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: 572 [Rate centres in NPA 572] [Dial plan for NPA 572]

NXX: 280

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
572-280 A Chickasha OK   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 536   2026-03-08   
572-280 8 Chickasha OK   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 536   2026-03-08   
572-280 9 Chickasha OK   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 536   2026-03-08   

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.