Local Calling Guide

Area code/prefix search

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

NXX: 403

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
603-403 A Rochester NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122      
603-403 0 Rochester NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2019-09-20   
603-403 1 Rochester NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2018-09-14   
603-403 2 Rochester NH MNCHNHACAMD  6386 BELL ATLANTIC MOBILE, INC 122   2020-11-19   
603-403 3 Rochester NH MNCHNHCOX9Z  637E ONVOY, LLC - NH 122   2022-05-20   
603-403 4 Rochester NH MNCHNHIE6MD  318J COMCAST IP PHONE, LLC 122   2019-11-19   
603-403 5 Rochester NH MNCHNHCOX9Z  637E ONVOY, LLC - NH 122   2021-08-02   
603-403 6 Rochester NH DOVRNHTHXEX  8299 TELEPORT COMMUNICATIONS AMERICA, LLC - NH 122   2019-05-16   
603-403 7 Rochester NH MNCHNHBODS0  927H PEERLESS NETWORK OF NEW HAMPSHIRE, LLC - NH 122   2021-07-16   
603-403 8 Rochester NH ROCHNHWE4MD  314C IDT AMERICA, CORP. - NH 122   2019-05-13   
603-403 9 Rochester NH MNCHNHBODS0  927H PEERLESS NETWORK OF NEW HAMPSHIRE, LLC - NH 122   2021-03-03   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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