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: 515 [Rate centres in NPA 515] [Dial plan for NPA 515]

NXX: 420

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
515-420 A Polk City IA PKCYIACORS0  9631 QWEST CORPORATION 632      
515-420 0 Polk City IA   221F ONVOY, LLC - IA 632   2016-04-06   
515-420 1 Polk City IA   221F ONVOY, LLC - IA 632   2016-04-06   
515-420 2 Polk City IA   221F ONVOY, LLC - IA 632   2019-09-20   
515-420 3 Polk City IA   221F ONVOY, LLC - IA 632   2020-05-14   
515-420 4 Polk City IA   544H INTEGRATED PATH COMMUNCATIONS, LLC - IA 632   2018-05-14   
515-420 5 Polk City IA   221F ONVOY, LLC - IA 632   2019-09-20   
515-420 6 Polk City IA   508J CENTURYLINK COMMUNICATIONS, LLC 632   2017-03-28   
515-420 7 Polk City IA   9631 QWEST CORPORATION 632   2014-06-27   
515-420 8 Polk City IA   073H TELNYX LLC 632   2020-05-29   
515-420 9 Polk City IA   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 632   2018-08-22   

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.