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: 738

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-738 A Pikesville MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-738 0 Pikesville MD   829J PAETEC ITEL, LLC 238      
443-738 1 Pikesville MD   829J PAETEC ITEL, LLC 238      
443-738 2 Pikesville MD   829J PAETEC ITEL, LLC 238      
443-738 3 Pikesville MD   829J PAETEC ITEL, LLC 238      
443-738 4 Pikesville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-09-01   
443-738 5 Pikesville MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-09-01   
443-738 6 Pikesville MD BLTMMDCHDMD  551G NUSO, LLC 238   2016-08-31   
443-738 7 Pikesville MD   829J PAETEC ITEL, LLC 238      
443-738 8 Pikesville MD   829J PAETEC ITEL, LLC 238      
443-738 9 Pikesville MD   829J PAETEC ITEL, LLC 238      

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.