Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

NPA: 412 [Rate centres in NPA 412] [Dial plan for NPA 412]

NXX: 948

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
412-948 A Pittsburgh Suburban Zone 10 PA GIBSPAXGDS1  8597 FIDIUM ENTERPRISE SERVICES, LLC 234      
412-948 1 Pittsburgh Suburban Zone 10 PA GIBSPAXGDS1  8597 FIDIUM ENTERPRISE SERVICES, LLC 234      
412-948 4 Pittsburgh Suburban Zone 10 PA PITBPAOKXUX  145J TERRA NOVA TELECOM INC. 234   2024-02-13   
412-948 5 Pittsburgh Suburban Zone 10 PA   515J IP HORIZON LLC 234   2018-12-10   
412-948 6 Pittsburgh Suburban Zone 10 PA   515J IP HORIZON LLC 234   2018-12-10   
412-948 7 Pittsburgh Suburban Zone 10 PA PITBPADTXYY  547E ONVOY, LLC - PA 234   2019-01-06   

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.