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.

Switch: CRAFPACRDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
412-520 A Pittsburgh Zone 7 PA 9208 VERIZON PENNSYLVANIA, INC. 234      
412-919 A Pittsburgh Zone 7 PA 9208 VERIZON PENNSYLVANIA, INC. 234      
412-920 A Pittsburgh Zone 7 PA 9208 VERIZON PENNSYLVANIA, INC. 234      
412-921 A Pittsburgh Zone 7 PA 9208 VERIZON PENNSYLVANIA, INC. 234      
412-922 A Pittsburgh Zone 7 PA 9208 VERIZON PENNSYLVANIA, INC. 234      
412-928 A Pittsburgh Zone 7 PA 9208 VERIZON PENNSYLVANIA, INC. 234      
412-937 A Pittsburgh Zone 7 PA 9208 VERIZON PENNSYLVANIA, INC. 234      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.