Local Calling Guide

Area code/prefix search

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Chatham, MA

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
774-840 6   892D ONVOY, LLC - MA 128   2019-01-05   
774-840 7   508J CENTURYLINK COMMUNICATIONS, LLC 128   2014-04-25   
774-840 8   515J IP HORIZON LLC 128   2015-10-18   
774-840 9   268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 128   2016-03-18   

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

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