Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 401 [Rate centres in NPA 401] [Dial plan for NPA 401]

NXX: 398

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
401-398 A Greenwich RI PRVDRIWAHMD  318J COMCAST IP PHONE, LLC 130      
401-398 0 Greenwich RI   318J COMCAST IP PHONE, LLC 130      
401-398 1 Greenwich RI   318J COMCAST IP PHONE, LLC 130   2003-04-14   
401-398 2 Greenwich RI   318J COMCAST IP PHONE, LLC 130   2004-02-23   
401-398 3 Greenwich RI   624H ONVOY SPECTRUM, LLC 130   2021-12-09   
401-398 4 Greenwich RI   977E ONVOY, LLC - RI 130   2023-08-09   
401-398 5 Greenwich RI   624H ONVOY SPECTRUM, LLC 130   2021-12-09   
401-398 6 Greenwich RI   977E ONVOY, LLC - RI 130   2023-08-09   
401-398 7 Greenwich RI   318J COMCAST IP PHONE, LLC 130   2004-09-05   
401-398 8 Greenwich RI   318J COMCAST IP PHONE, LLC 130   2006-08-29   
401-398 9 Greenwich RI   6889 OMNIPOINT MIAMI E LICENSE, LLC 130   2021-11-01   

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

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