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: 884

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
605-884 A Watertown SD WTTWSDCODS0  9631 QWEST CORPORATION 640      
605-884 0 Watertown SD   9631 QWEST CORPORATION 640      
605-884 1 Watertown SD   9631 QWEST CORPORATION 640      
605-884 2 Watertown SD   9631 QWEST CORPORATION 640      
605-884 3 Watertown SD   9631 QWEST CORPORATION 640      
605-884 4 Watertown SD   9631 QWEST CORPORATION 640      
605-884 5 Watertown SD   5180 LEVEL 3 COMMUNICATIONS, LLC - SD 640   2004-06-03   
605-884 6 Watertown SD   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 640   2007-10-01   
605-884 7 Watertown SD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 640   2008-01-25   
605-884 8 Watertown SD   9631 QWEST CORPORATION 640      
605-884 9 Watertown SD   5180 LEVEL 3 COMMUNICATIONS, LLC - SD 640   2008-07-29   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.