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 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
720-281 8 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-281 9 DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656      
720-282 A AURSCOFWDS0  4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-282 0 DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
720-282 1 DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656      
720-282 2 AURSCOFWDS0  4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-282 3 DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656      
720-282 4   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
720-282 5   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
720-282 6   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
720-282 7   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
720-282 8 AURSCOFWDS0  4574 LEVEL 3 TELECOM OF COLORADO, LLC - CO 656      
720-282 9 DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656      
720-283 A LTTNCOMADS0  9636 QWEST CORPORATION 656      
720-284 A DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
720-284 0 DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
720-284 1 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-284 2 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-284 3 DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
720-284 4 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-284 5 DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
720-284 6 DNVRCO37DS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 656      
720-284 7 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-284 8 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-284 9 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-285 A ENWDCO47DS3  8980 XO COLORADO, LLC 656      
720-285 0 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-285 1 ENWDCO47DS3  8980 XO COLORADO, LLC 656      
720-285 2 ENWDCO47DS3  8980 XO COLORADO, LLC 656      
720-285 3 ENWDCO47DS3  8980 XO COLORADO, LLC 656      
720-285 4 ENWDCO47DS3  8980 XO COLORADO, LLC 656      
720-285 5 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-285 6 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-285 7 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-285 8 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-285 9 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-286 A DNVRCOMDDS1  7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-286 0   7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-286 1   7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-286 2   7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-286 3   7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-286 4   7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-286 5   7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-286 6   7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-286 7   7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-286 8   7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-286 9   7378 TELEPORT COMMUNICATIONS AMERICA, LLC - CO 656      
720-287 A DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656      
720-287 0 DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656      
720-287 1 DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656      
720-287 2 DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656      
720-287 3 DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656      
720-287 4 DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656      
720-287 5 DNVRCOETPS0  3467 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 656      
720-287 6 DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
720-287 7 DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
720-287 8 DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
720-287 9 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-288 A DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656      
720-288 0 DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656      
720-288 1 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-288 2 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-288 3 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-288 4 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-288 5 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-288 6 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-288 7 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-288 8 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-288 9 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-289 A DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
720-290 A DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-290 0 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-290 1 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-290 2 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-290 3 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-290 4 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-290 5 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-290 6 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-290 7 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-290 8 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-290 9 DNVRCOII0MD  6529 T-MOBILE USA, INC. 656      
720-291 A DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-291 0 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-291 1 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-291 2 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-291 3 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-291 4 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-291 5 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-291 6 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-291 7 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-291 8 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-291 9 DNVRCOII0MD  6529 T-MOBILE USA, INC. 656      
720-292 A DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
720-292 0 DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
720-292 1 DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
720-292 2 DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
720-292 3 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-292 4 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-292 5   829J PAETEC ITEL, LLC 656      
720-292 6 DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 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 >>

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.