Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 443 [Rate centres in NPA 443] [Dial plan for NPA 443]

NXX: 519

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-519 A Towson MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-519 0 Towson MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2024-12-17   
443-519 1 Towson MD   145J TERRA NOVA TELECOM INC. 238   2024-10-12   
443-519 2 Towson MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2004-12-28   
443-519 3 Towson MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-05-01   
443-519 4 Towson MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2025-11-19   
443-519 5 Towson MD   318J COMCAST IP PHONE, LLC 238   2008-04-30   
443-519 6 Towson MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-06-01   
443-519 7 Towson MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-06-01   
443-519 8 Towson MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-06-01   
443-519 9 Towson MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2005-06-01   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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