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 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
720-803 8 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2021-05-02   
720-803 9 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2021-03-16   
720-804 A Longmont CO DNVRCOMA38Z  553J WHITESKY COMMUNICATIONS, LLC 656      
720-804 0 Longmont CO DNVRCO26DS5  278F PEERLESS NETWORK OF COLORADO, LLC - CO 656   2021-05-31   
720-804 1 Longmont CO DNVRCOMA38Z  553J WHITESKY COMMUNICATIONS, LLC 656   2021-05-02   
720-804 2 Longmont CO DNVRCO26XLX  939H COMMIO, LLC 656   2021-08-28   
720-804 3 Longmont CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2021-05-29   
720-804 4 Longmont CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2021-05-29   
720-804 5 Longmont CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2021-05-29   
720-804 6 Longmont CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2021-05-29   
720-804 7 Longmont CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2021-05-29   
720-804 8 Longmont CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2021-05-29   
720-804 9 Longmont CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2021-05-23   
720-805 A Denver CO DNVTCOZI9MD  597F VOIP INNOVATIONS, LLC 656      
720-805 0 Denver CO DNVTCOZI9MD  597F VOIP INNOVATIONS, LLC 656   2018-09-29   
720-805 1 Denver CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2018-10-02   
720-805 2 Denver CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2018-10-02   
720-805 3 Denver CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2018-10-02   
720-805 4 Denver CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2018-10-18   
720-805 5 Denver CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2018-10-18   
720-805 6 Denver CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2018-10-18   
720-805 7 Denver CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2018-10-18   
720-805 8 Denver CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2018-10-18   
720-805 9 Denver CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2018-10-18   
720-806 A Deckers CO DNVRCO26DS5  278F PEERLESS NETWORK OF COLORADO, LLC - CO 656      
720-806 0 Deckers CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2021-04-26   
720-806 1 Deckers CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2021-04-26   
720-806 2 Deckers CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2021-08-16   
720-806 3 Deckers CO DNVRCOSOFMD  624H ONVOY SPECTRUM, LLC 656   2021-07-19   
720-806 4 Deckers CO DNVRCO26DS5  278F PEERLESS NETWORK OF COLORADO, LLC - CO 656   2021-05-30   
720-806 5 Deckers CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2021-05-09   
720-806 6 Deckers CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2021-05-09   
720-806 7 Deckers CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2021-04-26   
720-806 8 Deckers CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2021-04-26   
720-806 9 Deckers CO DNVRCO26DS5  278F PEERLESS NETWORK OF COLORADO, LLC - CO 656   2021-04-25   
720-807 A Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
720-807 0 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2020-10-16   
720-807 1 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2020-10-16   
720-807 2 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2020-10-16   
720-807 3 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2020-10-16   
720-807 4 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2020-10-16   
720-807 5 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2020-10-16   
720-807 6 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2020-10-16   
720-807 7 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2020-10-16   
720-807 8 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2020-10-16   
720-807 9 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2020-10-16   
720-808 A Denver CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656      
720-808 0 Denver CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2010-12-19   
720-808 1 Denver CO DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2010-12-19   
720-808 2 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2012-03-09   
720-808 3 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2012-03-09   
720-808 4 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2012-03-09   
720-808 5 Denver CO DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656   2014-04-03   
720-808 6 Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2014-04-04   
720-808 7 Denver CO DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656   2014-04-04   
720-808 8 Denver CO DNVRCOII3MD  5562 METROPCS, INC. 656   2013-11-11   
720-808 9 Denver CO   026D ONVOY, LLC - CO 656   2010-12-21   
720-809 A Denver CO DNVRCOII3MD  5562 METROPCS, INC. 656      
720-809 0 Denver CO DNVRCOII3MD  5562 METROPCS, INC. 656   2014-10-13   
720-809 1 Denver CO DNVRCOII3MD  5562 METROPCS, INC. 656   2014-10-23   
720-809 2 Denver CO DNVRCOII3MD  5562 METROPCS, INC. 656   2014-11-19   
720-809 3 Denver CO DNVRCOII3MD  5562 METROPCS, INC. 656   2014-10-23   
720-809 4 Denver CO DNVRCOII3MD  5562 METROPCS, INC. 656   2014-11-19   
720-809 5 Denver CO DNVRCOII3MD  5562 METROPCS, INC. 656   2014-11-19   
720-809 6 Denver CO DNVRCOII3MD  5562 METROPCS, INC. 656   2014-10-23   
720-809 7 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2014-10-21   
720-809 8 Denver CO DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2014-10-21   
720-809 9 Denver CO DNVRCOII3MD  5562 METROPCS, INC. 656   2014-10-23   
720-810 A Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-810 0 Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-810 1 Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-810 2 Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-810 3 Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-810 4 Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-810 5 Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-810 6 Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2007-05-07   
720-810 7 Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-810 8 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2007-07-07   
720-810 9 Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2007-09-27   
720-812 A Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-812 0 Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2020-05-08   
720-812 1 Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2020-05-08   
720-812 2 Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2020-05-08   
720-812 3 Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2020-05-08   
720-812 4 Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2020-05-08   
720-812 5 Denver CO DNVRCO26DS5  278F PEERLESS NETWORK OF COLORADO, LLC - CO 656   2020-12-30   
720-812 6 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2020-12-30   
720-812 7 Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2020-05-08   
720-812 8 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2021-01-05   
720-812 9 Denver CO DNVTCOZI6MD  073H TELNYX LLC 656   2021-01-05   
720-813 A Denver CO DNVTCOZICMD  515J IP HORIZON LLC 656      
720-813 0 Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2021-08-12   
720-813 1 Denver CO   515J IP HORIZON LLC 656   2021-04-26   
720-813 2 Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2021-09-13   
720-813 3 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2021-08-29   
720-813 4 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2021-08-29   
720-813 5 Denver CO DNVRCOII3MD  6529 T-MOBILE USA, INC. 656   2021-08-29   
720-813 6 Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2021-09-13   
720-813 7 Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2021-09-27   
720-813 8 Denver CO AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2021-10-16   

<< 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 >>

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.