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: 327

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-327 A Muskegon MI WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-327 0 Muskegon MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-327 1 Muskegon MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-327 2 Muskegon MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-327 3 Muskegon MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-327 4 Muskegon MI   6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 348   2013-03-18   
231-327 5 Muskegon MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-327 6 Muskegon MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-327 7 Muskegon MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      
231-327 8 Muskegon MI   6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 348   2013-03-18   
231-327 9 Muskegon MI   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348      

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.