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: 338

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
301-338 A Cumberland MD CMLDMDCH0MD  228C IDT AMERICA, CORP. - MD 240      
301-338 0 Cumberland MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240   2011-03-10   
301-338 1 Cumberland MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240   2007-12-06   
301-338 2 Cumberland MD   228C IDT AMERICA, CORP. - MD 240   2006-03-25   
301-338 3 Cumberland MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240   2011-03-10   
301-338 4 Cumberland MD   5562 METROPCS, INC. 240   2011-08-25   
301-338 5 Cumberland MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240   2011-08-25   
301-338 6 Cumberland MD   071F BANDWIDTH.COM CLEC, LLC - MD 240   2014-05-30   
301-338 7 Cumberland MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240   2011-11-11   
301-338 8 Cumberland MD   071F BANDWIDTH.COM CLEC, LLC - MD 240   2012-02-19   
301-338 9 Cumberland MD   836G SHENTEL COMMUNICATIONS, LLC. - MD 240   2014-06-02   

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

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