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
603-570 6 Portsmouth NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122   2012-03-30   
603-570 7 Portsmouth NH PTMONH07DS1  8468 FREEDOM RING COMMUNICATIONS, LLC 122   2007-06-13   
603-570 8 Portsmouth NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2018-01-10   
603-570 9 Portsmouth NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      
603-571 A Derry NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2024-01-05   
603-571 0 Derry NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122      
603-571 1 Derry NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122      
603-571 2 Derry NH   145J TERRA NOVA TELECOM INC. 122   2024-02-02   
603-571 4 Derry NH MNCHNHCO23Z  073H TELNYX LLC 122   2024-01-15   
603-571 5 Derry NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122      
603-571 7 Derry NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122      
603-571 8 Derry NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122      
603-572 A Nashua NH NASHNHWPDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122     2024-06-02 
603-573 A Concord NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      
603-573 0 Concord NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2014-09-01   
603-573 1 Concord NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2013-10-01   
603-573 2 Concord NH CNCRNHSODS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122   2012-12-12   
603-573 3 Concord NH MNCHNHCO37Z  7421 AT&T - LOCAL 122   2000-12-15   
603-573 4 Concord NH MNCHNHCO37Z  7421 AT&T - LOCAL 122   2002-09-09   
603-573 5 Concord NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2007-07-09   
603-573 6 Concord NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2013-01-31   
603-573 7 Concord NH CNCRNHSODS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122   2012-12-12   
603-573 8 Concord NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2017-09-19   
603-573 9 Concord NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      
603-574 A Alstead NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122      
603-574 0 Alstead NH MNCHNHAC3MD  939H COMMIO, LLC 122   2022-11-05   
603-574 4 Alstead NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122      
603-575 A Littleton NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      
603-575 0 Littleton NH DOVRNHTHXEX  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2019-05-17   
603-575 1 Littleton NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2019-07-08   
603-575 4 Littleton NH MNCHNHAC7MD  145J TERRA NOVA TELECOM INC. 122   2023-04-27   
603-575 5 Littleton NH MNCHNHCOXPZ  853C TIME WARNER CABLE INFORMATION SVCS (NEW HAMPSHIRE) 122   2012-10-02   
603-575 6 Littleton NH MNCHNHCOXAZ  4206 PAETEC COMMUNICATIONS, INC. - NH 122   2013-10-21   
603-575 9 Littleton NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      
603-576 A Orford NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122      
603-576 2 Orford NH   145J TERRA NOVA TELECOM INC. 122   2021-12-12   
603-576 4 Orford NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122      
603-577 A Nashua NH NASHNHWPDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-577 0 Nashua NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2015-05-01   
603-577 1 Nashua NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2006-12-20   
603-577 2 Nashua NH NASHNHWPDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-577 3 Nashua NH NASHNHWPDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-577 4 Nashua NH NASHNHWPDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-577 5 Nashua NH NASHNHWPDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-577 6 Nashua NH NASHNHWPDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-577 7 Nashua NH NASHNHWPDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-577 8 Nashua NH NASHNHWPDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-577 9 Nashua NH NASHNHWPDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-578 A Nashua NH NASHNHWPDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-579 A Nashua NH NASHNHWPDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-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: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.