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: 319 [Rate centres in NPA 319] [Dial plan for NPA 319]

NXX: 678

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
319-678 A Iowa City IA IWCYIATCDS0  9631 QWEST CORPORATION 635      
319-678 0 Iowa City IA   9631 QWEST CORPORATION 635   2012-08-09   
319-678 1 Iowa City IA   9631 QWEST CORPORATION 635   2012-08-09   
319-678 2 Iowa City IA   9631 QWEST CORPORATION 635   2012-08-09   
319-678 3 Iowa City IA   9631 QWEST CORPORATION 635   2012-08-09   
319-678 4 Iowa City IA   9631 QWEST CORPORATION 635   2012-08-09   
319-678 5 Iowa City IA   9631 QWEST CORPORATION 635   2012-08-09   
319-678 6 Iowa City IA   9631 QWEST CORPORATION 635   2012-08-09   
319-678 7 Iowa City IA   9631 QWEST CORPORATION 635   2012-08-09   
319-678 8 Iowa City IA   9631 QWEST CORPORATION 635   2012-08-09   
319-678 9 Iowa City IA   9631 QWEST CORPORATION 635   2012-08-09   

Last updated: Fri, 13 May 2022 22:16:13 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.