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: 628

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-628 A Glen Burnie MD BLTQMD01BMD  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-628 0 Glen Burnie MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-628 1 Glen Burnie MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-628 2 Glen Burnie MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
443-628 3 Glen Burnie MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-628 4 Glen Burnie MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-628 5 Glen Burnie MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-628 6 Glen Burnie MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238      
443-628 7 Glen Burnie MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-628 8 Glen Burnie MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238      
443-628 9 Glen Burnie MD BLTOMDKHBMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.