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.

Granite, OK

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
580-201 A OKCYOKCEXOY  530C TELEPORT COMMUNICATIONS AMERICA OK - LLC 536      
580-201 0 OKCYOKCEXJZ  624H ONVOY SPECTRUM, LLC 536   2025-01-22   
580-201 6 OKCYOKCEXOY  530C TELEPORT COMMUNICATIONS AMERICA OK - LLC 536   2022-12-20   
580-535 A GRANOKMARS1  9533 SOUTHWESTERN BELL 536      
580-535 0 OKCYOKCEDS7  384H PEERLESS NETWORK OF OKLAHOMA, LLC - OK 536   2016-02-19   
580-535 1 GRANOKMARS1  9533 SOUTHWESTERN BELL 536      
580-535 2 OKCYOKCEXBZ  073H TELNYX LLC 536   2019-09-28   
580-535 4 GRANOKMARS1  9533 SOUTHWESTERN BELL 536      
580-535 5 OKCYOKCEXJY  409F ONVOY, LLC - OK 536   2021-03-04   
580-535 6   145J TERRA NOVA TELECOM INC. 536   2025-07-10   
580-535 7 OKCYOKCEXXY  516C AT&T CORP. 536   2011-02-05   
580-535 8 OKCYOKCEXJY  409F ONVOY, LLC - OK 536   2016-06-15   
580-535 9 OKCYOKCEXJY  409F ONVOY, LLC - OK 536   2016-06-15   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.