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]

Block: A

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-609 A Dover NH DRRYNHBC1MD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 122      
603-610 A Portsmouth NH   829J PAETEC ITEL, LLC 122   2025-04-30   
603-612 A Plaistow NH   829J PAETEC ITEL, LLC 122   2025-04-30   
603-613 A 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      
603-615 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      
603-617 A Dover NH   829J PAETEC ITEL, LLC 122   2025-04-30   
603-618 A Pike NH MNCHNHCOX8Z  4017 LEVEL 3 COMMUNICATIONS, LLC - NH 122      
603-619 A Laconia NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122      
603-620 A Merrimack NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-621 A Manchester NH MNCHNHCODS2  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-622 A Manchester NH MNCHNHCODS2  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-623 A Manchester NH MNCHNHCODS2  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-624 A Manchester NH MNCHNHCODS2  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-625 A Manchester NH MNCHNHCODS2  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-626 A Manchester NH MNCHNHCODS2  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-627 A Manchester NH MNCHNHCODS2  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-628 A Manchester NH MNCHNHCODS2  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-629 A Manchester NH MNCHNHCODS2  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-630 A Laconia NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-631 A Lancaster NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-632 A Enfield NH ENFDNHNMRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-633 A Milford NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122      
603-634 A Manchester NH MNCHNHCODS2  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-635 A Pelham NH PLHMNHBRDS0  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-636 A Groveton NH GVTNNHSTRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-637 A Bedford NH MNCHNHACDS0  7778 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NH 122      
603-638 A Monroe NH BARNVTCHRS2  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-639 A Manchester NH MNCHNHCODS2  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-640 A Hanover NH HNVRNHSCDS0  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-641 A Manchester NH MNCHNHCODS2  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-642 A Kingston NH KGTNNHBADS0  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-643 A Hanover NH HNVRNHSCDS0  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-644 A Manchester NH MNCHNHCODS2  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-645 A Manchester NH MNCHNHCODS2  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-646 A Hanover NH HNVRNHSCDS0  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-647 A Manchester NH MNCHNHCODS2  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-648 A Salisbury NH SLBRNHXARP0  0045 KEARSARGE TEL. CO. 122      
603-649 A Jaffrey NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122      
603-650 A Hanover NH LBNNNHMSRSA  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-651 A Center Ossipee NH MNCHNHCOX4Z  6290 UNITED STATES CELLULAR - NH 122      
603-652 A Milton NH MLTNNHSIRS1  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-653 A Hanover NH HNVRNHSCDS0  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-654 A Wilton NH WLTONHXARP0  0050 WILTON TEL. CO. 122      
603-655 A Manchester NH MNCHNHCODS2  5113 CONSOLIDATED COMM OF NO. NEW ENGLAND-NH 122      
603-656 A Manchester NH MNCHNHCOPS0  383J CONSOLIDATED COMM ENTERPRISE SERVICES INC 122      
603-657 A Manchester NH   829J PAETEC ITEL, LLC 122   2025-04-30   
603-658 A Exeter NH PTMONH073MD  8468 FREEDOM RING COMMUNICATIONS, LLC 122      
603-659 A Newmarket NH NWMRNHGEDS0  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 >>

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.