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: 418

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
301-418 A Frederick MD FRDRMDFRDS0  9212 VERIZON MARYLAND, INC. 240      
301-418 0 Frederick MD   5562 METROPCS, INC. 240   2003-10-11   
301-418 1 Frederick MD   5562 METROPCS, INC. 240   2003-10-11   
301-418 2 Frederick MD   5562 METROPCS, INC. 240   2003-10-11   
301-418 3 Frederick MD   5562 METROPCS, INC. 240   2004-01-31   
301-418 4 Frederick MD   5562 METROPCS, INC. 240   2004-01-31   
301-418 5 Frederick MD   5562 METROPCS, INC. 240   2004-06-10   
301-418 6 Frederick MD   071F BANDWIDTH.COM CLEC, LLC - MD 240   2004-04-07   
301-418 7 Frederick MD   9212 VERIZON MARYLAND, INC. 240   2004-08-23   
301-418 8 Frederick MD   5562 METROPCS, INC. 240   2004-09-13   
301-418 9 Frederick MD   9212 VERIZON MARYLAND, INC. 240   2003-01-11   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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