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: 737

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-737 A Watertown MA   516J TON80 COMMUNICATIONS LLC 128   2022-05-26   
857-737 7 Watertown MA   516J TON80 COMMUNICATIONS LLC 128   2022-05-26   
857-737 8 Watertown MA   892D ONVOY, LLC - MA 128   2022-05-27   

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

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