Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 443 [Rate centres in NPA 443] [Dial plan for NPA 443]

NXX: 434

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-434 A Federalsburg MD SLBRMDSBWMD  073H TELNYX LLC 242      
443-434 0 Federalsburg MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242   2019-03-04   
443-434 1 Federalsburg MD SLBRMDSBWMD  073H TELNYX LLC 242   2017-09-13   
443-434 2 Federalsburg MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2018-06-17   
443-434 3 Federalsburg MD SLBRMDSBXLX  318J COMCAST IP PHONE, LLC 242   2006-07-31   
443-434 4 Federalsburg MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242   2017-04-13   
443-434 5 Federalsburg MD SLBRMDSBXLX  318J COMCAST IP PHONE, LLC 242   2015-09-21   
443-434 6 Federalsburg MD SLBRMDSBXUX  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 242   2012-07-13   
443-434 7 Federalsburg MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2018-06-17   
443-434 8 Federalsburg MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2018-06-17   
443-434 9 Federalsburg MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242   2019-03-04   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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