Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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OCN: 2554 GLOBAL NAPS SOUTH, INC. - MD

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
443-638 A Ellicott City MD BLTMMDDN4MD  238      
443-697 A Catonsville MD BLTMMDDN4MD  238      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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