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: 238

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-238 A Parkton MD   829J PAETEC ITEL, LLC 238   2025-04-01   
443-238 0 Parkton MD   876D ONVOY, LLC - MD 238   2024-03-07   
443-238 1 Parkton MD   876D ONVOY, LLC - MD 238   2016-03-21   
443-238 2 Parkton MD   829J PAETEC ITEL, LLC 238      
443-238 3 Parkton MD   876D ONVOY, LLC - MD 238   2016-03-21   
443-238 4 Parkton MD   145J TERRA NOVA TELECOM INC. 238   2024-02-15   
443-238 5 Parkton MD   318J COMCAST IP PHONE, LLC 238   2015-09-21   
443-238 6 Parkton MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-238 7 Parkton MD   508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-06-12   
443-238 8 Parkton MD   073H TELNYX LLC 238   2017-04-26   
443-238 9 Parkton MD   145J TERRA NOVA TELECOM INC. 238   2024-09-12   

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

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