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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-227 8 Concord NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-227 9 Concord NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-228 A Concord NH CNCRNHSODS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-229 A Concord NH CNCRNHSODS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-229 0 Concord NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-229 1 Concord NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-229 2 Concord NH   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2007-07-09   
603-229 3 Concord NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-229 4 Concord NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-229 5 Concord NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-229 6 Concord NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-229 7 Concord NH   6290 UNITED STATES CELLULAR - NH 122      
603-229 8 Concord NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2015-07-24   
603-229 9 Concord NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122   2015-01-31   
603-230 A Concord NH CNCRNHSODS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-230 0 Concord NH   6386 BELL ATLANTIC MOBILE, INC 122   2015-07-01   
603-230 1 Concord NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-230 2 Concord NH   829J PAETEC ITEL, LLC 122   2003-09-08   
603-230 3 Concord NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-230 4 Concord NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-230 5 Concord NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-230 6 Concord NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-230 7 Concord NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-230 8 Concord NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122   2006-08-01   
603-230 9 Concord NH   5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-231 A Derry NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-231 0 Derry NH   5562 METROPCS, INC. 122      
603-231 1 Derry NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-231 2 Derry NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-231 3 Derry NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-231 4 Derry NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-231 5 Derry NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-231 6 Derry NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-231 7 Derry NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-231 8 Derry NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-231 9 Derry NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-232 A Manchester NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122      
603-232 0 Manchester NH   318J COMCAST IP PHONE, LLC 122   2003-10-18   
603-232 1 Manchester NH   318J COMCAST IP PHONE, LLC 122      
603-232 2 Manchester NH   318J COMCAST IP PHONE, LLC 122      
603-232 3 Manchester NH   318J COMCAST IP PHONE, LLC 122      
603-232 4 Manchester NH   318J COMCAST IP PHONE, LLC 122   2003-03-02   
603-232 5 Manchester NH   318J COMCAST IP PHONE, LLC 122      
603-232 6 Manchester NH   318J COMCAST IP PHONE, LLC 122   2002-07-24   
603-232 7 Manchester NH   318J COMCAST IP PHONE, LLC 122   2002-07-24   
603-232 8 Manchester NH   829J PAETEC ITEL, LLC 122   2003-09-08   
603-232 9 Manchester NH   829J PAETEC ITEL, LLC 122   2003-09-08   
603-233 A Nashua NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-233 0 Nashua NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-233 1 Nashua NH   6889 OMNIPOINT MIAMI E LICENSE, LLC 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 >>

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.