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: 258

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-258 A Easton MD SLBRMDSCXLX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242      
443-258 0 Easton MD SLBRMDSCXLX  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 242      
443-258 1 Easton MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-258 2 Easton MD SLBRMDSB8MD  2589 US LEC OF MARYLAND, INC. 242      
443-258 3 Easton MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242      
443-258 4 Easton MD   2593 CORE COMMUNICATIONS, INC.- MD 242      
443-258 5 Easton MD   876D ONVOY, LLC - MD 242      
443-258 6 Easton MD SLBRMDSBXUX  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 242      
443-258 7 Easton MD   2593 CORE COMMUNICATIONS, INC.- MD 242      
443-258 8 Easton MD   2593 CORE COMMUNICATIONS, INC.- MD 242      
443-258 9 Easton MD SLBRMD90DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 242      

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.