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: 533

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
301-533 A Oakland MD OKLDMDOKDS0  9212 VERIZON MARYLAND, INC. 240      
301-533 0 Oakland MD   9212 VERIZON MARYLAND, INC. 240      
301-533 1 Oakland MD   9212 VERIZON MARYLAND, INC. 240      
301-533 2 Oakland MD   9212 VERIZON MARYLAND, INC. 240      
301-533 3 Oakland MD   9212 VERIZON MARYLAND, INC. 240      
301-533 4 Oakland MD   9212 VERIZON MARYLAND, INC. 240      
301-533 5 Oakland MD   2593 CORE COMMUNICATIONS, INC.- MD 240   2019-05-02   
301-533 6 Oakland MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 240   2008-01-18   
301-533 7 Oakland MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 240   2008-02-13   
301-533 8 Oakland MD   281E YMAX COMMUNICATIONS CORP. - MD 240   2009-03-16   
301-533 9 Oakland MD   145J TERRA NOVA TELECOM INC. 240   2025-12-17   

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

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