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
720-537 9 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-539 A DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
720-539 0 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-539 1 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-539 2 DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
720-539 3 DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
720-539 4 DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
720-539 5 DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
720-539 6 DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
720-539 7 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-539 8 DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
720-539 9 DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
720-540 A WMNSCOMADS0  9636 QWEST CORPORATION 656      
720-540 0 WMNSCOMADS0  9636 QWEST CORPORATION 656      
720-540 1 DNVRCOZJRS0  9636 QWEST CORPORATION 656      
720-540 2 DNVRCOZJRS0  9636 QWEST CORPORATION 656      
720-540 3 WMNSCOMADS0  9636 QWEST CORPORATION 656      
720-540 4 WMNSCOMADS0  9636 QWEST CORPORATION 656      
720-540 5 WMNSCOMADS0  9636 QWEST CORPORATION 656      
720-540 6 WMNSCOMADS0  9636 QWEST CORPORATION 656      
720-540 7 WMNSCOMADS0  9636 QWEST CORPORATION 656      
720-540 8 WMNSCOMADS0  9636 QWEST CORPORATION 656      
720-540 9 WMNSCOMADS0  9636 QWEST CORPORATION 656      
720-541 A AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-541 0 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-541 1 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-541 2 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-541 3 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-541 4 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-541 5 DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656      
720-541 6 DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656      
720-541 7 DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656      
720-541 8 DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656      
720-541 9 DNVRCOMAXGZ  078F BANDWIDTH.COM CLEC, LLC - CO 656      
720-542 A WMNSCOMADS0  9636 QWEST CORPORATION 656      
720-542 0 WMNSCOMADS0  9636 QWEST CORPORATION 656      
720-542 1 WMNSCOMADS0  9636 QWEST CORPORATION 656      
720-542 2 WMNSCOMADS0  9636 QWEST CORPORATION 656      
720-542 3 DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656      
720-542 4 WMNSCOMADS0  9636 QWEST CORPORATION 656      
720-542 5 WMNSCOMADS0  9636 QWEST CORPORATION 656      
720-542 6 DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
720-542 7 DNVTCOZIDS1  026D ONVOY, LLC - CO 656      
720-542 8 DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656      
720-542 9 DNVRCOMA39Z  318J COMCAST IP PHONE, LLC 656      
720-543 A DNVRCO26DS5  278F PEERLESS NETWORK OF COLORADO, LLC - CO 656      
720-543 0 DNVRCO26DS5  278F PEERLESS NETWORK OF COLORADO, LLC - CO 656      
720-543 1 DNVRCO26DS5  278F PEERLESS NETWORK OF COLORADO, LLC - CO 656      
720-543 2 DNVRCO26DS5  278F PEERLESS NETWORK OF COLORADO, LLC - CO 656      
720-543 3 DNVRCO26DS5  278F PEERLESS NETWORK OF COLORADO, LLC - CO 656      
720-543 4 DNVRCO26DS5  278F PEERLESS NETWORK OF COLORADO, LLC - CO 656      
720-543 5 DNVRCO26DS5  278F PEERLESS NETWORK OF COLORADO, LLC - CO 656      
720-543 6 DNVRCO26DS5  278F PEERLESS NETWORK OF COLORADO, LLC - CO 656      
720-543 7 DNVRCO26DS5  278F PEERLESS NETWORK OF COLORADO, LLC - CO 656      
720-543 8 DNVRCO26DS5  278F PEERLESS NETWORK OF COLORADO, LLC - CO 656      
720-543 9 DNVRCO26DS5  278F PEERLESS NETWORK OF COLORADO, LLC - CO 656      
720-544 A LKWDCOMADS0  9636 QWEST CORPORATION 656      
720-544 0 LKWDCOMADS0  9636 QWEST CORPORATION 656      
720-544 1 DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
720-544 2 LKWDCOMADS0  9636 QWEST CORPORATION 656      
720-544 3 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-544 4 LKWDCOMADS0  9636 QWEST CORPORATION 656      
720-544 5 LKWDCOMADS0  9636 QWEST CORPORATION 656      
720-544 6   829J PAETEC ITEL, LLC 656      
720-544 7 ENWDCO47DS4  320E YMAX COMMUNICATIONS CORP. - CO 656      
720-544 8 LKWDCOMADS0  9636 QWEST CORPORATION 656      
720-544 9 DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
720-545 A DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-545 0 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-545 1 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-545 2 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-545 3 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-545 4 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-545 5 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-545 6 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-545 7 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-545 8 AURRCO20AMD  6567 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 656      
720-545 9 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-546 A DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-546 0 DNVRCOII4MD  5562 METROPCS, INC. 656      
720-546 1 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-546 2 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-546 3 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-546 4 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-546 5 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-546 6 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-546 7 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-546 8 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-546 9 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-548 A DNVTCO56AMD  8465 GLOBAL CROSSING LOCAL SERVICES, INC. - CO 656      
720-548 0 DNVRCOMD4MD  6010 NEW CINGULAR WIRELESS PCS, LLC 656      
720-548 1 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-548 2 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-548 3 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-548 4 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-548 5 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-548 6 DNVTCO56DS8  6118 LEVEL 3 COMMUNICATIONS, LLC - CO 656      
720-548 7 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-548 8 DNVRCOII3MD  6529 T-MOBILE USA, INC. 656      
720-548 9 DNVTCO56AMD  8465 GLOBAL CROSSING LOCAL SERVICES, INC. - CO 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: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.