Local Calling Guide

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Baltimore, MD

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
410-362 A BLTMMDEDRP0  9212 VERIZON MARYLAND, INC. 238      
410-365 A BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
410-365 0 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
410-365 1 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
410-365 2 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
410-365 3 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
410-365 4 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
410-365 5 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
410-365 6 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
410-365 7 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
410-365 8 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
410-365 9 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
410-366 A BLTMMDUVDS0  9212 VERIZON MARYLAND, INC. 238      
410-367 A BLTMMDLBRP0  9212 VERIZON MARYLAND, INC. 238      
410-368 A ARBTMDARDS0  9212 VERIZON MARYLAND, INC. 238      
410-368 0 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2020-07-04   
410-368 1 ARBTMDARDS0  9212 VERIZON MARYLAND, INC. 238      
410-368 2 ARBTMDARDS0  9212 VERIZON MARYLAND, INC. 238      
410-368 3 ARBTMDARDS0  9212 VERIZON MARYLAND, INC. 238      
410-368 4 ARBTMDARDS0  9212 VERIZON MARYLAND, INC. 238      
410-368 5 ARBTMDARDS0  9212 VERIZON MARYLAND, INC. 238      
410-368 6 ARBTMDARDS0  9212 VERIZON MARYLAND, INC. 238      
410-368 7 ARBTMDARDS0  9212 VERIZON MARYLAND, INC. 238      
410-368 8 ARBTMDARDS0  9212 VERIZON MARYLAND, INC. 238      
410-368 9 ARBTMDARDS0  9212 VERIZON MARYLAND, INC. 238      
410-369 A BLTMMDSNNMD  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-369 0 BLTMMDSNNMD  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-369 1 BLTMMDSNNMD  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-369 2 BLTMMDSNNMD  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-369 3 BLTMMDSNNMD  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-369 4 BLTMMDSNNMD  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-369 5 BLTMMDSNNMD  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-369 6 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2006-01-13   
410-369 7 BLTMMDSNNMD  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-369 8 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2006-01-13   
410-369 9 BLTMMDSNNMD  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 238      
410-371 A BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
410-375 A BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
410-382 A BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      
410-383 A BLTMMDMDDS0  9212 VERIZON MARYLAND, INC. 238      
410-385 A BLTMMDCHDS3  9212 VERIZON MARYLAND, INC. 238      
410-387 A PIVLMDPKXEX  829J PAETEC ITEL, LLC 238   2025-04-01   
410-387 0 BLTMMDCH08Z  4492 VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 238   2011-10-11   
410-387 1 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-10-28   
410-387 2 PIVLMDPKXEX  829J PAETEC ITEL, LLC 238   2011-10-09   
410-387 3 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-10-28   
410-387 4 PIVLMDPKXEX  829J PAETEC ITEL, LLC 238   2011-10-09   
410-387 5 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-10-28   
410-387 6 BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-10-28   
410-387 7 PIVLMDPKXFX  829J PAETEC ITEL, LLC 238   2011-10-11   

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Last updated: Tue, 29 Sep 2026 03:00:13 UTC

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