Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 443 [Rate centres in NPA 443] [Dial plan for NPA 443]

NXX:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-600 A Essex MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-600 0 Essex MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-600 1 Essex MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-600 2 Essex MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-04-15   
443-600 3 Essex MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-08-13   
443-600 4 Essex MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2005-10-09   
443-600 5 Essex MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2006-01-21   
443-600 6 Essex MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      
443-600 7 Essex MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2006-03-30   
443-600 8 Essex MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2006-05-06   
443-600 9 Essex MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238      

Last updated: Sun, 10 Nov 2019 13:49:34 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.