Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 301 [Rate centres in NPA 301] [Dial plan for NPA 301]

NXX: 857

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
301-857 A Clear Spring MD HGTWMD53DS0  2593 CORE COMMUNICATIONS, INC.- MD 240      
301-857 0 Clear Spring MD FRDRMDFRPS0  2593 CORE COMMUNICATIONS, INC.- MD 240   2002-09-10   
301-857 1 Clear Spring MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240   2012-10-06   
301-857 2 Clear Spring MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240   2014-10-20   
301-857 3 Clear Spring MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240   2015-10-29   
301-857 4 Clear Spring MD CMLDMDCMEMD  876D ONVOY, LLC - MD 240   2016-09-12   
301-857 5 Clear Spring MD CMLDMDCMEMD  876D ONVOY, LLC - MD 240   2016-09-12   
301-857 6 Clear Spring MD FRDRMDFRXKX  508J CENTURYLINK COMMUNICATIONS, LLC 240   2016-10-26   
301-857 7 Clear Spring MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240   2015-05-17   
301-857 8 Clear Spring MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240   2006-08-22   
301-857 9 Clear Spring MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240   2015-05-17   

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

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