Local Calling Guide

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Washington Zone 14, MD

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
301-430 A UPMRMDCCDS0  9212 VERIZON MARYLAND, INC. 236      
301-430 0 UPMRMDCCDS0  9212 VERIZON MARYLAND, INC. 236      
301-430 1   515J IP HORIZON LLC 236   2016-05-31   
301-430 2 UPMRMDCCDS0  9212 VERIZON MARYLAND, INC. 236      
301-430 3   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
301-430 4   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
301-430 5 UPMRMDCCDS0  9212 VERIZON MARYLAND, INC. 236      
301-430 6 UPMRMDCCDS0  9212 VERIZON MARYLAND, INC. 236      
301-430 7 UPMRMDCCDS0  9212 VERIZON MARYLAND, INC. 236      
301-430 8 UPMRMDCCDS0  9212 VERIZON MARYLAND, INC. 236      
301-430 9   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
301-464 A BOWIMDBODS0  9212 VERIZON MARYLAND, INC. 236      
301-470 A LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
301-470 0   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
301-470 1 LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
301-470 2 LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
301-470 3 LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
301-470 4 LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
301-470 5 LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
301-470 6 LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
301-470 7 LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
301-470 8 LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
301-470 9 LARLMDLRDS0  9212 VERIZON MARYLAND, INC. 236      
301-666 A WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-666 0   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-06-16   
301-666 1   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
301-666 2 VINNVACBDS0  876D ONVOY, LLC - MD 236   2017-12-14   
301-666 3 WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-666 4   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
301-666 5   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-06-16   
301-666 6   2593 CORE COMMUNICATIONS, INC.- MD 236   2012-08-26   
301-666 7 WASIDCRG7MD  508J CENTURYLINK COMMUNICATIONS, LLC 236   2014-04-02   
301-666 8   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-06-16   
301-666 9   2593 CORE COMMUNICATIONS, INC.- MD 236   2018-10-23   
301-677 A WASHDCDTDS1  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-756 A LARLMDCC5MD  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 236      
301-756 0 LARLMDCC5MD  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 236      
301-756 1 WASHDC127MD  073H TELNYX LLC 236   2017-03-14   
301-756 2   2593 CORE COMMUNICATIONS, INC.- MD 236   2019-04-29   
301-756 3 LARLMDCC5MD  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 236      
301-756 4 LARLMDCC5MD  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 236      
301-756 5 VINNVACBDS0  876D ONVOY, LLC - MD 236   2020-04-30   
301-756 6 BTVLMD127MD  5562 METROPCS, INC. 236   2017-08-04   
301-756 7 LARLMDCC5MD  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 236      
301-756 8 LARLMDCC5MD  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 236      
301-756 9 LARLMDCC5MD  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 236      
301-794 A LNHMMDLNDS0  9212 VERIZON MARYLAND, INC. 236      
301-794 0 LNHMMDLNDS0  9212 VERIZON MARYLAND, INC. 236      
301-794 1 LNHMMDLNDS0  9212 VERIZON MARYLAND, INC. 236      
301-794 2   2593 CORE COMMUNICATIONS, INC.- MD 236   2019-04-29   

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Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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