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.

Denver, 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 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
303-654 A BITNCOMADS0  9636 QWEST CORPORATION 656      
303-655 A BITNCOMADS0  9636 QWEST CORPORATION 656      
303-656 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
303-656 0 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2009-09-11   
303-656 1 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2009-09-11   
303-656 2 DNVTCOZIDS1  026D ONVOY, LLC - CO 656   2019-05-07   
303-656 3 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2009-09-11   
303-656 4 DNVTCOUZAMD  4788 MCLEODUSA TELECOMMUNICATION SERVICES, INC. - CO 656   2009-08-27   
303-656 5 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2009-09-11   
303-656 6 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2009-09-11   
303-656 7 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2009-09-11   
303-656 8 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2009-09-11   
303-656 9 DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656   2009-09-28   
303-657 A WMNSCOMADS0  9636 QWEST CORPORATION 656      
303-658 A LTTNCOMADS0  9636 QWEST CORPORATION 656      
303-658 0 DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656   2009-06-18   
303-658 1 LTTNCOMADS0  9636 QWEST CORPORATION 656      
303-658 2 WMNSCOMADS0  9636 QWEST CORPORATION 656      
303-658 3 DNVRCOCPDS0  9636 QWEST CORPORATION 656      
303-658 4 WMNSCOMADS0  9636 QWEST CORPORATION 656      
303-658 5 LTTNCOMADS0  9636 QWEST CORPORATION 656      
303-658 6 ENWDCOABDS0  9636 QWEST CORPORATION 656      
303-658 7 ENWDCOABDS0  9636 QWEST CORPORATION 656      
303-658 8 ENWDCOABDS0  9636 QWEST CORPORATION 656      
303-658 9 ENWDCO47DS3  8980 XO COLORADO, LLC 656   2009-02-23   
303-659 A BITNCOMADS0  9636 QWEST CORPORATION 656      
303-660 A CSRKCONMDS0  9636 QWEST CORPORATION 656      
303-661 A DNVRCOCWDS0  9636 QWEST CORPORATION 656      
303-661 0 DNVRCOCWDS0  9636 QWEST CORPORATION 656      
303-661 1 DNVRCOCWDS0  9636 QWEST CORPORATION 656      
303-661 2 DNVRCOCWDS0  9636 QWEST CORPORATION 656      
303-661 3 DNVRCOCWDS0  9636 QWEST CORPORATION 656      
303-661 4 DNVRCOCWDS0  9636 QWEST CORPORATION 656      
303-661 5 DNVRCOCWDS0  9636 QWEST CORPORATION 656      
303-661 6 DNVRCOCWDS0  9636 QWEST CORPORATION 656      
303-661 7 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656   2015-07-23   
303-661 8   939H COMMIO, LLC 656   2024-03-25   
303-661 9 DNVRCOCWDS0  9636 QWEST CORPORATION 656      
303-662 A ENWDCOABDS0  9636 QWEST CORPORATION 656      
303-663 A CSRKCONMDS0  9636 QWEST CORPORATION 656      
303-664 A DNVRCOCWDS0  9636 QWEST CORPORATION 656      
303-665 A DNVRCOCWDS0  9636 QWEST CORPORATION 656      
303-666 A DNVRCOCWDS0  9636 QWEST CORPORATION 656      
303-667 A DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
303-668 A DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
303-669 A DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
303-670 A EVRGCOMADS0  9636 QWEST CORPORATION 656      
303-671 A DNVRCOSLDS0  9636 QWEST CORPORATION 656      
303-672 A DNVRCOCPDS0  9636 QWEST CORPORATION 656      
303-673 A DNVRCOCWDS0  9636 QWEST CORPORATION 656      

<< 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 >>

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.