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: 972

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-972 A Cambridge MD SLBRMDSB8MD  2589 US LEC OF MARYLAND, INC. 242      
443-972 0 Cambridge MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242   2016-04-12   
443-972 1 Cambridge MD SLBRMDSCXMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 242   2016-04-12   
443-972 2 Cambridge MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-07-31   
443-972 3 Cambridge MD ESTNMDESQMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 242   2022-09-13   
443-972 4 Cambridge MD SLBRMDSB8MD  2589 US LEC OF MARYLAND, INC. 242   2012-08-15   
443-972 5 Cambridge MD SLBRMDSBXVX  876D ONVOY, LLC - MD 242   2017-04-13   
443-972 6 Cambridge MD   2593 CORE COMMUNICATIONS, INC.- MD 242   2019-07-31   
443-972 7 Cambridge MD ESTNMDESMMD  228C IDT AMERICA, CORP. - MD 242   2018-01-14   
443-972 8 Cambridge MD SLBRMDSBXLX  318J COMCAST IP PHONE, LLC 242   2021-03-08   
443-972 9 Cambridge MD SLBRMD902MD  073H TELNYX LLC 242   2017-10-19   

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

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