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: 302

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-302 A Crofton MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-302 0 Crofton MD   145J TERRA NOVA TELECOM INC. 238   2024-10-12   
443-302 2 Crofton MD   318J COMCAST IP PHONE, LLC 238   2008-03-20   
443-302 3 Crofton MD   876D ONVOY, LLC - MD 238   2021-05-21   
443-302 6 Crofton MD   7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-302 7 Crofton MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-02-12   
443-302 8 Crofton MD   876D ONVOY, LLC - MD 238   2021-05-21   
443-302 9 Crofton MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2008-12-11   

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

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