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: 737

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-737 A Waterloo MD BLTMMDCHW29  4716 PAETEC COMMUNICATIONS, INC. - MD 238      
443-737 0 Waterloo MD BLTMMDCHW29  4716 PAETEC COMMUNICATIONS, INC. - MD 238      
443-737 1 Waterloo MD BLTMMDCHW29  4716 PAETEC COMMUNICATIONS, INC. - MD 238      
443-737 2 Waterloo MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-737 3 Waterloo MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-737 4 Waterloo MD BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-737 5 Waterloo MD   2593 CORE COMMUNICATIONS, INC.- MD 238      
443-737 6 Waterloo MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-737 7 Waterloo MD BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
443-737 8 Waterloo MD   515J IP HORIZON LLC 238      
443-737 9 Waterloo MD BLTMMDCHW29  4716 PAETEC COMMUNICATIONS, INC. - MD 238      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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