Local Calling Guide

Area code/prefix search

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NPA: 508 [Rate centres in NPA 508] [Dial plan for NPA 508]

NXX: 621

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
508-621 A Westboro MA WRCSMA02DS1  7135 TC SYSTEMS, INC. 128      
508-621 0 Westboro MA WRCSMA02DS1  7135 TC SYSTEMS, INC. 128      
508-621 1 Westboro MA WRCSMA02DS1  7135 TC SYSTEMS, INC. 128      
508-621 2 Westboro MA WRCSMA02DS1  7135 TC SYSTEMS, INC. 128      
508-621 3 Westboro MA WRCSMA02DS1  7135 TC SYSTEMS, INC. 128      
508-621 4 Westboro MA WRCSMA02DS1  7135 TC SYSTEMS, INC. 128      
508-621 5 Westboro MA WRCSMA02DS1  7135 TC SYSTEMS, INC. 128      
508-621 6 Westboro MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      
508-621 7 Westboro MA CMBRMAORDS0  7199 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA 128      
508-621 8 Westboro MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      
508-621 9 Westboro MA BSTPMALL5MD  508J CENTURYLINK COMMUNICATIONS, LLC 128      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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