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: 531 [Rate centres in NPA 531] [Dial plan for NPA 531]

NXX: 288

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
531-288 A Madison NE OMAHNENWGT6  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 644      
531-288 6 Madison NE OMAHNENWXEX  7144 TELEPORT COMMUNICATIONS AMERICA, LLC - NE 644      
531-288 7 Madison NE   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 644      
531-288 8 Madison NE   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 644      
531-288 9 Madison NE OMAHNENWGT6  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 644      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.