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: 277

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
572-277 A Edmond OK   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 536   2025-09-22   
572-277 2 Edmond OK   145J TERRA NOVA TELECOM INC. 536   2026-01-10   
572-277 5 Edmond OK   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 536   2025-09-22   
572-277 6 Edmond OK   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 536   2025-09-22   
572-277 7 Edmond OK   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 536   2025-09-22   
572-277 8 Edmond OK   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 536   2025-09-22   
572-277 9 Edmond OK   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 536   2025-09-22   

Last updated: Thu, 05 Feb 2026 23:41:55 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.