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: 410 [Rate centres in NPA 410] [Dial plan for NPA 410]

NXX: 348

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
410-348 A Still Pond MD STPNMDSPRS0  9212 VERIZON MARYLAND, INC. 242      
410-348 0 Still Pond MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2004-04-03   
410-348 1 Still Pond MD   876D ONVOY, LLC - MD 242   2021-03-05   
410-348 2 Still Pond MD   9212 VERIZON MARYLAND, INC. 242      
410-348 3 Still Pond MD   228C IDT AMERICA, CORP. - MD 242   2006-05-21   
410-348 4 Still Pond MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242   2016-10-16   
410-348 5 Still Pond MD   9212 VERIZON MARYLAND, INC. 242      
410-348 6 Still Pond MD   145J TERRA NOVA TELECOM INC. 242   2022-08-02   
410-348 7 Still Pond MD   876D ONVOY, LLC - MD 242   2017-04-14   
410-348 8 Still Pond MD   073H TELNYX LLC 242   2017-09-13   
410-348 9 Still Pond MD   9212 VERIZON MARYLAND, INC. 242      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.