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: 552

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
572-552 A Calvin OK OKCYOKCEXJY  409F ONVOY, LLC - OK 536      
572-552 0 Calvin OK OKCZOKZC8MD  073H TELNYX LLC 536   2023-05-14   
572-552 1 Calvin OK OKCYOKCEXJY  409F ONVOY, LLC - OK 536   2023-07-24   
572-552 2 Calvin OK OKCYOKCEXMZ  145J TERRA NOVA TELECOM INC. 536   2023-08-10   
572-552 5 Calvin OK OKCYOKCEXJY  409F ONVOY, LLC - OK 536   2023-03-16   
572-552 9 Calvin OK OKCYOKCEDS7  384H PEERLESS NETWORK OF OKLAHOMA, LLC - OK 536   2023-07-27   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.