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:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
301-574 A Washington Zone 15 MD MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      
301-574 0 Washington Zone 15 MD   9212 VERIZON MARYLAND, INC. 236      
301-574 1 Washington Zone 15 MD   9212 VERIZON MARYLAND, INC. 236      
301-574 2 Washington Zone 15 MD   9212 VERIZON MARYLAND, INC. 236      
301-574 3 Washington Zone 15 MD   9212 VERIZON MARYLAND, INC. 236      
301-574 4 Washington Zone 15 MD   9212 VERIZON MARYLAND, INC. 236      
301-574 5 Washington Zone 15 MD   9212 VERIZON MARYLAND, INC. 236      
301-574 6 Washington Zone 15 MD   2593 CORE COMMUNICATIONS, INC. - MD 236   2019-04-29   
301-574 7 Washington Zone 15 MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 236   2018-11-29   
301-574 8 Washington Zone 15 MD   9212 VERIZON MARYLAND, INC. 236      
301-574 9 Washington Zone 15 MD   9212 VERIZON MARYLAND, INC. 236      

Last updated: Thu, 10 Sep 2020 02:15:24 UTC

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