Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Clear Spring, MD

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
301-857 6 FRDRMDFRXKX  508J CENTURYLINK COMMUNICATIONS, LLC 240   2016-10-26   
301-857 7 HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240   2015-05-17   
301-857 8 HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240   2006-08-22   
301-857 9 HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240   2015-05-17   

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Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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