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: 319

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-319 A Columbia MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-319 0 Columbia MD   829J PAETEC ITEL, LLC 238      
443-319 1 Columbia MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2020-08-13   
443-319 2 Columbia MD   5562 METROPCS, INC. 238   2016-01-08   
443-319 3 Columbia MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2008-06-16   
443-319 4 Columbia MD   829J PAETEC ITEL, LLC 238   2005-07-04   
443-319 5 Columbia MD   318J COMCAST IP PHONE, LLC 238   2005-03-10   
443-319 6 Columbia MD   829J PAETEC ITEL, LLC 238      
443-319 7 Columbia MD   5562 METROPCS, INC. 238   2016-02-03   
443-319 8 Columbia MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238   2010-11-19   
443-319 9 Columbia MD   829J PAETEC ITEL, LLC 238      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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