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: 701 [Rate centres in NPA 701] [Dial plan for NPA 701]

NXX: 503

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
701-503 A North McIntosh ND SXFLSDCOXUX  478J NUSO, LLC 640      
701-503 1 North McIntosh ND   478J NUSO, LLC 640   2020-10-27   
701-503 2 North McIntosh ND   624H ONVOY SPECTRUM, LLC 640   2021-10-29   
701-503 3 North McIntosh ND   452F ONVOY, LLC - ND 640   2021-06-13   
701-503 4 North McIntosh ND   452F ONVOY, LLC - ND 640   2021-02-12   
701-503 5 North McIntosh ND   452F ONVOY, LLC - ND 640   2021-02-12   
701-503 6 North McIntosh ND   8054 LEVEL 3 COMMUNICATIONS, LLC - ND 640   2023-01-08   
701-503 7 North McIntosh ND   624H ONVOY SPECTRUM, LLC 640   2021-07-18   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.