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: 603 [Rate centres in NPA 603] [Dial plan for NPA 603]

<< 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 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-608 3 Northwood NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2004-09-02   
603-608 5 Northwood NH MNCHNHCOCM1  5562 METROPCS, INC. 122   2003-10-07   
603-608 6 Northwood NH MNCHNHCOCM1  5562 METROPCS, INC. 122      
603-608 7 Northwood NH MNCHNHCOCM1  5562 METROPCS, INC. 122      
603-608 8 Northwood NH MNCHNHCOCM1  5562 METROPCS, INC. 122      
603-608 9 Northwood NH MNCHNHCOCM1  5562 METROPCS, INC. 122      
603-609 A Dover NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122      
603-609 0 Dover NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122      
603-609 1 Dover NH MNCHNHCOXMX  4206 PAETEC COMMUNICATIONS, INC. - NH 122   2004-11-08   
603-609 2 Dover NH   145J TERRA NOVA TELECOM INC. 122   2021-05-27   
603-609 3 Dover NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2020-12-05   
603-609 5 Dover NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2008-11-18   
603-609 6 Dover NH PTMONH07DS1  8468 FREEDOM RING COMMUNICATIONS, LLC 122   2008-06-17   
603-609 7 Dover NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2010-10-02   
603-609 8 Dover NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2012-02-20   
603-609 9 Dover NH MNCHNHBODS0  927H PEERLESS NETWORK OF NEW HAMPSHIRE, LLC - NH 122   2020-10-30   
603-610 A Portsmouth NH DOVRNHTH8MD  2527 CHOICE ONE OF NEW HAMPSHIRE, INC. 122      
603-610 0 Portsmouth NH DOVRNHTH8MD  2527 CHOICE ONE OF NEW HAMPSHIRE, INC. 122      
603-610 1 Portsmouth NH DOVRNHTH8MD  2527 CHOICE ONE OF NEW HAMPSHIRE, INC. 122      
603-610 2 Portsmouth NH DOVRNHTH8MD  2527 CHOICE ONE OF NEW HAMPSHIRE, INC. 122      
603-610 3 Portsmouth NH PTMONH07DS1  8468 FREEDOM RING COMMUNICATIONS, LLC 122   2012-04-25   
603-610 4 Portsmouth NH PTMONH07DS1  8468 FREEDOM RING COMMUNICATIONS, LLC 122   2001-12-09   
603-610 5 Portsmouth NH PTMONH07DS1  8468 FREEDOM RING COMMUNICATIONS, LLC 122   2001-12-09   
603-610 6 Portsmouth NH DOVRNHTH8MD  2527 CHOICE ONE OF NEW HAMPSHIRE, INC. 122      
603-610 7 Portsmouth NH PTMONH07DS1  8468 FREEDOM RING COMMUNICATIONS, LLC 122   2004-04-19   
603-610 8 Portsmouth NH PTMONH07DS1  8468 FREEDOM RING COMMUNICATIONS, LLC 122   2004-04-19   
603-610 9 Portsmouth NH DOVRNHTH8MD  2527 CHOICE ONE OF NEW HAMPSHIRE, INC. 122      
603-612 A Plaistow NH NASHNH08AMD  4053 CONVERSENT COMMUNICATIONS OF NEW HAMPSHIRE, LLC 122      
603-612 0 Plaistow NH MNCHNHCOX9Y  2527 CHOICE ONE OF NEW HAMPSHIRE, INC. 122   2000-05-24   
603-612 1 Plaistow NH MNCHNHCOX9Y  2698 CTC COMMUNICATIONS CORP. - NH 122   2002-07-24   
603-612 4 Plaistow NH PTMONH07DS1  9827 OTEL TELEKOM, INC. - NH 122   2002-09-20   
603-612 6 Plaistow NH NASHNH08AMD  4053 CONVERSENT COMMUNICATIONS OF NEW HAMPSHIRE, LLC 122      
603-613 A Colebrook NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      
603-613 3 Colebrook NH MNCHNHAC7MD  145J TERRA NOVA TELECOM INC. 122   2023-11-11   
603-613 4 Colebrook NH PTMONH07DS1  9827 OTEL TELEKOM, INC. - NH 122   2002-09-10   
603-613 9 Colebrook NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      
603-614 A West Chesterfield NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122      
603-614 2 West Chesterfield NH MNCHNHAC7MD  145J TERRA NOVA TELECOM INC. 122   2023-08-09   
603-614 3 West Chesterfield NH MNCHNHCOX9Y  2698 CTC COMMUNICATIONS CORP. - NH 122   2006-08-21   
603-614 4 West Chesterfield NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122      
603-614 5 West Chesterfield NH MNCHNHCOX9Z  637E ONVOY, LLC - NH 122   2023-07-06   
603-614 6 West Chesterfield NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122   2018-08-12   
603-614 8 West Chesterfield NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2007-01-12   
603-615 A Manchester NH MNCHNHCODS2  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-616 A Littleton NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-616 1 Littleton NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-616 2 Littleton NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-616 3 Littleton NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-616 4 Littleton NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-616 5 Littleton NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      

<< 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 >>

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.