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: 501 [Rate centres in NPA 501] [Dial plan for NPA 501]

NXX: 557

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
501-557 A Bauxite AR BAXTARBXRS1  9533 SOUTHWESTERN BELL 528      
501-557 0 Bauxite AR   348F ONVOY, LLC - AR 528   2017-03-27   
501-557 1 Bauxite AR   9533 SOUTHWESTERN BELL 528      
501-557 2 Bauxite AR   9533 SOUTHWESTERN BELL 528      
501-557 3 Bauxite AR   196F BANDWIDTH.COM CLEC, LLC - AR 528   2014-07-27   
501-557 4 Bauxite AR   516C AT&T CORP. 528   2011-04-15   
501-557 5 Bauxite AR   9533 SOUTHWESTERN BELL 528      
501-557 6 Bauxite AR   196F BANDWIDTH.COM CLEC, LLC - AR 528   2014-12-13   
501-557 7 Bauxite AR   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 528   2014-04-14   
501-557 8 Bauxite AR   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 528   2013-04-01   
501-557 9 Bauxite AR   9533 SOUTHWESTERN BELL 528      

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.