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: 231 [Rate centres in NPA 231] [Dial plan for NPA 231]

NXX: 288

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-288 A Muskegon MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-288 0 Muskegon MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2005-11-04   
231-288 1 Muskegon MI   318J COMCAST IP PHONE LLC 348   2007-06-08   
231-288 2 Muskegon MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2007-11-29   
231-288 3 Muskegon MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2006-09-22   
231-288 4 Muskegon MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2006-10-17   
231-288 5 Muskegon MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2006-10-17   
231-288 6 Muskegon MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2007-01-19   
231-288 7 Muskegon MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2007-01-19   
231-288 8 Muskegon MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2007-06-21   
231-288 9 Muskegon MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2007-06-21   

Last updated: Sun, 04 Apr 2021 19:28:27 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.