Local Calling Guide

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

NXX: 250

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
617-250 A Cambridge MA CMBRMA01DS5  7135 TC SYSTEMS, INC. 128      
617-250 0 Cambridge MA   7135 TC SYSTEMS, INC. 128      
617-250 1 Cambridge MA   7135 TC SYSTEMS, INC. 128      
617-250 2 Cambridge MA   7135 TC SYSTEMS, INC. 128      
617-250 3 Cambridge MA   7135 TC SYSTEMS, INC. 128      
617-250 4 Cambridge MA   7135 TC SYSTEMS, INC. 128      
617-250 5 Cambridge MA   7135 TC SYSTEMS, INC. 128      
617-250 6 Cambridge MA   7135 TC SYSTEMS, INC. 128      
617-250 7 Cambridge MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2005-03-08   
617-250 8 Cambridge MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2008-02-01   
617-250 9 Cambridge MA   7135 TC SYSTEMS, INC. 128      

Last updated: Sun, 04 Apr 2021 19:28:27 UTC

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