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.

Pittsburgh Suburban Zone 15, PA

1 2 3 4 5 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
412-203 A PITEPADT7MD  4007 LEVEL 3 COMMUNICATIONS, LLC - PA 234      
412-203 0   3806 CORE COMMUNICATIONS, INC. - PA 234   2004-04-29   
412-203 1 PITEPADT7MD  4007 LEVEL 3 COMMUNICATIONS, LLC - PA 234      
412-203 2 PITBPADTXFX  624H ONVOY SPECTRUM, LLC 234   2022-02-12   
412-203 3 PITEPADT7MD  4007 LEVEL 3 COMMUNICATIONS, LLC - PA 234      
412-203 4 PITEPADT7MD  4007 LEVEL 3 COMMUNICATIONS, LLC - PA 234   2005-12-23   
412-203 5 PITBPADTX2Z  002F BANDWIDTH.COM CLEC, LLC - PA 234   2011-09-26   
412-203 6   3806 CORE COMMUNICATIONS, INC. - PA 234   2018-10-24   
412-203 7 MPTSPA020MD  422C ARMSTRONG TELECOMMUNICATIONS, INC. - PA 234   2008-10-26   
412-203 8 PITEPADT7MD  4007 LEVEL 3 COMMUNICATIONS, LLC - PA 234   2006-12-13   
412-203 9 PITBPADTXYY  547E ONVOY, LLC - PA 234   2024-03-09   
412-262 A CRPLPACODS0  9208 VERIZON PENNSYLVANIA, INC. 234      
412-264 A CRPLPACODS0  9208 VERIZON PENNSYLVANIA, INC. 234      
412-269 A CRPLPACODS0  9208 VERIZON PENNSYLVANIA, INC. 234      
412-299 A CRPLPACODS0  9208 VERIZON PENNSYLVANIA, INC. 234      
412-299 0 CRPLPACODS0  9208 VERIZON PENNSYLVANIA, INC. 234      
412-299 1 CRPLPACODS0  9208 VERIZON PENNSYLVANIA, INC. 234      
412-299 2 CRPLPACODS0  9208 VERIZON PENNSYLVANIA, INC. 234      
412-299 3 CRPLPACODS0  9208 VERIZON PENNSYLVANIA, INC. 234      
412-299 4 CRPLPACODS0  9208 VERIZON PENNSYLVANIA, INC. 234      
412-299 5   3806 CORE COMMUNICATIONS, INC. - PA 234   2018-10-24   
412-299 6 CRPLPACODS0  9208 VERIZON PENNSYLVANIA, INC. 234      
412-299 7 CRPLPACODS0  9208 VERIZON PENNSYLVANIA, INC. 234      
412-299 8 CRPLPACODS0  9208 VERIZON PENNSYLVANIA, INC. 234      
412-299 9 CRPLPACODS0  9208 VERIZON PENNSYLVANIA, INC. 234      
412-329 A   829J PAETEC ITEL, LLC 234   2025-03-04   
412-329 0   829J PAETEC ITEL, LLC 234      
412-329 1   829J PAETEC ITEL, LLC 234      
412-329 2   829J PAETEC ITEL, LLC 234      
412-329 3   829J PAETEC ITEL, LLC 234      
412-329 4 PITEPADT7MD  4007 LEVEL 3 COMMUNICATIONS, LLC - PA 234   2003-08-20   
412-329 5   829J PAETEC ITEL, LLC 234   2004-10-01   
412-329 6 PITEPADT7MD  4007 LEVEL 3 COMMUNICATIONS, LLC - PA 234   2005-02-25   
412-329 7 PITBPAIW0MD  318J COMCAST IP PHONE, LLC 234   2009-07-03   
412-329 8 PITBPADTX2Z  002F BANDWIDTH.COM CLEC, LLC - PA 234   2008-12-19   
412-329 9   829J PAETEC ITEL, LLC 234      
412-375 A PITBPAMADS0  7315 TELEPORT COMMUNICATIONS AMERICA, LLC - PA 234      
412-375 0 PITBPAOKX5X  752H BARR TELL USA, INC. - PA 234   2016-03-27   
412-375 1 PITBPADTXYY  547E ONVOY, LLC - PA 234   2024-04-19   
412-375 2 PITBPAIW0MD  318J COMCAST IP PHONE, LLC 234   2013-07-07   
412-375 3 PITBPAMADS0  7315 TELEPORT COMMUNICATIONS AMERICA, LLC - PA 234      
412-375 4 PITBPAMADS0  7315 TELEPORT COMMUNICATIONS AMERICA, LLC - PA 234      
412-375 5 PITBPAMADS0  7315 TELEPORT COMMUNICATIONS AMERICA, LLC - PA 234      
412-375 6 PITBPAMADS0  7315 TELEPORT COMMUNICATIONS AMERICA, LLC - PA 234      
412-375 7 PITBPAIW0MD  318J COMCAST IP PHONE, LLC 234   2003-08-19   
412-375 8 PITBPAIW0MD  318J COMCAST IP PHONE, LLC 234   2016-12-01   
412-375 9 PITBPADTXYY  547E ONVOY, LLC - PA 234   2024-06-07   
412-397 A   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 234      
412-397 0   547E ONVOY, LLC - PA 234   2025-10-26   
412-397 1 PITBPADTXYY  547E ONVOY, LLC - PA 234   2024-07-05   

1 2 3 4 5 >>

Last updated: Thu, 05 Feb 2026 23:41:55 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.