Local Calling Guide

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

NXX: 689

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-689 A Cockeysville MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-689 0 Cockeysville MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-689 1 Cockeysville MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2021-03-24   
443-689 2 Cockeysville MD BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238   2017-06-21   
443-689 3 Cockeysville MD BLTQMD012MD  964H BARR TELL USA, INC. 238   2016-12-17   
443-689 4 Cockeysville MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-689 5 Cockeysville MD HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-689 6 Cockeysville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-19   
443-689 7 Cockeysville MD BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238   2013-11-11   
443-689 9 Cockeysville MD BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-05-22   

Last updated: Wed, 01 Jun 2022 03:09:23 UTC

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