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: 725

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-725 A Parkville MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-725 0 Parkville MD   829J PAETEC ITEL, LLC 238      
443-725 1 Parkville MD   829J PAETEC ITEL, LLC 238      
443-725 2 Parkville MD   829J PAETEC ITEL, LLC 238      
443-725 3 Parkville MD   829J PAETEC ITEL, LLC 238      
443-725 4 Parkville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2006-12-29   
443-725 5 Parkville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2006-12-29   
443-725 6 Parkville MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2019-02-08   
443-725 7 Parkville MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2016-12-15   
443-725 8 Parkville MD   829J PAETEC ITEL, LLC 238      
443-725 9 Parkville MD   829J PAETEC ITEL, LLC 238      

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.