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: 605 [Rate centres in NPA 605] [Dial plan for NPA 605]

NXX: 974

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
605-974 A Rapid City SD   6701 AERIAL COMMUNICATIONS, INC. 640   2025-04-24   
605-974 0 Rapid City SD   6701 AERIAL COMMUNICATIONS, INC. 640   2025-04-24   
605-974 1 Rapid City SD   6569 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 640   2025-04-27   
605-974 6 Rapid City SD   693G TELEPORT COMMUNICATIONS AMERICA SD-LLC 640   2025-06-19   
605-974 7 Rapid City SD   693G TELEPORT COMMUNICATIONS AMERICA SD-LLC 640   2025-06-19   
605-974 8 Rapid City SD   6569 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD 640   2025-06-17   
605-974 9 Rapid City SD   6701 AERIAL COMMUNICATIONS, INC. 640   2025-04-24   

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.