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: KCBGPAXKDS1

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
724-261 A Greensburg PA 050A CITIZENS TELECOM SOLUTIONS, LLC - PA 234      
878-291 A Taylorstown PA 2522 ADVANCED TELEPHONE SYS INC DBA HTC COMMUNICATIONS 234      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.