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: 387

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
301-387 A Oakland MD THVLMDTVRS0  9212 VERIZON MARYLAND, INC. 240      
301-387 0 Oakland MD   9212 VERIZON MARYLAND, INC. 240      
301-387 1 Oakland MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 240   2024-09-13   
301-387 2 Oakland MD   9212 VERIZON MARYLAND, INC. 240      
301-387 3 Oakland MD   9212 VERIZON MARYLAND, INC. 240      
301-387 4 Oakland MD   9212 VERIZON MARYLAND, INC. 240      
301-387 5 Oakland MD   9212 VERIZON MARYLAND, INC. 240      
301-387 6 Oakland MD   9212 VERIZON MARYLAND, INC. 240      
301-387 7 Oakland MD   9212 VERIZON MARYLAND, INC. 240      
301-387 8 Oakland MD   9212 VERIZON MARYLAND, INC. 240      
301-387 9 Oakland MD   9212 VERIZON MARYLAND, INC. 240      

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

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