Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Sudbury, MA

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
978-917 8   073H TELNYX LLC 128   2017-04-28   
978-917 9   624H ONVOY SPECTRUM, LLC 128   2021-11-27   

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

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