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: 747

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
231-747 A Muskegon MI MSKGMIXKDS1  0695 FRONTIER NORTH, INC. - MI 348      
231-747 0 Muskegon MI GDRQMIBODMD  6003 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 348   2015-10-30   
231-747 1 Muskegon MI MSKGMIXKDS1  0695 FRONTIER NORTH, INC. - MI 348      
231-747 2 Muskegon MI GDRPMIBL31Z  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348   2004-08-13   
231-747 3 Muskegon MI GDRPMIBL31Z  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348   2004-12-12   
231-747 4 Muskegon MI GDRPMIBL31Z  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348   2004-12-12   
231-747 5 Muskegon MI GDRPMIBL31Z  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 348   2005-02-04   
231-747 6 Muskegon MI GDRPMIBL40Z  318J COMCAST IP PHONE, LLC 348   2008-03-18   
231-747 7 Muskegon MI GDRPMIBL40Z  318J COMCAST IP PHONE, LLC 348   2008-03-18   
231-747 8 Muskegon MI GDRPMIBL40Z  318J COMCAST IP PHONE, LLC 348   2008-03-18   
231-747 9 Muskegon MI GDRPMIBL40Z  318J COMCAST IP PHONE, LLC 348   2008-03-18   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.