Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 857 [Rate centres in NPA 857] [Dial plan for NPA 857]

NXX: 475

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-475 A Chelsea MA CMBRMABEX6X  566J RADIANTIQ LLC 128   2021-06-03   
857-475 0 Chelsea MA CMBRMABENMD  624H ONVOY SPECTRUM, LLC 128   2021-11-27   
857-475 1 Chelsea MA CMBRMABENMD  624H ONVOY SPECTRUM, LLC 128   2021-11-27   
857-475 7 Chelsea MA CMBRMABEX6X  566J RADIANTIQ LLC 128   2021-06-03   

Last updated: Wed, 01 Jun 2022 03:09:23 UTC

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