Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Washington Zone 13, MD

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
301-489 5   9212 VERIZON MARYLAND, INC. 236      
301-489 6   9212 VERIZON MARYLAND, INC. 236      
301-489 7   9212 VERIZON MARYLAND, INC. 236      
301-489 8   9212 VERIZON MARYLAND, INC. 236      
301-489 9   9212 VERIZON MARYLAND, INC. 236      
301-506 A SLSPMDSSX6X  6630 USA MOBILITY WIRELESS, INC. 236      
301-507 A CLPKMDBWDS0  9212 VERIZON MARYLAND, INC. 236      
301-507 0   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
301-507 1   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
301-507 2   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
301-507 3   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
301-507 4   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
301-507 5   9212 VERIZON MARYLAND, INC. 236      
301-507 6   9212 VERIZON MARYLAND, INC. 236      
301-507 7   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
301-507 8   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
301-507 9   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
301-510 A SLSPMDSSX6X  6630 USA MOBILITY WIRELESS, INC. 236      
301-513 A CLPKMDBWDS0  9212 VERIZON MARYLAND, INC. 236      
301-513 0   9212 VERIZON MARYLAND, INC. 236      
301-513 1   9212 VERIZON MARYLAND, INC. 236      
301-513 2   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
301-513 3   9212 VERIZON MARYLAND, INC. 236      
301-513 4   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
301-513 5   9212 VERIZON MARYLAND, INC. 236      
301-513 6   9212 VERIZON MARYLAND, INC. 236      
301-513 7   9212 VERIZON MARYLAND, INC. 236      
301-513 8   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
301-513 9   9212 VERIZON MARYLAND, INC. 236      
301-552 A LNHMMDLNDS0  9212 VERIZON MARYLAND, INC. 236      
301-558 A SLSPMDSSX6X  6630 USA MOBILITY WIRELESS, INC. 236      
301-566 A MRKKMDMKDS0  9212 VERIZON MARYLAND, INC. 236      
301-595 A BTVLMDBVDS0  9212 VERIZON MARYLAND, INC. 236      
301-614 A CLPKMDBWDS0  9212 VERIZON MARYLAND, INC. 236      
301-615 A WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-623 A WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-623 0   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-623 1   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-623 2   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-623 3   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-623 4   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-623 5   2593 CORE COMMUNICATIONS, INC.- MD 236   2019-04-29   
301-623 6   2593 CORE COMMUNICATIONS, INC.- MD 236   2019-04-29   
301-623 7   2593 CORE COMMUNICATIONS, INC.- MD 236   2019-04-29   
301-623 8   2593 CORE COMMUNICATIONS, INC.- MD 236   2019-04-15   
301-623 9   2593 CORE COMMUNICATIONS, INC.- MD 236   2019-04-15   
301-647 A WASHDCDP8MD  9748 AMERICAN MESSAGING SERVICES, LLC 236      
301-688 A LARLMDDYDS0  9212 VERIZON MARYLAND, INC. 236      
301-701 A WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-701 0   5562 METROPCS, INC. 236   2018-04-08   

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Last updated: Fri, 01 Jul 2022 02:53:40 UTC

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