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: 606

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
701-606 A Bismarck ND BSMRNDJCTMD  700J WAVENATION, LLC 638   2025-09-06   
701-606 0 Bismarck ND BSMRNDJCTMD  700J WAVENATION, LLC 638   2025-09-06   
701-606 1 Bismarck ND   6568 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - ND 638   2026-08-12   
701-606 7 Bismarck ND   883K AHOI LLC 638   2026-07-31   
701-606 8 Bismarck ND BSMRNDBCX4X  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 638   2026-03-09   
701-606 9 Bismarck ND BSMRNDBCX4X  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 638   2026-03-09   

Last updated: Sat, 10 Oct 2026 15:24:20 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.