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: 689

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-689 A Cockeysville MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-689 0 Cockeysville MD   829J PAETEC ITEL, LLC 238      
443-689 1 Cockeysville MD   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2021-03-24   
443-689 2 Cockeysville MD   318J COMCAST IP PHONE, LLC 238   2017-06-21   
443-689 3 Cockeysville MD   964H BARR TELL USA, INC. 238   2016-12-17   
443-689 4 Cockeysville MD   829J PAETEC ITEL, LLC 238      
443-689 5 Cockeysville MD   829J PAETEC ITEL, LLC 238      
443-689 7 Cockeysville MD   318J COMCAST IP PHONE, LLC 238   2013-11-11   
443-689 8 Cockeysville MD   145J TERRA NOVA TELECOM INC. 238   2023-08-06   
443-689 9 Cockeysville MD   624H ONVOY SPECTRUM, LLC 238   2021-05-22   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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