Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 412 [Rate centres in NPA 412] [Dial plan for NPA 412]

NXX: 437

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
412-437 A Pittsburgh Zone 6 PA   4007 LEVEL 3 COMMUNICATIONS, LLC - PA 234      
412-437 2 Pittsburgh Zone 6 PA PITEPADT7MD  4007 LEVEL 3 COMMUNICATIONS, LLC - PA 234      
412-437 3 Pittsburgh Zone 6 PA GIBSPAXGDS1  8597 FIDIUM ENTERPRISE SERVICES, LLC 234   2011-04-22   
412-437 6 Pittsburgh Zone 6 PA PITBPAWY2MD  6701 AERIAL COMMUNICATIONS, INC. 234   2021-05-10   
412-437 7 Pittsburgh Zone 6 PA PITBPAWY2MD  6701 AERIAL COMMUNICATIONS, INC. 234   2021-05-10   
412-437 8 Pittsburgh Zone 6 PA PITBPADTX2Z  002F BANDWIDTH.COM CLEC, LLC - PA 234   2011-09-26   

Last updated: Sun, 17 May 2026 03:26:51 UTC

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