Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 508 [Rate centres in NPA 508] [Dial plan for NPA 508]

NXX: 593

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
508-593 A Chatham MA CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
508-593 0 Chatham MA   892D ONVOY, LLC - MA 128   2019-07-01   
508-593 1 Chatham MA   892D ONVOY, LLC - MA 128   2019-07-01   
508-593 2 Chatham MA   624H ONVOY SPECTRUM, LLC 128   2021-04-08   
508-593 3 Chatham MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2005-05-16   
508-593 4 Chatham MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
508-593 5 Chatham MA   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2017-03-06   
508-593 7 Chatham MA   892D ONVOY, LLC - MA 128   2016-04-11   
508-593 8 Chatham MA   892D ONVOY, LLC - MA 128   2016-04-11   
508-593 9 Chatham MA   892D ONVOY, LLC - MA 128   2021-03-11   

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

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