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: 320 [Rate centres in NPA 320] [Dial plan for NPA 320]

NXX: 271

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
320-271 A St Joseph MN STCDMNTOXYX  7770 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 626      
320-271 0 St Joseph MN STCDMNTOXYX  7770 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 626      
320-271 1 St Joseph MN STCDMNTOXYX  7770 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 626      
320-271 2 St Joseph MN   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 626   2025-06-01   
320-271 3 St Joseph MN CLSPMNAL0MD  429A MIDCONTINENT COMMUNICATIONS - MN 626   2011-10-14   
320-271 5 St Joseph MN STCDMNTOXUX  8405 TELEPORT COMMUNICATIONS AMERICA, LLC - MN 626   2022-06-29   
320-271 6 St Joseph MN STCDMNTOXQX  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 626   2022-08-31   
320-271 7 St Joseph MN STCDMNTOXHX  508J CENTURYLINK COMMUNICATIONS, LLC 626   2017-06-23   
320-271 8 St Joseph MN STCDMNTOXTX  073H TELNYX LLC 626   2020-07-23   
320-271 9 St Joseph MN STCDMNTOXYX  7770 ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 626      

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.