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: 557

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
412-557 A Pittsburgh Suburban Zone 20 PA PITBPAFHDS0  7978 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 234      
412-557 1 Pittsburgh Suburban Zone 20 PA PITBPAWY2MD  6701 AERIAL COMMUNICATIONS, INC. 234   2013-12-23   
412-557 2 Pittsburgh Suburban Zone 20 PA PITBPAWY2MD  6701 AERIAL COMMUNICATIONS, INC. 234   2013-12-23   
412-557 3 Pittsburgh Suburban Zone 20 PA PITBPAWY2MD  6701 AERIAL COMMUNICATIONS, INC. 234   2013-12-23   
412-557 4 Pittsburgh Suburban Zone 20 PA PITBPADTX7X  073H TELNYX LLC 234   2017-07-06   
412-557 5 Pittsburgh Suburban Zone 20 PA PITBPAOKX5X  752H BARR TELL USA, INC. - PA 234   2016-03-27   
412-557 7 Pittsburgh Suburban Zone 20 PA PITBPADTXYY  547E ONVOY, LLC - PA 234   2016-04-16   
412-557 8 Pittsburgh Suburban Zone 20 PA PITBPADTXYY  547E ONVOY, LLC - PA 234   2016-04-16   
412-557 9 Pittsburgh Suburban Zone 20 PA PITBPAFHDS0  7978 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA 234      

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.