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: 549

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-549 A Dundalk MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-549 0 Dundalk MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-549 1 Dundalk MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-549 2 Dundalk MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-549 3 Dundalk MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      
443-549 4 Dundalk MD BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2015-05-13   
443-549 5 Dundalk MD BLTQMD012MD  964H BARR TELL USA, INC. 238   2016-12-17   
443-549 6 Dundalk MD BLTQMD018MD  145J TERRA NOVA TELECOM INC. 238   2024-02-15   
443-549 7 Dundalk MD BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2024-11-03   
443-549 8 Dundalk MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-549 9 Dundalk MD CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238      

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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