Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Washington Zone 15, MD

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
301-358 9 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
301-574 A MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      
301-574 0 MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      
301-574 1 MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      
301-574 2 MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      
301-574 3 MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      
301-574 4 MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      
301-574 5 MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      
301-574 6   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-574 7 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236      
301-574 8 MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      
301-574 9 MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      
301-627 A MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      
301-715 A WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-715 0   515J IP HORIZON LLC 236      
301-715 1   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-715 2 WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-715 3 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
301-715 4   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-715 5   2593 CORE COMMUNICATIONS, INC.- MD 236      
301-715 6 WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236      
301-715 7   624H ONVOY SPECTRUM, LLC 236      
301-715 8 WASHDC12DS6  568G PEERLESS NETWORK OF MARYLAND, LLC 236      
301-715 9   515J IP HORIZON LLC 236      
301-780 A MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      
301-780 0 MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      
301-780 1 MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      
301-780 2 MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      
301-780 3 MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      
301-780 4 VINNVACBDS0  876D ONVOY, LLC - MD 236      
301-780 5 MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      
301-780 6 MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      
301-780 7 MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      
301-780 8 MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      
301-780 9 MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      
301-952 A MRBOMDMBDS0  9212 VERIZON MARYLAND, INC. 236      

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Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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