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: 438

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
410-438 A Sudlersville MD SDVLMDSDRS0  9212 VERIZON MARYLAND, INC. 242      
410-438 0 Sudlersville MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2004-04-03   
410-438 1 Sudlersville MD   073H TELNYX LLC 242   2017-09-13   
410-438 2 Sudlersville MD   9212 VERIZON MARYLAND, INC. 242      
410-438 3 Sudlersville MD   9212 VERIZON MARYLAND, INC. 242      
410-438 4 Sudlersville MD   145J TERRA NOVA TELECOM INC. 242   2024-02-14   
410-438 6 Sudlersville MD   228C IDT AMERICA, CORP. - MD 242   2006-05-21   
410-438 7 Sudlersville MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 242   2016-10-16   
410-438 8 Sudlersville MD   876D ONVOY, LLC - MD 242   2017-04-14   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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