Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Washington Zone 16, MD

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
301-877 A CLTNMDCLDS0  9212 VERIZON MARYLAND, INC. 236      
301-888 A BADNMDBNRS0  9212 VERIZON MARYLAND, INC. 236      
301-888 0 VINNVACBDS0  876D ONVOY, LLC - MD 236   2017-07-19   
301-888 1 BADNMDBNRS0  9212 VERIZON MARYLAND, INC. 236      
301-888 2 BADNMDBNRS0  9212 VERIZON MARYLAND, INC. 236      
301-888 3 VINNVACBDS0  876D ONVOY, LLC - MD 236   2017-08-13   
301-888 4 VINNVACBDS0  876D ONVOY, LLC - MD 236   2017-07-28   
301-888 5 VINNVACBDS0  876D ONVOY, LLC - MD 236   2014-10-27   
301-888 6 VINNVACBDS0  876D ONVOY, LLC - MD 236   2014-10-27   
301-888 7 VINNVACBDS0  876D ONVOY, LLC - MD 236   2017-07-28   
301-888 8 WASHDC12DS6  568G PEERLESS NETWORK OF MARYLAND, LLC 236   2012-04-02   
301-888 9 BADNMDBNRS0  9212 VERIZON MARYLAND, INC. 236      

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Last updated: Fri, 25 Jul 2025 03:21:23 UTC

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