Local Calling Guide

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Washington Zone 5, MD

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
301-909 0 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2013-06-18   
301-909 1 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2015-11-18   
301-909 2 WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-909 3 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2011-05-20   
301-909 4 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2011-04-23   
301-909 5 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2011-05-20   
301-909 6 WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-909 7 WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-909 8 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2011-05-20   
301-909 9 WASHDCINDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-925 A LDVRMDLODS0  9212 VERIZON MARYLAND, INC. 236      
301-940 A LDVRMDLORP0  9212 VERIZON MARYLAND, INC. 236      
301-967 A STLDMDSLDS0  9212 VERIZON MARYLAND, INC. 236      
301-981 A LARLMDCC5MD  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 236      

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Last updated: Sun, 07 Dec 2025 22:02:11 UTC

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