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: 583

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
617-583 A Cambridge MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
617-583 0 Cambridge MA CMBSMA01AMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2010-10-25   
617-583 1 Cambridge MA   829J PAETEC ITEL, LLC 128      
617-583 2 Cambridge MA CMBSMA01AMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2010-10-25   
617-583 3 Cambridge MA CMBSMA01AMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2010-10-25   
617-583 4 Cambridge MA CMBRMABEDS1  9102 VERIZON NEW ENGLAND INC. 128      
617-583 5 Cambridge MA   829J PAETEC ITEL, LLC 128      
617-583 6 Cambridge MA   829J PAETEC ITEL, LLC 128      
617-583 7 Cambridge MA   829J PAETEC ITEL, LLC 128   2008-12-18   
617-583 8 Cambridge MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
617-583 9 Cambridge MA   829J PAETEC ITEL, LLC 128   2008-12-18   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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