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: CDRRIAAB6MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
319-242 4 Cedar Falls IA 353E YMAX COMMUNICATIONS CORP. - IA 635   2009-03-13   
319-427 5 Waterloo IA 353E YMAX COMMUNICATIONS CORP. - IA 635   2009-03-13   
319-804 0 Cedar Rapids IA 353E YMAX COMMUNICATIONS CORP. - IA 635   2009-01-29   
319-855 4 Iowa City IA 353E YMAX COMMUNICATIONS CORP. - IA 635   2009-03-13   
319-855 5 Iowa City IA 353E YMAX COMMUNICATIONS CORP. - IA 635   2009-03-13   
319-930 3 Iowa City IA 353E YMAX COMMUNICATIONS CORP. - IA 635   2009-03-13   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.