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: 512

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
443-512 A Edgewood MD WNRNMDWNRS1  9212 VERIZON MARYLAND, INC. 238      
443-512 0 Edgewood MD   9212 VERIZON MARYLAND, INC. 238      
443-512 1 Edgewood MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2020-07-10   
443-512 2 Edgewood MD   876D ONVOY, LLC - MD 238   2014-09-05   
443-512 3 Edgewood MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-30   
443-512 4 Edgewood MD   5562 METROPCS, INC. 238   2017-01-19   
443-512 5 Edgewood MD   5562 METROPCS, INC. 238   2017-01-19   
443-512 6 Edgewood MD   5562 METROPCS, INC. 238   2018-07-05   
443-512 7 Edgewood MD   5562 METROPCS, INC. 238   2018-10-14   
443-512 8 Edgewood MD   9212 VERIZON MARYLAND, INC. 238      
443-512 9 Edgewood MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-04-30   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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