Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Washington Zone 14 (Baltimore LATA), MD

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
301-858 1 COTNMDCRDS0  9212 VERIZON MARYLAND, INC. 238      
301-858 2 PARLMDPADS0  9212 VERIZON MARYLAND, INC. 238      
301-858 3 PARLMDPADS0  9212 VERIZON MARYLAND, INC. 238      
301-858 4 PARLMDPADS0  9212 VERIZON MARYLAND, INC. 238      
301-858 5 ANNPMDANDS0  9212 VERIZON MARYLAND, INC. 238      
301-858 6 ANNPMDANDS0  9212 VERIZON MARYLAND, INC. 238      
301-858 7 STMRMDSMRS1  9212 VERIZON MARYLAND, INC. 238      
301-858 8 ANNPMDANDS0  9212 VERIZON MARYLAND, INC. 238      
301-858 9 COTNMDCRDS0  9212 VERIZON MARYLAND, INC. 238      
301-889 A GLVLMDGLRS1  9212 VERIZON MARYLAND, INC. 238      
301-889 0 GLVLMDGLRS1  9212 VERIZON MARYLAND, INC. 238      
301-889 1 BLTMMDCHXVX  321J HD CARRIER LLC 238      
301-889 2 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238      
301-889 3 BLTMMDCHXVX  321J HD CARRIER LLC 238      
301-889 4 BLTMMDCHXVX  321J HD CARRIER LLC 238      
301-889 5   321J HD CARRIER LLC 238      
301-889 6   321J HD CARRIER LLC 238      
301-889 7   321J HD CARRIER LLC 238      
301-889 8 BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
301-889 9 BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
301-912 A ODTNMDONDS0  9212 VERIZON MARYLAND, INC. 238      
301-912 0 ODTNMDONDS0  9212 VERIZON MARYLAND, INC. 238      
301-912 1 ODTNMDONDS0  9212 VERIZON MARYLAND, INC. 238      
301-912 2 ODTNMDONDS0  9212 VERIZON MARYLAND, INC. 238      
301-912 3 ODTNMDPORS2  9212 VERIZON MARYLAND, INC. 238      
301-912 4 ODTNMDONDS0  9212 VERIZON MARYLAND, INC. 238      
301-912 5 ODTNMDPORS2  9212 VERIZON MARYLAND, INC. 238      
301-912 6 ODTNMDONDS0  9212 VERIZON MARYLAND, INC. 238      
301-912 7 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
301-912 8 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
301-912 9 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
301-970 A PARLMDPADS0  9212 VERIZON MARYLAND, INC. 238      
301-970 0   2593 CORE COMMUNICATIONS, INC.- MD 238      
301-970 1   2593 CORE COMMUNICATIONS, INC.- MD 238      
301-970 2 PARLMDPADS0  9212 VERIZON MARYLAND, INC. 238      
301-970 3 BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
301-970 4 BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
301-970 5 PARLMDPADS0  9212 VERIZON MARYLAND, INC. 238      
301-970 6 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238      
301-970 7   7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
301-970 8   2593 CORE COMMUNICATIONS, INC.- MD 238      
301-970 9 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
301-973 A BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238      
301-973 0   2593 CORE COMMUNICATIONS, INC.- MD 238      
301-973 1   2593 CORE COMMUNICATIONS, INC.- MD 238      
301-973 2   2593 CORE COMMUNICATIONS, INC.- MD 238      
301-973 3 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238      
301-973 4 BLTMMDCHXVX  321J HD CARRIER LLC 238      
301-973 5 BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
301-973 6 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238      
301-973 7   2593 CORE COMMUNICATIONS, INC.- MD 238      
301-973 8   2593 CORE COMMUNICATIONS, INC.- MD 238      
301-973 9   2593 CORE COMMUNICATIONS, INC.- MD 238      

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

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