Local Calling Guide

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Baltimore, MD

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NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
410-470 3 BLTMMDCHDS3  9212 VERIZON MARYLAND, INC. 238   2005-08-19   
410-470 4 BLTMMDCHDS3  9212 VERIZON MARYLAND, INC. 238   2005-08-19   
410-470 5 BLTMMDCHDS3  9212 VERIZON MARYLAND, INC. 238   2005-08-19   
410-470 6 BLTMMDCHDS3  9212 VERIZON MARYLAND, INC. 238   2005-08-19   
410-470 7 BLTMMDCHDS3  9212 VERIZON MARYLAND, INC. 238   2005-08-19   
410-470 8 BLTMMDCHDS3  9212 VERIZON MARYLAND, INC. 238   2005-08-19   
410-470 9 BLTMMDCHDS3  9212 VERIZON MARYLAND, INC. 238   2005-08-19   
410-478 A CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
410-478 0 CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2023-09-02   
410-478 1 CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2023-09-02   
410-478 2 CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2023-09-02   
410-478 3 CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2023-09-02   
410-478 4 CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2023-09-02   
410-478 5 CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2023-09-02   
410-478 6 CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2023-09-02   
410-478 7 CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2023-09-02   
410-478 8 CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2023-09-02   
410-478 9 CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2023-09-02   
410-481 A BLTMMDCH1DD  9212 VERIZON MARYLAND, INC. 238      
410-483 A BLTMMDFRRP0  9212 VERIZON MARYLAND, INC. 238      
410-483 0 BLTMMDFRRP0  9212 VERIZON MARYLAND, INC. 238      
410-483 1 BLTMMDFRRP0  9212 VERIZON MARYLAND, INC. 238      
410-483 2 BLTMMDFRRP0  9212 VERIZON MARYLAND, INC. 238      
410-483 3 BLTMMDFRRP0  9212 VERIZON MARYLAND, INC. 238      
410-483 4 BLTMMDFRRP0  9212 VERIZON MARYLAND, INC. 238      
410-483 5 BLTMMDFRRP0  9212 VERIZON MARYLAND, INC. 238      
410-483 6 BLTMMDFRRP0  9212 VERIZON MARYLAND, INC. 238      
410-483 7 BLTMMDFRRP0  9212 VERIZON MARYLAND, INC. 238      
410-483 8 PIVLMDPKXGX  829J PAETEC ITEL, LLC 238   2005-02-21   
410-483 9 BLTMMDFRRP0  9212 VERIZON MARYLAND, INC. 238      
410-485 A BLTMMDFRRP0  9212 VERIZON MARYLAND, INC. 238      
410-488 A BLTMMDFRRP0  9212 VERIZON MARYLAND, INC. 238      
410-493 A BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
410-493 0 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
410-493 1 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
410-493 2 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
410-493 3 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
410-493 4 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
410-493 5 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
410-493 6 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
410-493 7 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
410-493 8 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
410-493 9 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
410-499 A BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
410-499 0 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
410-499 1 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
410-499 2 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
410-499 3 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
410-499 4 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
410-499 5 BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      

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

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