Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 410 [Rate centres in NPA 410] [Dial plan for NPA 410]

NXX: 639

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
410-639 A Rock Hall MD RKHLMDRHRS0  9212 VERIZON MARYLAND, INC. 242      
410-639 0 Rock Hall MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2004-04-03   
410-639 2 Rock Hall MD RKHLMDRHRS0  9212 VERIZON MARYLAND, INC. 242      
410-639 3 Rock Hall MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242   2017-04-14   
410-639 4 Rock Hall MD ESTNMDESMMD  228C IDT AMERICA, CORP. - MD 242   2006-05-21   
410-639 5 Rock Hall MD ESTNMDES5MD  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 242   2017-09-18   
410-639 6 Rock Hall MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242   2021-03-05   
410-639 7 Rock Hall MD RKHLMDRHRS0  9212 VERIZON MARYLAND, INC. 242      
410-639 8 Rock Hall MD SLBRMD902MD  073H TELNYX LLC 242   2017-09-13   
410-639 9 Rock Hall MD RKHLMDRHRS0  9212 VERIZON MARYLAND, INC. 242      

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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