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 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-384 0 Goffstown NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2018-10-26   
603-384 1 Goffstown NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122      
603-384 2 Goffstown NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122      
603-384 3 Goffstown NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2004-09-04   
603-384 4 Goffstown NH MNCHNHCOX1Y  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2002-11-15   
603-384 5 Goffstown NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122      
603-384 6 Goffstown NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2022-12-15   
603-384 8 Goffstown NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2023-12-15   
603-384 9 Goffstown NH MNCHNHCO22Z  073H TELNYX LLC 122   2023-02-03   
603-385 A Manchester NH MNCHNHCODS2  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-386 A Salem NH   829J PAETEC ITEL, LLC 122   2025-04-30   
603-386 0 Salem NH   829J PAETEC ITEL, LLC 122      
603-386 1 Salem NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2018-09-20   
603-386 2 Salem NH   829J PAETEC ITEL, LLC 122      
603-386 3 Salem NH   829J PAETEC ITEL, LLC 122      
603-386 5 Salem NH   829J PAETEC ITEL, LLC 122      
603-386 6 Salem NH   829J PAETEC ITEL, LLC 122      
603-386 7 Salem NH   829J PAETEC ITEL, LLC 122      
603-386 8 Salem NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2018-11-07   
603-386 9 Salem NH   829J PAETEC ITEL, LLC 122      
603-387 A Laconia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-388 A Colebrook NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-388 0 Colebrook NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-388 1 Colebrook NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-388 2 Colebrook NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-388 3 Colebrook NH   145J TERRA NOVA TELECOM INC. 122   2026-03-30   
603-388 4 Colebrook NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-389 A Durham NH   829J PAETEC ITEL, LLC 122   2025-04-30   
603-389 0 Durham NH   829J PAETEC ITEL, LLC 122   2001-03-26   
603-389 1 Durham NH   829J PAETEC ITEL, LLC 122   2005-02-18   
603-389 2 Durham NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122   2007-07-23   
603-389 3 Durham NH PTMONH073MD  9827 OTEL TELEKOM, INC. - NH 122   2006-08-22   
603-389 6 Durham NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2010-09-27   
603-389 7 Durham NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2015-11-15   
603-389 8 Durham NH ROCHNHWE4MD  314C IDT AMERICA, CORP. - NH 122   2008-04-18   
603-389 9 Durham NH   829J PAETEC ITEL, LLC 122   2000-09-01   
603-390 A Jefferson NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      
603-390 2 Jefferson NH   145J TERRA NOVA TELECOM INC. 122   2023-11-11   
603-390 6 Jefferson NH MNCHNHAC7MD  145J TERRA NOVA TELECOM INC. 122   2024-10-11   
603-390 9 Jefferson NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      
603-391 A Manchester NH MNCHNHCOX1Y  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122      
603-391 0 Manchester NH MNCHNHCOX1Y  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122      
603-391 1 Manchester NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2004-09-29   
603-391 2 Manchester NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2005-03-04   
603-391 3 Manchester NH MNCHNHCOX1Y  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2004-01-18   
603-391 4 Manchester NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2005-05-02   
603-391 5 Manchester NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2005-06-02   
603-391 6 Manchester NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2005-08-01   
603-391 7 Manchester NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2005-08-01   
603-391 8 Manchester NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2005-01-02   
603-391 9 Manchester NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2005-01-02   
603-392 A Winchester NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122      
603-392 0 Winchester NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2007-01-29   
603-392 1 Winchester NH MNCHNHCO23Z  073H TELNYX LLC 122   2024-07-04   
603-392 2 Winchester NH MNCHNHCO42Z  793K TWC IP ENABLED SERVICES, LLC 122   2012-10-02   
603-392 7 Winchester NH MNCHNHCOXCZ  996E BANDWIDTH.COM CLEC, LLC - NH 122   2016-04-08   
603-393 A Laconia NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-393 0 Laconia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2008-09-01   
603-393 1 Laconia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2009-12-03   
603-393 2 Laconia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2008-12-04   
603-393 3 Laconia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2008-06-05   
603-393 4 Laconia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2009-02-02   
603-393 5 Laconia NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-393 6 Laconia NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-393 7 Laconia NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-393 8 Laconia NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-393 9 Laconia NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-394 A South Hampton NH EXTRNHCEDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-394 0 South Hampton NH EXTRNHCEDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-394 1 South Hampton NH   829J PAETEC ITEL, LLC 122   2005-02-28   
603-394 2 South Hampton NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2002-08-05   
603-394 3 South Hampton NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2015-05-04   
603-394 4 South Hampton NH   145J TERRA NOVA TELECOM INC. 122   2021-05-28   
603-394 5 South Hampton NH MNCHNHCOCM1  5562 METROPCS, INC. 122   2005-06-24   
603-394 6 South Hampton NH MNCHNHCOCM1  5562 METROPCS, INC. 122   2006-02-19   
603-394 7 South Hampton NH EXTRNHCEDS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-395 A Exeter NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      
603-395 0 Exeter NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2015-03-01   
603-395 1 Exeter NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2015-05-12   
603-395 2 Exeter NH   829J PAETEC ITEL, LLC 122   2001-09-10   
603-395 3 Exeter NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2015-08-12   
603-395 4 Exeter NH   6386 BELL ATLANTIC MOBILE, INC 122   2025-05-16   
603-395 5 Exeter NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2013-12-10   
603-395 6 Exeter NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2013-07-22   
603-395 7 Exeter NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2016-01-17   
603-395 8 Exeter NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122   2015-11-17   
603-395 9 Exeter NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      
603-396 A Merrimack NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-396 0 Merrimack NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-396 1 Merrimack NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-396 2 Merrimack NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-396 3 Merrimack NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-396 4 Merrimack NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-396 5 Merrimack NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-396 6 Merrimack NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-396 7 Merrimack NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-396 8 Merrimack NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-396 9 Merrimack NH MNCHNHCOCM1  6889 OMNIPOINT MIAMI E LICENSE, LLC 122      
603-397 A Durham NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122      
603-397 0 Durham NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122   2005-09-10   

<< 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 >>

Last updated: Sat, 21 Mar 2026 23:53:39 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.