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.

NPA: 657 [Rate centres in NPA 657] [Dial plan for NPA 657]

<< 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 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
657-667 0 Garden Grove CA SHOKCA022MD  576C TIME WARNER CBL INFO SVCS (CA) DBA TIME WARNER CAB 730   2013-08-22   
657-667 1 Garden Grove CA LSANCAJWDS9  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2013-08-23   
657-667 2 Garden Grove CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2013-08-23   
657-667 3 Garden Grove CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2013-08-23   
657-667 4 Garden Grove CA LSANCA039MD  981E BANDWIDTH.COM CLEC, LLC - CA 730   2013-08-23   
657-667 5 Garden Grove CA LSANCAJW2MD  508J CENTURYLINK COMMUNICATIONS, LLC 730   2013-11-30   
657-667 6 Garden Grove CA LSANCA54DS7  8826 LEVEL 3 COMMUNICATIONS, LLC - CA 730   2013-12-20   
657-667 7 Garden Grove CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2013-09-21   
657-667 8 Garden Grove CA LSANCAJWDS9  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2013-08-23   
657-667 9 Garden Grove CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2014-09-04   
657-668 A Anaheim CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730      
657-668 0 Anaheim CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2023-03-27   
657-668 1 Anaheim CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2023-03-27   
657-668 2 Anaheim CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2023-03-27   
657-668 3 Anaheim CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2023-03-27   
657-668 4 Anaheim CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2023-03-27   
657-668 5 Anaheim CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2023-03-27   
657-668 6 Anaheim CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2023-03-27   
657-668 7 Anaheim CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2023-03-27   
657-668 8 Anaheim CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2023-03-27   
657-668 9 Anaheim CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2023-03-27   
657-669 A Orange CA ANHMCACLCM6  6010 NEW CINGULAR WIRELESS PCS, LLC 730      
657-669 0 Orange CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2023-08-10   
657-669 1 Orange CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2023-08-10   
657-669 2 Orange CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2023-08-10   
657-669 3 Orange CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2023-08-10   
657-669 4 Orange CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2023-08-10   
657-669 5 Orange CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2023-08-10   
657-669 6 Orange CA LSANCARCD3S  649C ONVOY, LLC - CA 730   2023-08-10   
657-669 7 Orange CA ANHMCACLCM6  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2023-05-08   
657-669 8 Orange CA ANHMCACLCM6  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2023-05-08   
657-669 9 Orange CA ANHMCACLCM6  6010 NEW CINGULAR WIRELESS PCS, LLC 730   2023-05-08   
657-670 A Westminster CA LNBHCAXPXBY  649C ONVOY, LLC - CA 730   2024-01-23   
657-670 0 Westminster CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2023-10-16   
657-670 1 Westminster CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2023-11-12   
657-670 2 Westminster CA LNBHCAXPXBY  649C ONVOY, LLC - CA 730   2023-10-16   
657-670 3 Westminster CA LNBHCAXPXBY  649C ONVOY, LLC - CA 730   2023-06-11   
657-670 4 Westminster CA LNBHCAXPXBY  649C ONVOY, LLC - CA 730   2023-06-11   
657-670 5 Westminster CA LNBHCAXPXBY  649C ONVOY, LLC - CA 730   2023-10-16   
657-670 6 Westminster CA LNBHCAXPXBY  649C ONVOY, LLC - CA 730   2023-10-16   
657-670 7 Westminster CA TRNECAGBGT3  6529 T-MOBILE USA, INC. 730   2023-10-11   
657-670 8 Westminster CA BLTNCAADGMD  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 730   2023-09-10   
657-670 9 Westminster CA LSANCAJWDS9  373F PEERLESS NETWORK OF CALIFORNIA, LLC - CA 730   2023-07-13   
657-671 A Brea CA LSANCAJW7MD  939H COMMIO, LLC 730      
657-671 0 Brea CA LSANCAJW7MD  939H COMMIO, LLC 730   2023-10-12   
657-671 1 Brea CA LSANCAJW7MD  939H COMMIO, LLC 730   2023-10-12   
657-671 2 Brea CA LSANCAJW7MD  939H COMMIO, LLC 730   2023-10-12   
657-671 3 Brea CA LSANCAJW7MD  939H COMMIO, LLC 730   2023-10-12   
657-671 4 Brea CA LSANCAJW7MD  939H COMMIO, LLC 730   2023-10-12   
657-671 5 Brea CA TRNECAGB7MD  6529 T-MOBILE USA, INC. 730   2023-10-20   

<< 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 >>

Last updated: Sun, 17 May 2026 03:26:51 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.