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: 556

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
508-556 A Worcester MA CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
508-556 0 Worcester MA   990E BANDWIDTH.COM CLEC, LLC - MA 128      
508-556 1 Worcester MA   990E BANDWIDTH.COM CLEC, LLC - MA 128      
508-556 2 Worcester MA   892D ONVOY, LLC - MA 128   2014-08-29   
508-556 3 Worcester MA   515J IP HORIZON LLC 128      
508-556 4 Worcester MA   990E BANDWIDTH.COM CLEC, LLC - MA 128      
508-556 5 Worcester MA   671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 128   2006-06-30   
508-556 6 Worcester MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2008-01-31   
508-556 7 Worcester MA   990E BANDWIDTH.COM CLEC, LLC - MA 128      
508-556 8 Worcester MA   515J IP HORIZON LLC 128      
508-556 9 Worcester MA   892D ONVOY, LLC - MA 128      

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

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