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.

Switch: STCDMNTOXEY

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
320-546 A Atwater MN 516J TON80 COMMUNICATIONS, LLC 626      
320-627 A Royalton MN 516J TON80 COMMUNICATIONS, LLC 626      
320-737 A Willmar MN 516J TON80 COMMUNICATIONS, LLC 626      
320-767 A Milaca MN 516J TON80 COMMUNICATIONS, LLC 626      
320-782 A Hector MN 516J TON80 COMMUNICATIONS, LLC 626      
320-887 A Benson MN 516J TON80 COMMUNICATIONS, LLC 626      
320-889 A Morris MN 516J TON80 COMMUNICATIONS, LLC 626      
605-992 A Big Stone City SD 516J TON80 COMMUNICATIONS, LLC 626      

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.