINT SPECTRUM L.P. [link] 656 map
303-212 A Denver CO ENWDCOHJCM1 6613 CONTACT PAGING OF COLORADO, INC. [link] 656 map
303-213 A Denver CO DNVRCOMAXTZ 6630 USA MOBILITY WIRELESS, INC. [link] 656 map
303-214 A Aurora CO DNVRCO37DS0 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC [link] 656 map
303-214 0 Aurora CO 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC [link] 656
303-214 1 Aurora CO 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC [link] 656
303-214 2 Aurora CO 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC [link] 656
303-214 3 Aurora CO 881B ILOKA, INC. DBA NEWCLOUD NETWORKS - CO [link] 656 2007-04-14
303-214 4 Aurora CO 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC [link] 656
303-214 5 Aurora CO 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC [link] 656
303-214 6 Aurora CO 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC [link] 656
303-214 7 Aurora CO 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC [link] 656
303-214 8 Aurora CO 6529 T-MOBILE USA, INC. [link] 656 2009-10-23
303-214 9 Aurora CO 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC [link] 656
303-215 A Denver CO GLDNCOMADS0 9636 QWEST CORPORATION [link] 656 map
303-216 A Denver CO GLDNCOMADS0 9636 QWEST CORPORATION [link] 656 map
303-217 A Denver CO DNVRCO37DS0 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC [link] 656 map
303-217 0 Denver CO 6010 NEW CINGULAR WIRELESS PCS, LLC [link] 656 2004-10-17
303-217 1 Denver CO 6010 NEW CINGULAR WIRELESS PCS, LLC [link] 656 2004-10-17
303-217 2 Denver CO 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC [link] 656
303-217 3 Denver CO 6010 NEW CINGULAR WIRELESS PCS, LLC [link] 656 2004-11-04
303-217 4 Denver CO 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC [link] 656
303-217 5 Denver CO 2490 CBEYOND COMMUNICATIONS, LLC - CO [link] 656 2003-02-26
303-217 6 Denver CO 6529 T-MOBILE USA, INC. [link] 656 2005-08-01
303-217 7 Denver CO 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC [link] 656
303-217 8 Denver CO 3467 ESCHELON TELECOM OF COLORADO, INC. - CO [link] 656 2005-02-06
303-217 9 Denver CO 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC [link] 656
303-218 A Denver CO DNVRCO37DS0 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC [link] 656 map
303-218 0 Denver CO 6010 NEW CINGULAR WIRELESS PCS, LLC [link] 656 2007-10-20
303-218 1 Denver CO 7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC [link] 656



Sponsored by: VoiceMeUp - Corporate VoIP Services