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.

Region: 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 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
970-232 5 Fort Collins CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2005-10-07   
970-232 6 Fort Collins CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2005-10-16   
970-232 7 Fort Collins CO   145J TERRA NOVA TELECOM INC. 656   2021-04-28   
970-232 8 Fort Collins CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2005-10-16   
970-232 9 Fort Collins CO DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656   2006-02-02   
970-233 A Collbran CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
970-233 0 Collbran CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2012-12-17   
970-233 1 Collbran CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2018-12-30   
970-233 2 Collbran CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2013-04-04   
970-233 3 Collbran CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2019-09-09   
970-233 4 Collbran CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2019-09-09   
970-233 5 Collbran CO HLRNCOFP1MD  508J CENTURYLINK COMMUNICATIONS, LLC 656   2014-11-05   
970-233 6 Collbran CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2012-03-15   
970-233 7 Collbran CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2007-08-30   
970-233 8 Collbran CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2010-11-28   
970-233 9 Collbran CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2018-12-30   
970-234 A Grand Junction CO DNVRCOII0MD  6529 T-MOBILE USA, INC. 656      
970-235 A Estes Park CO DNVRCOETPS0  3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
970-235 0 Estes Park CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2011-01-10   
970-235 1 Estes Park CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2010-02-20   
970-235 2 Estes Park CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2012-02-19   
970-235 3 Estes Park CO DNVRCOETPS0  3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656   2009-12-05   
970-235 4 Estes Park CO DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656   2012-07-03   
970-235 5 Estes Park CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2012-12-17   
970-235 6 Estes Park CO FTCLCOMAAMD  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656   2012-12-13   
970-235 7 Estes Park CO HLRNCOFP1MD  508J CENTURYLINK COMMUNICATIONS, LLC 656   2014-05-23   
970-235 8 Estes Park CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2013-04-04   
970-235 9 Estes Park CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2013-04-13   
970-236 A Aspen CO ASPECOMAGT0  588A ZIPPYTECH INCORPORATED 656      
970-236 0 Aspen CO ASPECOMAGT0  588A ZIPPYTECH INCORPORATED 656   2009-08-27   
970-236 1 Aspen CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2012-05-27   
970-236 2 Aspen CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2012-12-12   
970-236 3 Aspen CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2012-12-12   
970-236 4 Aspen CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2012-12-12   
970-236 5 Aspen CO ASPECOMAGT0  588A ZIPPYTECH INCORPORATED 656   2010-06-20   
970-236 6 Aspen CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2010-12-25   
970-236 7 Aspen CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2012-12-12   
970-236 8 Aspen CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2014-04-14   
970-236 9 Aspen CO DNVRCO26DS5  278F PEERLESS NETWORK OF COLORADO, LLC - CO 656   2012-10-27   
970-237 A Fort Collins CO FTCLCOHMDS0  9636 QWEST CORPORATION 656      
970-237 0 Fort Collins CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2008-08-23   
970-237 1 Fort Collins CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2008-01-19   
970-237 2 Fort Collins CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2008-01-31   
970-237 3 Fort Collins CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2008-01-28   
970-237 4 Fort Collins CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2008-01-28   
970-237 5 Fort Collins CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2008-02-01   
970-237 6 Fort Collins CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2008-02-13   
970-237 7 Fort Collins CO FTCLCOHMDS0  9636 QWEST CORPORATION 656   2007-06-25   
970-237 8 Fort Collins CO FTCLCOHMDS0  9636 QWEST CORPORATION 656   2007-06-25   
970-237 9 Fort Collins CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2009-12-19   
970-238 A Marvel CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
970-238 0 Marvel CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2009-05-22   
970-238 1 Marvel CO DURNCOMA6MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2010-11-26   
970-238 2 Marvel CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2017-05-19   
970-238 3 Marvel CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2012-12-13   
970-238 4 Marvel CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2012-12-13   
970-238 5 Marvel CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2012-12-13   
970-238 6 Marvel CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2013-03-26   
970-238 7 Marvel CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2007-08-31   
970-238 8 Marvel CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2011-02-11   
970-238 9 Marvel CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2020-10-30   
970-239 A Telluride CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
970-239 0 Telluride CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2006-06-23   
970-239 1 Telluride CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2008-11-20   
970-239 2 Telluride CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2018-12-31   
970-239 3 Telluride CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2012-10-06   
970-239 4 Telluride CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
970-239 5 Telluride CO FTCLCOMAAMD  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656   2022-01-24   
970-239 6 Telluride CO GDJTCOMAZMD  793K TWC IP ENABLED SERVICES, LLC 656   2007-04-25   
970-239 7 Telluride CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2006-10-29   
970-239 8 Telluride CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2013-04-04   
970-239 9 Telluride CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2018-12-31   
970-240 A Montrose CO MTRSCOMADS0  9636 QWEST CORPORATION 656      
970-241 A Grand Junction CO GDJTCOMADS0  9636 QWEST CORPORATION 656      
970-242 A Grand Junction CO GDJTCOMADS0  9636 QWEST CORPORATION 656      
970-243 A Grand Junction CO GDJTCOMADS0  9636 QWEST CORPORATION 656      
970-244 A Grand Junction CO GDJTCOMADS0  9636 QWEST CORPORATION 656      
970-245 A Grand Junction CO GDJTCOMADS0  9636 QWEST CORPORATION 656      
970-246 A Otis CO OTISCOXCRS1  2185 CENTURYTEL OF EAGLE, INC. DBA CENTURYLINK 656      
970-247 A Durango CO DURNCOMADS0  9636 QWEST CORPORATION 656      
970-248 A Grand Junction CO GDJTCOMADS0  9636 QWEST CORPORATION 656      
970-249 A Montrose CO MTRSCOMADS0  9636 QWEST CORPORATION 656      
970-250 A Grand Junction CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
970-251 A Crested Butte CO CRBTCOMARS1  9636 QWEST CORPORATION 656      
970-251 0 Crested Butte CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2012-02-04   
970-251 1 Crested Butte CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2013-04-04   
970-251 2 Crested Butte CO   883K AHOI LLC 656   2026-06-27   
970-251 3 Crested Butte CO CRBTCOMARS1  9636 QWEST CORPORATION 656   2008-10-10   
970-251 4 Crested Butte CO FTCLCOMAAMD  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656   2012-12-13   
970-251 5 Crested Butte CO GDJTCOMAZMD  793K TWC IP ENABLED SERVICES, LLC 656   2007-04-25   
970-251 7 Crested Butte CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2007-03-18   
970-251 8 Crested Butte CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2012-12-17   
970-251 9 Crested Butte CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2013-03-24   
970-252 A Montrose CO MTRSCOMADS0  9636 QWEST CORPORATION 656      
970-253 A South Sidney CO SDNYNENWDS0  9631 QWEST CORPORATION 646      
970-253 0 South Sidney CO SDNYNENWDS0  9631 QWEST CORPORATION 646      
970-253 1 South Sidney CO SDNYNENWDS0  9631 QWEST CORPORATION 646      
970-253 2 South Sidney CO GDISNENW6MD  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 646      
970-253 3 South Sidney CO SDNYNENWDS0  9631 QWEST CORPORATION 646      
970-253 4 South Sidney CO SDNYNENWDS0  9631 QWEST CORPORATION 646      

<< 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 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 >>

Last updated: Tue, 16 Jun 2026 00:09:45 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.