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: 500

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
617-500 A Cambridge MA CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
617-500 0 Cambridge MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2004-10-19   
617-500 1 Cambridge MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2005-03-04   
617-500 2 Cambridge MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2005-02-25   
617-500 3 Cambridge MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2007-05-23   
617-500 4 Cambridge MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
617-500 5 Cambridge MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2007-10-25   
617-500 6 Cambridge MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2005-03-04   
617-500 7 Cambridge MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2004-05-16   
617-500 8 Cambridge MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2005-03-04   
617-500 9 Cambridge MA   4536 XO MASSACHUSETTS, INC. 128   2008-09-26   

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

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