Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

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 MNRVMDMOXFX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240   2011-03-10   
301-338 1 Cumberland MD MNRVMDMOXFX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240   2007-12-06   
301-338 2 Cumberland MD CMLDMDCH0MD  228C IDT AMERICA, CORP. - MD 240   2006-03-25   
301-338 3 Cumberland MD MNRVMDMOXFX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240   2011-03-10   
301-338 4 Cumberland MD FRDRMDFRKMD  5562 METROPCS, INC. 240   2011-08-25   
301-338 5 Cumberland MD FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240   2011-08-25   
301-338 6 Cumberland MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240   2014-05-30   
301-338 7 Cumberland MD FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240   2011-11-11   
301-338 8 Cumberland MD HGTWMDHGDMD  071F BANDWIDTH.COM CLEC, LLC - MD 240   2012-02-19   
301-338 9 Cumberland MD CMLDMDCM2MD  836G SHENTEL COMMUNICATIONS, LLC. - MD 240   2014-06-02   

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.