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: 298

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-298 A Cambridge MA CMBRMABENMD  624H ONVOY SPECTRUM, LLC 128      
857-298 0 Cambridge MA CMBRMABENMD  624H ONVOY SPECTRUM, LLC 128   2017-11-20   
857-298 1 Cambridge MA CMBRMABENMD  624H ONVOY SPECTRUM, LLC 128   2020-07-03   
857-298 2 Cambridge MA CMBRMABENMD  624H ONVOY SPECTRUM, LLC 128   2020-06-05   
857-298 3 Cambridge MA CMBRMABENMD  624H ONVOY SPECTRUM, LLC 128   2020-06-05   
857-298 4 Cambridge MA CMBRMABENMD  624H ONVOY SPECTRUM, LLC 128   2020-06-05   
857-298 5 Cambridge MA CMBRMABENMD  624H ONVOY SPECTRUM, LLC 128   2020-06-05   
857-298 6 Cambridge MA CMBRMABENMD  624H ONVOY SPECTRUM, LLC 128   2020-07-03   
857-298 7 Cambridge MA CMBRMABENMD  624H ONVOY SPECTRUM, LLC 128   2020-07-03   
857-298 8 Cambridge MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2019-10-01   
857-298 9 Cambridge MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128   2019-10-01   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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