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: 489

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-489 A Chase MD BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-489 0 Chase MD   4773 XO MARYLAND, LLC 238   2001-11-19   
443-489 1 Chase MD   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-489 2 Chase MD   876D ONVOY, LLC - MD 238   2016-03-24   
443-489 3 Chase MD   2697 CTC COMMUNICATIONS CORP. - MD 238   2007-01-24   
443-489 4 Chase MD   876D ONVOY, LLC - MD 238   2016-03-24   
443-489 5 Chase MD   7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-489 6 Chase MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-02-13   
443-489 7 Chase MD   508J CENTURYLINK COMMUNICATIONS LLC 238   2014-06-25   
443-489 8 Chase MD   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-489 9 Chase MD   7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      

Last updated: Fri, 01 Jul 2022 02:53:40 UTC

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