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 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
970-621 A Berthoud CO ENWDCOVF0MD  9748 AMERICAN MESSAGING SERVICES, LLC 656      
970-622 A Loveland CO LVLDCOMADS0  9636 QWEST CORPORATION 656      
970-623 A Grand Junction CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
970-623 0 Grand Junction CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2006-08-10   
970-623 1 Grand Junction CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2006-09-28   
970-623 2 Grand Junction CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2006-09-28   
970-623 3 Grand Junction CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2006-10-09   
970-623 4 Grand Junction CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2006-10-16   
970-623 5 Grand Junction CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2006-10-30   
970-623 6 Grand Junction CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2006-12-11   
970-623 7 Grand Junction CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2006-11-05   
970-623 8 Grand Junction CO GDJTCOMADS0  9636 QWEST CORPORATION 656   2006-11-20   
970-623 9 Grand Junction CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2006-08-10   
970-624 A Loveland CO LVLDCOMADS0  9636 QWEST CORPORATION 656      
970-624 0 Loveland CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2006-08-29   
970-624 1 Loveland CO LVLDCOMADS0  9636 QWEST CORPORATION 656   2006-05-09   
970-624 2 Loveland CO LVLDCOMADS0  9636 QWEST CORPORATION 656   2006-05-09   
970-624 3 Loveland CO LVLDCOMADS0  9636 QWEST CORPORATION 656   2006-05-09   
970-624 4 Loveland CO LVLDCOMADS0  9636 QWEST CORPORATION 656   2006-05-09   
970-624 5 Loveland CO LVLDCOMADS0  9636 QWEST CORPORATION 656   2006-05-09   
970-624 6 Loveland CO DNVRCOETPS0  3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656   2007-05-21   
970-624 7 Loveland CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2014-06-09   
970-624 8 Loveland CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2012-12-13   
970-624 9 Loveland CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2006-09-15   
970-625 A Rifle CO RIFLCOMADS0  9636 QWEST CORPORATION 656      
970-626 A Ridgway CO RDGWCOMARS1  9636 QWEST CORPORATION 656      
970-626 0 Ridgway CO RDGWCOMARS1  9636 QWEST CORPORATION 656      
970-626 1 Ridgway CO RDGWCOMARS1  9636 QWEST CORPORATION 656      
970-626 2 Ridgway CO RDGWCOMARS1  9636 QWEST CORPORATION 656      
970-626 3 Ridgway CO RDGWCOMARS1  9636 QWEST CORPORATION 656      
970-626 4 Ridgway CO RDGWCOMARS1  9636 QWEST CORPORATION 656      
970-626 5 Ridgway CO RDGWCOMARS1  9636 QWEST CORPORATION 656      
970-626 6 Ridgway CO DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656   2004-11-11   
970-626 7 Ridgway CO HLRNCOFP1MD  508J CENTURYLINK COMMUNICATIONS, LLC 656   2014-11-05   
970-626 8 Ridgway CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2017-05-29   
970-626 9 Ridgway CO RDGWCOMARS1  9636 QWEST CORPORATION 656      
970-627 A Grand Lake CO GDLKCOMARS1  9636 QWEST CORPORATION 656      
970-627 0 Grand Lake CO GDLKCOMARS1  9636 QWEST CORPORATION 656      
970-627 1 Grand Lake CO GDLKCOMARS1  9636 QWEST CORPORATION 656      
970-627 2 Grand Lake CO GDLKCOMARS1  9636 QWEST CORPORATION 656      
970-627 3 Grand Lake CO GDLKCOMARS1  9636 QWEST CORPORATION 656      
970-627 4 Grand Lake CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2006-02-05   
970-627 5 Grand Lake CO GDLKCOMARS1  9636 QWEST CORPORATION 656      
970-627 6 Grand Lake CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2006-02-05   
970-627 7 Grand Lake CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2012-06-03   
970-627 8 Grand Lake CO GDLKCOMARS1  9636 QWEST CORPORATION 656      
970-627 9 Grand Lake CO GDLKCOMARS1  9636 QWEST CORPORATION 656      
970-628 A Grand Junction CO GDJTCOFD5MD  792K CHARTER IP ENABLED SERVICES, LLC 656      
970-628 0 Grand Junction CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2011-05-19   
970-628 1 Grand Junction CO GDJTCOFD5MD  792K CHARTER IP ENABLED SERVICES, LLC 656   2011-03-06   
970-628 2 Grand Junction CO DNVTCOUZ0MD  829J PAETEC ITEL, LLC 656   2011-12-01   
970-628 3 Grand Junction CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2011-05-19   
970-628 4 Grand Junction CO GDJTCOFD5MD  792K CHARTER IP ENABLED SERVICES, LLC 656   2011-09-23   
970-628 5 Grand Junction CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2011-09-13   
970-628 6 Grand Junction CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2012-09-10   
970-628 7 Grand Junction CO DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656   2012-11-01   
970-628 8 Grand Junction CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2023-09-29   
970-628 9 Grand Junction CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2012-12-12   
970-629 A Craig CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
970-629 0 Craig CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
970-629 1 Craig CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
970-629 2 Craig CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
970-629 3 Craig CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
970-629 4 Craig CO DNVRCO26DS5  278F PEERLESS NETWORK OF COLORADO, LLC - CO 656   2020-01-15   
970-629 5 Craig CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
970-629 6 Craig CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2016-07-15   
970-629 7 Craig CO HLRNCOFP1MD  508J CENTURYLINK COMMUNICATIONS, LLC 656   2014-05-23   
970-629 8 Craig CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
970-629 9 Craig CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
970-630 A Yuma CO DNVRCOMA47Z  6874 N.E. COLORADO CELLULAR, INC. 656      
970-631 A Fort Collins CO DNVRCOII0MD  6529 T-MOBILE USA, INC. 656      
970-631 0 Fort Collins CO DNVRCOII0MD  6529 T-MOBILE USA, INC. 656      
970-631 1 Fort Collins CO DNVRCOII0MD  6529 T-MOBILE USA, INC. 656      
970-631 2 Fort Collins CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2006-03-14   
970-631 3 Fort Collins CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2006-03-14   
970-631 4 Fort Collins CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2006-07-28   
970-631 5 Fort Collins CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2006-08-31   
970-631 6 Fort Collins CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2006-10-07   
970-631 7 Fort Collins CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2006-10-27   
970-631 8 Fort Collins CO DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656   2006-09-22   
970-631 9 Fort Collins CO DNVRCOII0MD  5562 METROPCS, INC. 656      
970-632 A Fort Collins CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
970-632 0 Fort Collins CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2016-06-11   
970-632 1 Fort Collins CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2016-06-30   
970-632 2 Fort Collins CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2016-07-15   
970-632 3 Fort Collins CO DNVRCOII0MD  6529 T-MOBILE USA, INC. 656   2016-07-17   
970-632 4 Fort Collins CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2016-07-25   
970-632 5 Fort Collins CO DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656   2016-07-13   
970-632 6 Fort Collins CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2016-06-08   
970-632 7 Fort Collins CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2016-06-08   
970-632 8 Fort Collins CO DNVRCOII0MD  6529 T-MOBILE USA, INC. 656   2016-07-17   
970-632 9 Fort Collins CO DNVRCO26XIX  073H TELNYX LLC 656   2017-03-23   
970-633 A Ouray CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656      
970-633 0 Ouray CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2010-04-12   
970-633 1 Ouray CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2012-12-17   
970-633 2 Ouray CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2015-05-23   
970-633 3 Ouray CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2015-08-05   
970-633 4 Ouray CO DNVRCO26XIX  073H TELNYX LLC 656   2018-05-02   
970-633 5 Ouray CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2018-06-08   
970-633 6 Ouray CO HLRNCOFP1MD  508J CENTURYLINK COMMUNICATIONS, LLC 656   2014-11-21   

<< 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 >>

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.