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: 644

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-644 A Jarrettsville MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-644 1 Jarrettsville MD BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-644 2 Jarrettsville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-22   
443-644 3 Jarrettsville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-644 4 Jarrettsville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-644 6 Jarrettsville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-22   
443-644 7 Jarrettsville MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-22   

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

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