Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 617 [Rate centres in NPA 617] [Dial plan for NPA 617]

NXX: 670

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
617-670 A Boston MA STHMMAGBGT0  7619 RCN TELECOM SERVICES, INC. - MA 128      
617-670 0 Boston MA   7619 RCN TELECOM SERVICES, INC. - MA 128      
617-670 1 Boston MA   7619 RCN TELECOM SERVICES, INC. - MA 128      
617-670 2 Boston MA   7619 RCN TELECOM SERVICES, INC. - MA 128      
617-670 3 Boston MA   7619 RCN TELECOM SERVICES, INC. - MA 128      
617-670 4 Boston MA   7619 RCN TELECOM SERVICES, INC. - MA 128      
617-670 5 Boston MA   7619 RCN TELECOM SERVICES, INC. - MA 128      
617-670 6 Boston MA   7619 RCN TELECOM SERVICES, INC. - MA 128      
617-670 7 Boston MA   7619 RCN TELECOM SERVICES, INC. - MA 128      
617-670 8 Boston MA   829J PAETEC ITEL, LLC 128   2006-07-13   
617-670 9 Boston MA   7619 RCN TELECOM SERVICES, INC. - MA 128      

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

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